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2727 CVE
| CVE | Vendors | Products | Updated | CVSS v2 | CVSS v3 |
|---|---|---|---|---|---|
| CVE-2019-10899 | 5 Canonical, Debian, Fedoraproject and 2 more | 5 Ubuntu Linux, Debian Linux, Fedora and 2 more | 2022-05-03 | 5.0 MEDIUM | 7.5 HIGH |
| In Wireshark 2.4.0 to 2.4.13, 2.6.0 to 2.6.7, and 3.0.0, the SRVLOC dissector could crash. This was addressed in epan/dissectors/packet-srvloc.c by preventing a heap-based buffer under-read. | |||||
| CVE-2019-9752 | 2 Opensuse, Otrs | 3 Backports Sle, Leap, Otrs | 2022-05-03 | 3.5 LOW | 5.4 MEDIUM |
| An issue was discovered in Open Ticket Request System (OTRS) 5.x before 5.0.34, 6.x before 6.0.16, and 7.x before 7.0.4. An attacker who is logged into OTRS as an agent or a customer user may upload a carefully crafted resource in order to cause execution of JavaScript in the context of OTRS. This is related to Content-type mishandling in Kernel/Modules/PictureUpload.pm. | |||||
| CVE-2019-10740 | 3 Fedoraproject, Opensuse, Roundcube | 4 Fedora, Backports Sle, Leap and 1 more | 2022-05-03 | 4.3 MEDIUM | 4.3 MEDIUM |
| In Roundcube Webmail before 1.3.10, an attacker in possession of S/MIME or PGP encrypted emails can wrap them as sub-parts within a crafted multipart email. The encrypted part(s) can further be hidden using HTML/CSS or ASCII newline characters. This modified multipart email can be re-sent by the attacker to the intended receiver. If the receiver replies to this (benign looking) email, they unknowingly leak the plaintext of the encrypted message part(s) back to the attacker. | |||||
| CVE-2020-6448 | 4 Debian, Fedoraproject, Google and 1 more | 5 Debian Linux, Fedora, Chrome and 2 more | 2022-05-03 | 6.8 MEDIUM | 8.8 HIGH |
| Use after free in V8 in Google Chrome prior to 81.0.4044.92 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. | |||||
| CVE-2019-18179 | 3 Debian, Opensuse, Otrs | 4 Debian Linux, Backports Sle, Leap and 1 more | 2022-05-03 | 4.0 MEDIUM | 4.3 MEDIUM |
| An issue was discovered in Open Ticket Request System (OTRS) 7.0.x through 7.0.12, and Community Edition 5.0.x through 5.0.38 and 6.0.x through 6.0.23. An attacker who is logged into OTRS as an agent is able to list tickets assigned to other agents, even tickets in a queue where the attacker doesn't have permissions. | |||||
| CVE-2020-12105 | 2 Infradead, Opensuse | 2 Openconnect, Leap | 2022-05-03 | 4.3 MEDIUM | 5.9 MEDIUM |
| OpenConnect through 8.08 mishandles negative return values from X509_check_ function calls, which might assist attackers in performing man-in-the-middle attacks. | |||||
| CVE-2020-12769 | 5 Canonical, Debian, Linux and 2 more | 36 Ubuntu Linux, Debian Linux, Linux Kernel and 33 more | 2022-05-03 | 4.9 MEDIUM | 5.5 MEDIUM |
| An issue was discovered in the Linux kernel before 5.4.17. drivers/spi/spi-dw.c allows attackers to cause a panic via concurrent calls to dw_spi_irq and dw_spi_transfer_one, aka CID-19b61392c5a8. | |||||
| CVE-2020-11652 | 6 Blackberry, Canonical, Debian and 3 more | 6 Workspaces Server, Ubuntu Linux, Debian Linux and 3 more | 2022-05-03 | 4.0 MEDIUM | 6.5 MEDIUM |
| An issue was discovered in SaltStack Salt before 2019.2.4 and 3000 before 3000.2. The salt-master process ClearFuncs class allows access to some methods that improperly sanitize paths. These methods allow arbitrary directory access to authenticated users. | |||||
| CVE-2020-11740 | 4 Debian, Fedoraproject, Opensuse and 1 more | 4 Debian Linux, Fedora, Leap and 1 more | 2022-05-03 | 2.1 LOW | 5.5 MEDIUM |
