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Total
6831 CVE
| CVE | Vendors | Products | Updated | CVSS v2 | CVSS v3 |
|---|---|---|---|---|---|
| CVE-2017-5976 | 2 Debian, Zziplib Project | 2 Debian Linux, Zziplib | 2021-03-31 | 4.3 MEDIUM | 5.5 MEDIUM |
| Heap-based buffer overflow in the zzip_mem_entry_extra_block function in memdisk.c in zziplib 0.13.62, 0.13.61, 0.13.60, 0.13.59, 0.13.58, 0.13.57, 0.13.56 allows remote attackers to cause a denial of service (crash) via a crafted ZIP file. | |||||
| CVE-2017-6831 | 2 Audiofile, Debian | 2 Audiofile, Debian Linux | 2021-03-31 | 4.3 MEDIUM | 5.5 MEDIUM |
| Heap-based buffer overflow in the decodeBlockWAVE function in IMA.cpp in Audio File Library (aka audiofile) 0.3.6, 0.3.5, 0.3.4, 0.3.3, 0.3.2, 0.3.1, 0.3.0 and 0.2.7 allows remote attackers to cause a denial of service (crash) via a crafted file. | |||||
| CVE-2017-6834 | 2 Audiofile, Debian | 2 Audiofile, Debian Linux | 2021-03-31 | 4.3 MEDIUM | 5.5 MEDIUM |
| Heap-based buffer overflow in the ulaw2linear_buf function in G711.cpp in Audio File Library (aka audiofile) 0.3.6, 0.3.5, 0.3.4, 0.3.3, 0.3.2, 0.3.1, 0.3.0, 0.2.7 allows remote attackers to cause a denial of service (crash) via a crafted file. | |||||
| CVE-2020-26935 | 4 Debian, Fedoraproject, Opensuse and 1 more | 5 Debian Linux, Fedora, Backports Sle and 2 more | 2021-03-30 | 7.5 HIGH | 9.8 CRITICAL |
| An issue was discovered in SearchController in phpMyAdmin before 4.9.6 and 5.x before 5.0.3. A SQL injection vulnerability was discovered in how phpMyAdmin processes SQL statements in the search feature. An attacker could use this flaw to inject malicious SQL in to a query. | |||||
| CVE-2020-17490 | 2 Debian, Saltstack | 2 Debian Linux, Salt | 2021-03-30 | 2.1 LOW | 5.5 MEDIUM |
| The TLS module within SaltStack Salt through 3002 creates certificates with weak file permissions. | |||||
| CVE-2020-29599 | 2 Debian, Imagemagick | 2 Debian Linux, Imagemagick | 2021-03-29 | 6.8 MEDIUM | 7.8 HIGH |
| ImageMagick before 6.9.11-40 and 7.x before 7.0.10-40 mishandles the -authenticate option, which allows setting a password for password-protected PDF files. The user-controlled password was not properly escaped/sanitized and it was therefore possible to inject additional shell commands via coders/pdf.c. | |||||
| CVE-2020-25687 | 3 Debian, Fedoraproject, Thekelleys | 3 Debian Linux, Fedora, Dnsmasq | 2021-03-26 | 7.1 HIGH | 5.9 MEDIUM |
| A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in dnsmasq when DNSSEC is enabled and before it validates the received DNS entries. This flaw allows a remote attacker, who can create valid DNS replies, to cause an overflow in a heap-allocated memory. This flaw is caused by the lack of length checks in rfc1035.c:extract_name(), which could be abused to make the code execute memcpy() with a negative size in sort_rrset() and cause a crash in dnsmasq, resulting in a denial of service. The highest threat from this vulnerability is to system availability. | |||||
| CVE-2020-25683 | 3 Debian, Fedoraproject, Thekelleys | 3 Debian Linux, Fedora, Dnsmasq | 2021-03-26 | 7.1 HIGH | 5.9 MEDIUM |
| A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in dnsmasq when DNSSEC is enabled and before it validates the received DNS entries. A remote attacker, who can create valid DNS replies, could use this flaw to cause an overflow in a heap-allocated memory. This flaw is caused by the lack of length checks in rfc1035.c:extract_name(), which could be abused to make the code execute memcpy() with a negative size in get_rdata() and cause a crash in dnsmasq, resulting in a denial of service. The highest threat from this vulnerability is to system availability. | |||||
| CVE-2020-25682 | 3 Debian, Fedoraproject, Thekelleys | 3 Debian Linux, Fedora, Dnsmasq | 2021-03-26 | 8.3 HIGH | 8.1 HIGH |