| An issue was discovered in xenoprof in Xen through 4.13.x, allowing guest OS users (without active profiling) to obtain sensitive information about other guests. Unprivileged guests can request to map xenoprof buffers, even if profiling has not been enabled for those guests. These buffers were not scrubbed. | |||||
| CVE-2020-11741 | 4 Debian, Fedoraproject, Opensuse and 1 more | 4 Debian Linux, Fedora, Leap and 1 more | 2022-05-03 | 6.9 MEDIUM | 8.8 HIGH |
| An issue was discovered in xenoprof in Xen through 4.13.x, allowing guest OS users (with active profiling) to obtain sensitive information about other guests, cause a denial of service, or possibly gain privileges. For guests for which "active" profiling was enabled by the administrator, the xenoprof code uses the standard Xen shared ring structure. Unfortunately, this code did not treat the guest as a potential adversary: it trusts the guest not to modify buffer size information or modify head / tail pointers in unexpected ways. This can crash the host (DoS). Privilege escalation cannot be ruled out. | |||||
| CVE-2020-11739 | 4 Debian, Fedoraproject, Opensuse and 1 more | 4 Debian Linux, Fedora, Leap and 1 more | 2022-05-03 | 6.9 MEDIUM | 7.8 HIGH |
| An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service or possibly gain privileges because of missing memory barriers in read-write unlock paths. The read-write unlock paths don't contain a memory barrier. On Arm, this means a processor is allowed to re-order the memory access with the preceding ones. In other words, the unlock may be seen by another processor before all the memory accesses within the "critical" section. As a consequence, it may be possible to have a writer executing a critical section at the same time as readers or another writer. In other words, many of the assumptions (e.g., a variable cannot be modified after a check) in the critical sections are not safe anymore. The read-write locks are used in hypercalls (such as grant-table ones), so a malicious guest could exploit the race. For instance, there is a small window where Xen can leak memory if XENMAPSPACE_grant_table is used concurrently. A malicious guest may be able to leak memory, or cause a hypervisor crash resulting in a Denial of Service (DoS). Information leak and privilege escalation cannot be excluded. | |||||
| CVE-2020-6454 | 4 Debian, Fedoraproject, Google and 1 more | 5 Debian Linux, Fedora, Chrome and 2 more | 2022-05-03 | 6.8 MEDIUM | 8.8 HIGH |
| Use after free in extensions in Google Chrome prior to 81.0.4044.92 allowed an attacker who convinced a user to install a malicious extension to potentially exploit heap corruption via a crafted Chrome Extension. | |||||
| CVE-2020-15563 | 4 Debian, Fedoraproject, Opensuse and 1 more | 4 Debian Linux, Fedora, Leap and 1 more | 2022-05-03 | 4.7 MEDIUM | 6.5 MEDIUM |
| An issue was discovered in Xen through 4.13.x, allowing x86 HVM guest OS users to cause a hypervisor crash. An inverted conditional in x86 HVM guests' dirty video RAM tracking code allows such guests to make Xen de-reference a pointer guaranteed to point at unmapped space. A malicious or buggy HVM guest may cause the hypervisor to crash, resulting in Denial of Service (DoS) affecting the entire host. Xen versions from 4.8 onwards are affected. Xen versions 4.7 and earlier are not affected. Only x86 systems are affected. Arm systems are not affected. Only x86 HVM guests using shadow paging can leverage the vulnerability. In addition, there needs to be an entity actively monitoring a guest's video frame buffer (typically for display purposes) in order for such a guest to be able to leverage the vulnerability. x86 PV guests, as well as x86 HVM guests using hardware assisted paging (HAP), cannot leverage the vulnerability. | |||||
| CVE-2020-12416 | 2 Mozilla, Opensuse | 2 Firefox, Leap | 2022-05-03 | 9.3 HIGH | 8.8 HIGH |
| A VideoStreamEncoder may have been freed in a race condition with VideoBroadcaster::AddOrUpdateSink, resulting in a use-after-free, memory corruption, and a potentially exploitable crash. This vulnerability affects Firefox < 78. | |||||
| CVE-2020-15567 | 4 Debian, Fedoraproject, Opensuse and 1 more | 4 Debian Linux, Fedora, Leap and 1 more | 2022-05-03 | 4.4 MEDIUM | 7.8 HIGH |
| An issue was discovered in Xen through 4.13.x, allowing Intel guest OS users to gain privileges or cause a denial of service because of non-atomic modification of a live EPT PTE. When mapping guest EPT (nested paging) tables, Xen would in some circumstances use a series of non-atomic bitfield writes. Depending on the compiler version and optimisation flags, Xen might expose a dangerous partially written PTE to the hardware, which an attacker might be able to race to exploit. A guest administrator or perhaps even an unprivileged guest user might be able to cause denial of service, data corruption, or privilege escalation. Only systems using Intel CPUs are vulnerable. Systems using AMD CPUs, and Arm systems, are not vulnerable. Only systems using nested paging (hap, aka nested paging, aka in this case Intel EPT) are vulnerable. Only HVM and PVH guests can exploit the vulnerability. The presence and scope of the vulnerability depends on the precise optimisations performed by the compiler used to build Xen. If the compiler generates (a) a single 64-bit write, or (b) a series of read-modify-write operations in the same order as the source code, the hypervisor is not vulnerable. For example, in one test build using GCC 8.3 with normal settings, the compiler generated multiple (unlocked) read-modify-write operations in source-code order, which did not constitute a vulnerability. We have not been able to survey compilers; consequently we cannot say which compiler(s) might produce vulnerable code (with which code-generation options). The source code clearly violates the C rules, and thus should be considered vulnerable. | |||||
| CVE-2020-14416 | 2 Linux, Opensuse | 2 Linux Kernel, Leap | 2022-05-03 | 4.7 MEDIUM | 4.2 MEDIUM |
| In the Linux kernel before 5.4.16, a race condition in tty->disc_data handling in the slip and slcan line discipline could lead to a use-after-free, aka CID-0ace17d56824. This affects drivers/net/slip/slip.c and drivers/net/can/slcan.c. | |||||
| CVE-2020-12417 | 3 Canonical, Mozilla, Opensuse | 5 Ubuntu Linux, Firefox, Firefox Esr and 2 more | 2022-05-03 | 9.3 HIGH | 8.8 HIGH |
| Due to confusion about ValueTags on JavaScript Objects, an object may pass through the type barrier, resulting in memory corruption and a potentially exploitable crash. *Note: this issue only affects Firefox on ARM64 platforms.* This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0. | |||||
| CVE-2020-12420 | 3 Canonical, Mozilla, Opensuse | 5 Ubuntu Linux, Firefox, Firefox Esr and 2 more | 2022-05-03 | 9.3 HIGH | 8.8 HIGH |
| When trying to connect to a STUN server, a race condition could have caused a use-after-free of a pointer, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0. | |||||
| CVE-2020-15655 | 3 Canonical, Mozilla, Opensuse | 5 Ubuntu Linux, Firefox, Firefox Esr and 2 more | 2022-05-03 | 4.3 MEDIUM | 6.5 MEDIUM |