| A flaw was found in dnsmasq before 2.83. A buffer overflow vulnerability was discovered in the way dnsmasq extract names from DNS packets before validating them with DNSSEC data. An attacker on the network, who can create valid DNS replies, could use this flaw to cause an overflow with arbitrary data in a heap-allocated memory, possibly executing code on the machine. The flaw is in the rfc1035.c:extract_name() function, which writes data to the memory pointed by name assuming MAXDNAME*2 bytes are available in the buffer. However, in some code execution paths, it is possible extract_name() gets passed an offset from the base buffer, thus reducing, in practice, the number of available bytes that can be written in the buffer. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. | |||||
| CVE-2020-25681 | 3 Debian, Fedoraproject, Thekelleys | 3 Debian Linux, Fedora, Dnsmasq | 2021-03-26 | 8.3 HIGH | 8.1 HIGH |
| A flaw was found in dnsmasq before version 2.83. A heap-based buffer overflow was discovered in the way RRSets are sorted before validating with DNSSEC data. An attacker on the network, who can forge DNS replies such as that they are accepted as valid, could use this flaw to cause a buffer overflow with arbitrary data in a heap memory segment, possibly executing code on the machine. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. | |||||
| CVE-2020-17489 | 4 Canonical, Debian, Gnome and 1 more | 4 Ubuntu Linux, Debian Linux, Gnome-shell and 1 more | 2021-03-26 | 1.9 LOW | 4.3 MEDIUM |
| An issue was discovered in certain configurations of GNOME gnome-shell through 3.36.4. When logging out of an account, the password box from the login dialog reappears with the password still visible. If the user had decided to have the password shown in cleartext at login time, it is then visible for a brief moment upon a logout. (If the password were never shown in cleartext, only the password length is revealed.) | |||||
| CVE-2021-28963 | 2 Debian, Shibboleth | 2 Debian Linux, Service Provider | 2021-03-26 | 5.0 MEDIUM | 5.3 MEDIUM |
| Shibboleth Service Provider before 3.2.1 allows content injection because template generation uses attacker-controlled parameters. | |||||
| CVE-2020-25645 | 5 Canonical, Debian, Linux and 2 more | 8 Ubuntu Linux, Debian Linux, Linux Kernel and 5 more | 2021-03-26 | 5.0 MEDIUM | 7.5 HIGH |
| A flaw was found in the Linux kernel in versions before 5.9-rc7. Traffic between two Geneve endpoints may be unencrypted when IPsec is configured to encrypt traffic for the specific UDP port used by the GENEVE tunnel allowing anyone between the two endpoints to read the traffic unencrypted. The main threat from this vulnerability is to data confidentiality. | |||||
| CVE-2020-27764 | 2 Debian, Imagemagick | 2 Debian Linux, Imagemagick | 2021-03-25 | 4.3 MEDIUM | 3.3 LOW |
| In /MagickCore/statistic.c, there are several areas in ApplyEvaluateOperator() where a size_t cast should have been a ssize_t cast, which causes out-of-range values under some circumstances when a crafted input file is processed by ImageMagick. Red Hat Product Security marked this as Low severity because although it could potentially lead to an impact to application availability, no specific impact was shown in this case. This flaw affects ImageMagick versions prior to 6.9.10-69. | |||||
| CVE-2020-27754 | 2 Debian, Imagemagick | 2 Debian Linux, Imagemagick | 2021-03-25 | 4.3 MEDIUM | 3.3 LOW |
| In IntensityCompare() of /magick/quantize.c, there are calls to PixelPacketIntensity() which could return overflowed values to the caller when ImageMagick processes a crafted input file. To mitigate this, the patch introduces and uses the ConstrainPixelIntensity() function, which forces the pixel intensities to be within the proper bounds in the event of an overflow. This flaw affects ImageMagick versions prior to 6.9.10-69 and 7.0.8-69. | |||||
| CVE-2020-27768 | 2 Debian, Imagemagick | 2 Debian Linux, Imagemagick | 2021-03-25 | 4.3 MEDIUM | 3.3 LOW |
| In ImageMagick, there is an outside the range of representable values of type 'unsigned int' at MagickCore/quantum-private.h. This flaw affects ImageMagick versions prior to 7.0.9-0. | |||||
| CVE-2021-3410 | 2 Debian, Libcaca Project | 2 Debian Linux, Libcaca | 2021-03-25 | 4.6 MEDIUM | 7.8 HIGH |