| A redirected HTTP request which is observed or modified through a web extension could bypass existing CORS checks, leading to potential disclosure of cross-origin information. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1. | |||||
| CVE-2020-11494 | 4 Canonical, Debian, Linux and 1 more | 4 Ubuntu Linux, Debian Linux, Linux Kernel and 1 more | 2022-04-29 | 2.1 LOW | 4.4 MEDIUM |
| An issue was discovered in slc_bump in drivers/net/can/slcan.c in the Linux kernel 3.16 through 5.6.2. It allows attackers to read uninitialized can_frame data, potentially containing sensitive information from kernel stack memory, if the configuration lacks CONFIG_INIT_STACK_ALL, aka CID-b9258a2cece4. | |||||
| CVE-2020-12656 | 3 Canonical, Linux, Opensuse | 3 Ubuntu Linux, Linux Kernel, Leap | 2022-04-29 | 2.1 LOW | 5.5 MEDIUM |
| ** DISPUTED ** gss_mech_free in net/sunrpc/auth_gss/gss_mech_switch.c in the rpcsec_gss_krb5 implementation in the Linux kernel through 5.6.10 lacks certain domain_release calls, leading to a memory leak. Note: This was disputed with the assertion that the issue does not grant any access not already available. It is a problem that on unloading a specific kernel module some memory is leaked, but loading kernel modules is a privileged operation. A user could also write a kernel module to consume any amount of memory they like and load that replicating the effect of this bug. | |||||
| CVE-2020-12243 | 8 Apple, Broadcom, Canonical and 5 more | 26 Mac Os X, Brocade Fabric Operating System, Ubuntu Linux and 23 more | 2022-04-29 | 5.0 MEDIUM | 7.5 HIGH |
| In filter.c in slapd in OpenLDAP before 2.4.50, LDAP search filters with nested boolean expressions can result in denial of service (daemon crash). | |||||
| CVE-2020-12066 | 5 Canonical, Debian, Fedoraproject and 2 more | 6 Ubuntu Linux, Debian Linux, Fedora and 3 more | 2022-04-29 | 7.8 HIGH | 7.5 HIGH |
| CServer::SendMsg in engine/server/server.cpp in Teeworlds 0.7.x before 0.7.5 allows remote attackers to shut down the server. | |||||
| CVE-2020-12641 | 2 Opensuse, Roundcube | 3 Backports Sle, Leap, Webmail | 2022-04-29 | 7.5 HIGH | 9.8 CRITICAL |
| rcube_image.php in Roundcube Webmail before 1.4.4 allows attackers to execute arbitrary code via shell metacharacters in a configuration setting for im_convert_path or im_identify_path. | |||||
| CVE-2020-12864 | 3 Canonical, Opensuse, Sane-project | 3 Ubuntu Linux, Leap, Sane Backends | 2022-04-28 | 3.3 LOW | 4.3 MEDIUM |
| An out-of-bounds read in SANE Backends before 1.0.30 may allow a malicious device connected to the same local network as the victim to read important information, such as the ASLR offsets of the program, aka GHSL-2020-081. | |||||
| CVE-2020-0543 | 6 Canonical, Fedoraproject, Intel and 3 more | 719 Ubuntu Linux, Fedora, Celeron 1000m and 716 more | 2022-04-28 | 2.1 LOW | 5.5 MEDIUM |
| Incomplete cleanup from specific special register read operations in some Intel(R) Processors may allow an authenticated user to potentially enable information disclosure via local access. | |||||
| CVE-2020-1269 | 2 Microsoft, Opensuse | 9 Windows 10, Windows 7, Windows 8.1 and 6 more | 2022-04-28 | 7.2 HIGH | 7.8 HIGH |
| An elevation of privilege vulnerability exists when the Windows kernel fails to properly handle objects in memory, aka 'Windows Kernel Elevation of Privilege Vulnerability'. This CVE ID is unique from CVE-2020-0986, CVE-2020-1237, CVE-2020-1246, CVE-2020-1262, CVE-2020-1264, CVE-2020-1266, CVE-2020-1273, CVE-2020-1274, CVE-2020-1275, CVE-2020-1276, CVE-2020-1307, CVE-2020-1316. | |||||
| CVE-2020-13800 | 3 Canonical, Opensuse, Qemu | 3 Ubuntu Linux, Leap, Qemu | 2022-04-28 | 4.9 MEDIUM | 6.0 MEDIUM |