| A flaw was found in libcaca v0.99.beta19. A buffer overflow issue in caca_resize function in libcaca/caca/canvas.c may lead to local execution of arbitrary code in the user context. | |||||
| CVE-2021-20246 | 4 Debian, Fedoraproject, Imagemagick and 1 more | 4 Debian Linux, Fedora, Imagemagick and 1 more | 2021-03-25 | 7.1 HIGH | 5.5 MEDIUM |
| A flaw was found in ImageMagick in MagickCore/resample.c. An attacker who submits a crafted file that is processed by ImageMagick could trigger undefined behavior in the form of math division by zero. The highest threat from this vulnerability is to system availability. | |||||
| CVE-2021-20244 | 4 Debian, Fedoraproject, Imagemagick and 1 more | 4 Debian Linux, Fedora, Imagemagick and 1 more | 2021-03-25 | 7.1 HIGH | 5.5 MEDIUM |
| A flaw was found in ImageMagick in MagickCore/visual-effects.c. An attacker who submits a crafted file that is processed by ImageMagick could trigger undefined behavior in the form of math division by zero. The highest threat from this vulnerability is to system availability. | |||||
| CVE-2021-20241 | 2 Debian, Imagemagick | 2 Debian Linux, Imagemagick | 2021-03-25 | 4.3 MEDIUM | 5.5 MEDIUM |
| A flaw was found in ImageMagick in coders/jp2.c. An attacker who submits a crafted file that is processed by ImageMagick could trigger undefined behavior in the form of math division by zero. The highest threat from this vulnerability is to system availability. | |||||
| CVE-2018-16873 | 4 Debian, Golang, Opensuse and 1 more | 5 Debian Linux, Go, Backports Sle and 2 more | 2021-03-25 | 6.8 MEDIUM | 8.1 HIGH |
| In Go before 1.10.6 and 1.11.x before 1.11.3, the "go get" command is vulnerable to remote code execution when executed with the -u flag and the import path of a malicious Go package, or a package that imports it directly or indirectly. Specifically, it is only vulnerable in GOPATH mode, but not in module mode (the distinction is documented at https://golang.org/cmd/go/#hdr-Module_aware_go_get). Using custom domains, it's possible to arrange things so that a Git repository is cloned to a folder named ".git" by using a vanity import path that ends with "/.git". If the Git repository root contains a "HEAD" file, a "config" file, an "objects" directory, a "refs" directory, with some work to ensure the proper ordering of operations, "go get -u" can be tricked into considering the parent directory as a repository root, and running Git commands on it. That will use the "config" file in the original Git repository root for its configuration, and if that config file contains malicious commands, they will execute on the system running "go get -u". | |||||
| CVE-2021-3178 | 3 Debian, Fedoraproject, Linux | 3 Debian Linux, Fedora, Linux Kernel | 2021-03-25 | 5.5 MEDIUM | 6.5 MEDIUM |
| ** DISPUTED ** fs/nfsd/nfs3xdr.c in the Linux kernel through 5.10.8, when there is an NFS export of a subdirectory of a filesystem, allows remote attackers to traverse to other parts of the filesystem via READDIRPLUS. NOTE: some parties argue that such a subdirectory export is not intended to prevent this attack; see also the exports(5) no_subtree_check default behavior. | |||||
| CVE-2018-7489 | 4 Debian, Fasterxml, Oracle and 1 more | 5 Debian Linux, Jackson-databind, Communications Billing And Revenue Management and 2 more | 2021-03-25 | 7.5 HIGH | 9.8 CRITICAL |
| FasterXML jackson-databind before 2.7.9.3, 2.8.x before 2.8.11.1 and 2.9.x before 2.9.5 allows unauthenticated remote code execution because of an incomplete fix for the CVE-2017-7525 deserialization flaw. This is exploitable by sending maliciously crafted JSON input to the readValue method of the ObjectMapper, bypassing a blacklist that is ineffective if the c3p0 libraries are available in the classpath. | |||||
| CVE-2017-12424 | 2 Debian, Shadow Project | 2 Debian Linux, Shadow | 2021-03-23 | 7.5 HIGH | 9.8 CRITICAL |
| In shadow before 4.5, the newusers tool could be made to manipulate internal data structures in ways unintended by the authors. Malformed input may lead to crashes (with a buffer overflow or other memory corruption) or other unspecified behaviors. This crosses a privilege boundary in, for example, certain web-hosting environments in which a Control Panel allows an unprivileged user account to create subaccounts. | |||||
| CVE-2010-2497 | 3 Apple, Debian, Freetype | 3 Mac Os X, Debian Linux, Freetype | 2021-03-23 | 6.8 MEDIUM | N/A |
| Integer underflow in glyph handling in FreeType before 2.4.0 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted font file. | |||||
| CVE-2010-2500 | 4 Apple, Canonical, Debian and 1 more | 4 Mac Os X, Ubuntu Linux, Debian Linux and 1 more | 2021-03-23 | 6.8 MEDIUM | N/A |
| Integer overflow in the gray_render_span function in smooth/ftgrays.c in FreeType before 2.4.0 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted font file. | |||||
| CVE-2010-2520 | 4 Apple, Canonical, Debian and 1 more | 4 Mac Os X, Ubuntu Linux, Debian Linux and 1 more | 2021-03-23 | 5.1 MEDIUM | N/A |
| Heap-based buffer overflow in the Ins_IUP function in truetype/ttinterp.c in FreeType before 2.4.0, when TrueType bytecode support is enabled, allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted font file. | |||||
| CVE-2010-2519 | 4 Apple, Canonical, Debian and 1 more | 4 Mac Os X, Ubuntu Linux, Debian Linux and 1 more | 2021-03-23 | 6.8 MEDIUM | N/A |
| Heap-based buffer overflow in the Mac_Read_POST_Resource function in base/ftobjs.c in FreeType before 2.4.0 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted length value in a POST fragment header in a font file. | |||||
| CVE-2018-16874 | 4 Debian, Golang, Opensuse and 1 more | 5 Debian Linux, Go, Backports Sle and 2 more | 2021-03-22 | 6.8 MEDIUM | 8.1 HIGH |
| In Go before 1.10.6 and 1.11.x before 1.11.3, the "go get" command is vulnerable to directory traversal when executed with the import path of a malicious Go package which contains curly braces (both '{' and '}' characters). Specifically, it is only vulnerable in GOPATH mode, but not in module mode (the distinction is documented at https://golang.org/cmd/go/#hdr-Module_aware_go_get). The attacker can cause an arbitrary filesystem write, which can lead to code execution. | |||||
| CVE-2021-3114 | 4 Debian, Fedoraproject, Golang and 1 more | 5 Debian Linux, Fedora, Go and 2 more | 2021-03-22 | 6.4 MEDIUM | 6.5 MEDIUM |
| In Go before 1.14.14 and 1.15.x before 1.15.7, crypto/elliptic/p224.go can generate incorrect outputs, related to an underflow of the lowest limb during the final complete reduction in the P-224 field. | |||||
| CVE-2019-16276 | 6 Debian, Fedoraproject, Golang and 3 more | 9 Debian Linux, Fedora, Go and 6 more | 2021-03-22 | 5.0 MEDIUM | 7.5 HIGH |
| Go before 1.12.10 and 1.13.x before 1.13.1 allow HTTP Request Smuggling. | |||||
| CVE-2019-9741 | 4 Debian, Fedoraproject, Golang and 1 more | 5 Debian Linux, Fedora, Go and 2 more | 2021-03-22 | 4.3 MEDIUM | 6.1 MEDIUM |
| An issue was discovered in net/http in Go 1.11.5. CRLF injection is possible if the attacker controls a url parameter, as demonstrated by the second argument to http.NewRequest with \r\n followed by an HTTP header or a Redis command. | |||||
| CVE-2020-8625 | 3 Debian, Fedoraproject, Isc | 3 Debian Linux, Fedora, Bind | 2021-03-19 | 6.8 MEDIUM | 8.1 HIGH |
| BIND servers are vulnerable if they are running an affected version and are configured to use GSS-TSIG features. In a configuration which uses BIND's default settings the vulnerable code path is not exposed, but a server can be rendered vulnerable by explicitly setting valid values for the tkey-gssapi-keytab or tkey-gssapi-credentialconfiguration options. Although the default configuration is not vulnerable, GSS-TSIG is frequently used in networks where BIND is integrated with Samba, as well as in mixed-server environments that combine BIND servers with Active Directory domain controllers. The most likely outcome of a successful exploitation of the vulnerability is a crash of the named process. However, remote code execution, while unproven, is theoretically possible. Affects: BIND 9.5.0 -> 9.11.27, 9.12.0 -> 9.16.11, and versions BIND 9.11.3-S1 -> 9.11.27-S1 and 9.16.8-S1 -> 9.16.11-S1 of BIND Supported Preview Edition. Also release versions 9.17.0 -> 9.17.1 of the BIND 9.17 development branch | |||||