| ati-vga in hw/display/ati.c in QEMU 4.2.0 allows guest OS users to trigger infinite recursion via a crafted mm_index value during an ati_mm_read or ati_mm_write call. | |||||
| CVE-2020-13844 | 2 Arm, Opensuse | 15 Cortex-a32, Cortex-a32 Firmware, Cortex-a34 and 12 more | 2022-04-28 | 2.1 LOW | 5.5 MEDIUM |
| Arm Armv8-A core implementations utilizing speculative execution past unconditional changes in control flow may allow unauthorized disclosure of information to an attacker with local user access via a side-channel analysis, aka "straight-line speculation." | |||||
| CVE-2020-13696 | 5 Canonical, Debian, Fedoraproject and 2 more | 6 Ubuntu Linux, Debian Linux, Fedora and 3 more | 2022-04-28 | 3.6 LOW | 4.4 MEDIUM |
| An issue was discovered in LinuxTV xawtv before 3.107. The function dev_open() in v4l-conf.c does not perform sufficient checks to prevent an unprivileged caller of the program from opening unintended filesystem paths. This allows a local attacker with access to the v4l-conf setuid-root program to test for the existence of arbitrary files and to trigger an open on arbitrary files with mode O_RDWR. To achieve this, relative path components need to be added to the device path, as demonstrated by a v4l-conf -c /dev/../root/.bash_history command. | |||||
| CVE-2019-20810 | 3 Canonical, Linux, Opensuse | 3 Ubuntu Linux, Linux Kernel, Leap | 2022-04-28 | 4.9 MEDIUM | 5.5 MEDIUM |
| go7007_snd_init in drivers/media/usb/go7007/snd-go7007.c in the Linux kernel before 5.6 does not call snd_card_free for a failure path, which causes a memory leak, aka CID-9453264ef586. | |||||
| CVE-2020-14309 | 2 Gnu, Opensuse | 2 Grub2, Leap | 2022-04-28 | 4.6 MEDIUM | 6.7 MEDIUM |
| There's an issue with grub2 in all versions before 2.06 when handling squashfs filesystems containing a symbolic link with name length of UINT32 bytes in size. The name size leads to an arithmetic overflow leading to a zero-size allocation further causing a heap-based buffer overflow with attacker controlled data. | |||||
| CVE-2020-17367 | 4 Debian, Fedoraproject, Firejail Project and 1 more | 4 Debian Linux, Fedora, Firejail and 1 more | 2022-04-28 | 4.6 MEDIUM | 7.8 HIGH |
| Firejail through 0.9.62 does not honor the -- end-of-options indicator after the --output option, which may lead to command injection. | |||||
| CVE-2020-15396 | 4 Fedoraproject, Hylafax\+ Project, Ifax and 1 more | 5 Fedora, Hylafax\+, Hylafax Enterprise and 2 more | 2022-04-28 | 7.2 HIGH | 7.8 HIGH |
| In HylaFAX+ through 7.0.2 and HylaFAX Enterprise, the faxsetup utility calls chown on files in user-owned directories. By winning a race, a local attacker could use this to escalate his privileges to root. | |||||
| CVE-2020-14303 | 5 Canonical, Debian, Fedoraproject and 2 more | 5 Ubuntu Linux, Debian Linux, Fedora and 2 more | 2022-04-28 | 5.0 MEDIUM | 7.5 HIGH |
| A flaw was found in the AD DC NBT server in all Samba versions before 4.10.17, before 4.11.11 and before 4.12.4. A samba user could send an empty UDP packet to cause the samba server to crash. | |||||
| CVE-2020-15393 | 4 Canonical, Debian, Linux and 1 more | 4 Ubuntu Linux, Debian Linux, Linux Kernel and 1 more | 2022-04-28 | 2.1 LOW | 5.5 MEDIUM |
| In the Linux kernel 4.4 through 5.7.6, usbtest_disconnect in drivers/usb/misc/usbtest.c has a memory leak, aka CID-28ebeb8db770. | |||||
| CVE-2019-20919 | 5 Canonical, Debian, Fedoraproject and 2 more | 5 Ubuntu Linux, Debian Linux, Fedora and 2 more | 2022-04-28 | 1.9 LOW | 4.7 MEDIUM |
| An issue was discovered in the DBI module before 1.643 for Perl. The hv_fetch() documentation requires checking for NULL and the code does that. But, shortly thereafter, it calls SvOK(profile), causing a NULL pointer dereference. | |||||
| CVE-2020-0432 | 2 Google, Opensuse | 2 Android, Leap | 2022-04-28 | 4.6 MEDIUM | 7.8 HIGH |
| In skb_to_mamac of networking.c, there is a possible out of bounds write due to an integer overflow. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-143560807 | |||||
| CVE-2020-25219 | 5 Canonical, Debian, Fedoraproject and 2 more | 5 Ubuntu Linux, Debian Linux, Fedora and 2 more | 2022-04-28 | 5.0 MEDIUM | 7.5 HIGH |
| url::recvline in url.cpp in libproxy 0.4.x through 0.4.15 allows a remote HTTP server to trigger uncontrolled recursion via a response composed of an infinite stream that lacks a newline character. This leads to stack exhaustion. | |||||
| CVE-2020-25212 | 4 Canonical, Debian, Linux and 1 more | 4 Ubuntu Linux, Debian Linux, Linux Kernel and 1 more | 2022-04-28 | 4.4 MEDIUM | 7.0 HIGH |
| A TOCTOU mismatch in the NFS client code in the Linux kernel before 5.8.3 could be used by local attackers to corrupt memory or possibly have unspecified other impact because a size check is in fs/nfs/nfs4proc.c instead of fs/nfs/nfs4xdr.c, aka CID-b4487b935452. | |||||
| CVE-2020-25284 | 3 Debian, Linux, Opensuse | 3 Debian Linux, Linux Kernel, Leap | 2022-04-28 | 1.9 LOW | 4.1 MEDIUM |
| The rbd block device driver in drivers/block/rbd.c in the Linux kernel through 5.8.9 used incomplete permission checking for access to rbd devices, which could be leveraged by local attackers to map or unmap rbd block devices, aka CID-f44d04e696fe. | |||||
| CVE-2020-25032 | 3 Debian, Flask-cors Project, Opensuse | 4 Debian Linux, Flask-cors, Backports Sle and 1 more | 2022-04-28 | 5.0 MEDIUM | 7.5 HIGH |
| An issue was discovered in Flask-CORS (aka CORS Middleware for Flask) before 3.0.9. It allows ../ directory traversal to access private resources because resource matching does not ensure that pathnames are in a canonical format. | |||||
| CVE-2020-8621 | 5 Canonical, Isc, Netapp and 2 more | 5 Ubuntu Linux, Bind, Steelstore Cloud Integrated Storage and 2 more | 2022-04-28 | 4.3 MEDIUM | 7.5 HIGH |
| In BIND 9.14.0 -> 9.16.5, 9.17.0 -> 9.17.3, If a server is configured with both QNAME minimization and 'forward first' then an attacker who can send queries to it may be able to trigger the condition that will cause the server to crash. Servers that 'forward only' are not affected. | |||||
| CVE-2020-8623 | 7 Canonical, Debian, Fedoraproject and 4 more | 7 Ubuntu Linux, Debian Linux, Fedora and 4 more | 2022-04-28 | 4.3 MEDIUM | 7.5 HIGH |
| In BIND 9.10.0 -> 9.11.21, 9.12.0 -> 9.16.5, 9.17.0 -> 9.17.3, also affects 9.10.5-S1 -> 9.11.21-S1 of the BIND 9 Supported Preview Edition, An attacker that can reach a vulnerable system with a specially crafted query packet can trigger a crash. To be vulnerable, the system must: * be running BIND that was built with "--enable-native-pkcs11" * be signing one or more zones with an RSA key * be able to receive queries from a possible attacker | |||||
| CVE-2020-24614 | 3 Fedoraproject, Fossil-scm, Opensuse | 4 Fedora, Fossil, Backports Sle and 1 more | 2022-04-28 | 6.5 MEDIUM | 8.8 HIGH |
| Fossil before 2.10.2, 2.11.x before 2.11.2, and 2.12.x before 2.12.1 allows remote authenticated users to execute arbitrary code. An attacker must have check-in privileges on the repository. | |||||
| CVE-2020-15683 | 3 Debian, Mozilla, Opensuse | 5 Debian Linux, Firefox, Firefox Esr and 2 more | 2022-04-28 | 7.5 HIGH | 9.8 CRITICAL |