| CVE-2017-15041 | 3 Debian, Golang, Redhat | 7 Debian Linux, Go, Developer Tools and 4 more | 2021-03-19 | 7.5 HIGH | 9.8 CRITICAL |
| Go before 1.8.4 and 1.9.x before 1.9.1 allows "go get" remote command execution. Using custom domains, it is possible to arrange things so that example.com/pkg1 points to a Subversion repository but example.com/pkg1/pkg2 points to a Git repository. If the Subversion repository includes a Git checkout in its pkg2 directory and some other work is done to ensure the proper ordering of operations, "go get" can be tricked into reusing this Git checkout for the fetch of code from pkg2. If the Subversion repository's Git checkout has malicious commands in .git/hooks/, they will execute on the system running "go get." | |||||
| CVE-2020-5260 | 6 Canonical, Debian, Fedoraproject and 3 more | 6 Ubuntu Linux, Debian Linux, Fedora and 3 more | 2021-03-19 | 5.0 MEDIUM | 7.5 HIGH |
| Affected versions of Git have a vulnerability whereby Git can be tricked into sending private credentials to a host controlled by an attacker. Git uses external "credential helper" programs to store and retrieve passwords or other credentials from secure storage provided by the operating system. Specially-crafted URLs that contain an encoded newline can inject unintended values into the credential helper protocol stream, causing the credential helper to retrieve the password for one server (e.g., good.example.com) for an HTTP request being made to another server (e.g., evil.example.com), resulting in credentials for the former being sent to the latter. There are no restrictions on the relationship between the two, meaning that an attacker can craft a URL that will present stored credentials for any host to a host of their choosing. The vulnerability can be triggered by feeding a malicious URL to git clone. However, the affected URLs look rather suspicious; the likely vector would be through systems which automatically clone URLs not visible to the user, such as Git submodules, or package systems built around Git. The problem has been patched in the versions published on April 14th, 2020, going back to v2.17.x. Anyone wishing to backport the change further can do so by applying commit 9a6bbee (the full release includes extra checks for git fsck, but that commit is sufficient to protect clients against the vulnerability). The patched versions are: 2.17.4, 2.18.3, 2.19.4, 2.20.3, 2.21.2, 2.22.3, 2.23.2, 2.24.2, 2.25.3, 2.26.1. | |||||
| CVE-2020-15810 | 5 Canonical, Debian, Fedoraproject and 2 more | 5 Ubuntu Linux, Debian Linux, Fedora and 2 more | 2021-03-17 | 3.5 LOW | 6.5 MEDIUM |
| An issue was discovered in Squid before 4.13 and 5.x before 5.0.4. Due to incorrect data validation, HTTP Request Smuggling attacks may succeed against HTTP and HTTPS traffic. This leads to cache poisoning. This allows any client, including browser scripts, to bypass local security and poison the proxy cache and any downstream caches with content from an arbitrary source. When configured for relaxed header parsing (the default), Squid relays headers containing whitespace characters to upstream servers. When this occurs as a prefix to a Content-Length header, the frame length specified will be ignored by Squid (allowing for a conflicting length to be used from another Content-Length header) but relayed upstream. | |||||
| CVE-2020-15991 | 4 Debian, Fedoraproject, Google and 1 more | 4 Debian Linux, Fedora, Chrome and 1 more | 2021-03-17 | 6.8 MEDIUM | 8.8 HIGH |
| Use after free in password manager in Google Chrome prior to 86.0.4240.75 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. | |||||
| CVE-2020-16000 | 4 Debian, Fedoraproject, Google and 1 more | 4 Debian Linux, Fedora, Chrome and 1 more | 2021-03-17 | 6.8 MEDIUM | 8.8 HIGH |
| Inappropriate implementation in Blink in Google Chrome prior to 86.0.4240.111 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. | |||||