| Mozilla developers and community members reported memory safety bugs present in Firefox 81 and Firefox ESR 78.3. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox ESR < 78.4, Firefox < 82, and Thunderbird < 78.4. | |||||
| CVE-2020-15673 | 3 Debian, Mozilla, Opensuse | 5 Debian Linux, Firefox, Firefox Esr and 2 more | 2022-04-28 | 6.8 MEDIUM | 8.8 HIGH |
| Mozilla developers reported memory safety bugs present in Firefox 80 and Firefox ESR 78.2. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3. | |||||
| CVE-2020-25601 | 4 Debian, Fedoraproject, Opensuse and 1 more | 4 Debian Linux, Fedora, Leap and 1 more | 2022-04-28 | 4.9 MEDIUM | 5.5 MEDIUM |
| An issue was discovered in Xen through 4.14.x. There is a lack of preemption in evtchn_reset() / evtchn_destroy(). In particular, the FIFO event channel model allows guests to have a large number of event channels active at a time. Closing all of these (when resetting all event channels or when cleaning up after the guest) may take extended periods of time. So far, there was no arrangement for preemption at suitable intervals, allowing a CPU to spend an almost unbounded amount of time in the processing of these operations. Malicious or buggy guest kernels can mount a Denial of Service (DoS) attack affecting the entire system. All Xen versions are vulnerable in principle. Whether versions 4.3 and older are vulnerable depends on underlying hardware characteristics. | |||||
| CVE-2020-25599 | 4 Debian, Fedoraproject, Opensuse and 1 more | 4 Debian Linux, Fedora, Leap and 1 more | 2022-04-28 | 4.4 MEDIUM | 7.0 HIGH |
| An issue was discovered in Xen through 4.14.x. There are evtchn_reset() race conditions. Uses of EVTCHNOP_reset (potentially by a guest on itself) or XEN_DOMCTL_soft_reset (by itself covered by XSA-77) can lead to the violation of various internal assumptions. This may lead to out of bounds memory accesses or triggering of bug checks. In particular, x86 PV guests may be able to elevate their privilege to that of the host. Host and guest crashes are also possible, leading to a Denial of Service (DoS). Information leaks cannot be ruled out. All Xen versions from 4.5 onwards are vulnerable. Xen versions 4.4 and earlier are not vulnerable. | |||||
| CVE-2020-25603 | 4 Debian, Fedoraproject, Opensuse and 1 more | 4 Debian Linux, Fedora, Leap and 1 more | 2022-04-28 | 4.6 MEDIUM | 7.8 HIGH |
| An issue was discovered in Xen through 4.14.x. There are missing memory barriers when accessing/allocating an event channel. Event channels control structures can be accessed lockless as long as the port is considered to be valid. Such a sequence is missing an appropriate memory barrier (e.g., smp_*mb()) to prevent both the compiler and CPU from re-ordering access. A malicious guest may be able to cause a hypervisor crash resulting in a Denial of Service (DoS). Information leak and privilege escalation cannot be excluded. Systems running all versions of Xen are affected. Whether a system is vulnerable will depend on the CPU and compiler used to build Xen. For all systems, the presence and the scope of the vulnerability depend on the precise re-ordering performed by the compiler used to build Xen. We have not been able to survey compilers; consequently we cannot say which compiler(s) might produce vulnerable code (with which code generation options). GCC documentation clearly suggests that re-ordering is possible. Arm systems will also be vulnerable if the CPU is able to re-order memory access. Please consult your CPU vendor. x86 systems are only vulnerable if a compiler performs re-ordering. | |||||