| CVE-2020-15990 | 4 Debian, Fedoraproject, Google and 1 more | 4 Debian Linux, Fedora, Chrome and 1 more | 2021-03-17 | 6.8 MEDIUM | 8.8 HIGH |
| Use after free in autofill in Google Chrome prior to 86.0.4240.75 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. | |||||
| CVE-2020-11945 | 5 Canonical, Debian, Fedoraproject and 2 more | 5 Ubuntu Linux, Debian Linux, Fedora and 2 more | 2021-03-17 | 7.5 HIGH | 9.8 CRITICAL |
| An issue was discovered in Squid before 5.0.2. A remote attacker can replay a sniffed Digest Authentication nonce to gain access to resources that are otherwise forbidden. This occurs because the attacker can overflow the nonce reference counter (a short integer). Remote code execution may occur if the pooled token credentials are freed (instead of replayed as valid credentials). | |||||
| CVE-2020-6525 | 4 Debian, Fedoraproject, Google and 1 more | 5 Debian Linux, Fedora, Chrome and 2 more | 2021-03-16 | 6.8 MEDIUM | 8.8 HIGH |
| Heap buffer overflow in Skia in Google Chrome prior to 84.0.4147.89 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. | |||||
| CVE-2020-6527 | 4 Debian, Fedoraproject, Google and 1 more | 5 Debian Linux, Fedora, Chrome and 2 more | 2021-03-16 | 4.3 MEDIUM | 4.3 MEDIUM |
| Insufficient policy enforcement in CSP in Google Chrome prior to 84.0.4147.89 allowed a remote attacker to bypass content security policy via a crafted HTML page. | |||||
| CVE-2020-6536 | 4 Debian, Fedoraproject, Google and 1 more | 5 Debian Linux, Fedora, Chrome and 2 more | 2021-03-16 | 4.3 MEDIUM | 4.3 MEDIUM |
| Incorrect security UI in PWAs in Google Chrome prior to 84.0.4147.89 allowed a remote attacker who had persuaded the user to install a PWA to spoof the contents of the Omnibox (URL bar) via a crafted PWA. | |||||
| CVE-2020-6537 | 3 Debian, Fedoraproject, Google | 3 Debian Linux, Fedora, Chrome | 2021-03-16 | 6.8 MEDIUM | 8.8 HIGH |
| Type confusion in V8 in Google Chrome prior to 84.0.4147.105 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. | |||||
| CVE-2020-29482 | 3 Debian, Fedoraproject, Xen | 3 Debian Linux, Fedora, Xen | 2021-03-16 | 4.9 MEDIUM | 6.0 MEDIUM |
| An issue was discovered in Xen through 4.14.x. A guest may access xenstore paths via absolute paths containing a full pathname, or via a relative path, which implicitly includes /local/domain/$DOMID for their own domain id. Management tools must access paths in guests' namespaces, necessarily using absolute paths. oxenstored imposes a pathname limit that is applied solely to the relative or absolute path specified by the client. Therefore, a guest can create paths in its own namespace which are too long for management tools to access. Depending on the toolstack in use, a malicious guest administrator might cause some management tools and debugging operations to fail. For example, a guest administrator can cause "xenstore-ls -r" to fail. However, a guest administrator cannot prevent the host administrator from tearing down the domain. All systems using oxenstored are vulnerable. Building and using oxenstored is the default in the upstream Xen distribution, if the Ocaml compiler is available. Systems using C xenstored are not vulnerable. | |||||
| CVE-2020-29483 | 3 Debian, Fedoraproject, Xen | 3 Debian Linux, Fedora, Xen | 2021-03-16 | 4.9 MEDIUM | 6.5 MEDIUM |
| An issue was discovered in Xen through 4.14.x. Xenstored and guests communicate via a shared memory page using a specific protocol. When a guest violates this protocol, xenstored will drop the connection to that guest. Unfortunately, this is done by just removing the guest from xenstored's internal management, resulting in the same actions as if the guest had been destroyed, including sending an @releaseDomain event. @releaseDomain events do not say that the guest has been removed. All watchers of this event must look at the states of all guests to find the guest that has been removed. When an @releaseDomain is generated due to a domain xenstored protocol violation, because the guest is still running, the watchers will not react. Later, when the guest is actually destroyed, xenstored will no longer have it stored in its internal data base, so no further @releaseDomain event will be sent. This can lead to a zombie domain; memory mappings of that guest's memory will not be removed, due to the missing event. This zombie domain will be cleaned up only after another domain is destroyed, as that will trigger another @releaseDomain event. If the device model of the guest that violated the Xenstore protocol is running in a stub-domain, a use-after-free case could happen in xenstored, after having removed the guest from its internal data base, possibly resulting in a crash of xenstored. A malicious guest can block resources of the host for a period after its own death. Guests with a stub domain device model can eventually crash xenstored, resulting in a more serious denial of service (the prevention of any further domain management operations). Only the C variant of Xenstore is affected; the Ocaml variant is not affected. Only HVM guests with a stubdom device model can cause a serious DoS. | |||||
| CVE-2020-29484 | 3 Debian, Fedoraproject, Xen | 3 Debian Linux, Fedora, Xen | 2021-03-16 | 4.9 MEDIUM | 6.0 MEDIUM |
| An issue was discovered in Xen through 4.14.x. When a Xenstore watch fires, the xenstore client that registered the watch will receive a Xenstore message containing the path of the modified Xenstore entry that triggered the watch, and the tag that was specified when registering the watch. Any communication with xenstored is done via Xenstore messages, consisting of a message header and the payload. The payload length is limited to 4096 bytes. Any request to xenstored resulting in a response with a payload longer than 4096 bytes will result in an error. When registering a watch, the payload length limit applies to the combined length of the watched path and the specified tag. Because watches for a specific path are also triggered for all nodes below that path, the payload of a watch event message can be longer than the payload needed to register the watch. A malicious guest that registers a watch using a very large tag (i.e., with a registration operation payload length close to the 4096 byte limit) can cause the generation of watch events with a payload length larger than 4096 bytes, by writing to Xenstore entries below the watched path. This will result in an error condition in xenstored. This error can result in a NULL pointer dereference, leading to a crash of xenstored. A malicious guest administrator can cause xenstored to crash, leading to a denial of service. Following a xenstored crash, domains may continue to run, but management operations will be impossible. Only C xenstored is affected, oxenstored is not affected. | |||||
| CVE-2020-29485 | 3 Debian, Fedoraproject, Xen | 3 Debian Linux, Fedora, Xen | 2021-03-16 | 4.9 MEDIUM | 5.5 MEDIUM |
| An issue was discovered in Xen 4.6 through 4.14.x. When acting upon a guest XS_RESET_WATCHES request, not all tracking information is freed. A guest can cause unbounded memory usage in oxenstored. This can lead to a system-wide DoS. Only systems using the Ocaml Xenstored implementation are vulnerable. Systems using the C Xenstored implementation are not vulnerable. | |||||
| CVE-2015-9267 | 2 Debian, Nullsoft | 2 Debian Linux, Nullsoft Scriptable Install System | 2021-03-15 | 3.6 LOW | 5.5 MEDIUM |
| Nullsoft Scriptable Install System (NSIS) before 2.49 uses temporary folder locations that allow unprivileged local users to overwrite files. This allows a local attack in which either a plugin or the uninstaller can be replaced by a Trojan horse program. | |||||
| CVE-2015-9268 | 2 Debian, Nullsoft | 2 Debian Linux, Nullsoft Scriptable Install System | 2021-03-15 | 9.3 HIGH | 7.8 HIGH |
| Nullsoft Scriptable Install System (NSIS) before 2.49 has unsafe implicit linking against Version.dll. In other words, there is no protection mechanism in which a wrapper function resolves the dependency at an appropriate time during runtime. | |||||