CVE-2021-27135

xterm before Patch #366 allows remote attackers to execute arbitrary code or cause a denial of service (segmentation fault) via a crafted UTF-8 combining character sequence.

CVSS v3.0 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3.0 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:N/C:P/I:P/A:P

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://www.openwall.com/lists/oss-security/2021/02/09/7	Mailing List Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/02/09/9	Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/02/10/7	Mailing List Third Party Advisory
https://lists.debian.org/debian-lts-announce/2021/02/msg00019.html	Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/35LK2ZXEIJUOGOA7FV2TJL3L6LFJ4X5S/	Mailing List Patch Third Party Advisory
https://invisible-island.net/xterm/xterm.log.html	Release Notes Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1927559	Issue Tracking
https://github.com/ThomasDickey/xterm-snapshots/commit/82ba55b8f994ab30ff561a347b82ea340ba7075c	Patch Third Party Advisory
https://news.ycombinator.com/item?id=26524650	Issue Tracking Third Party Advisory
https://access.redhat.com/security/cve/CVE-2021-27135	Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=1182091	Issue Tracking
http://seclists.org/fulldisclosure/2021/May/52	Mailing List Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:invisible-island:xterm:*:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

Configuration 3 (hide)

cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*

Information

Published : 2021-02-10 16:15

Updated : 2022-01-04 16:36

NVD link : CVE-2021-27135

Mitre link : CVE-2021-27135

JSON object : View

Products Affected

fedoraproject

fedora

debian

debian_linux

invisible-island

xterm

CWE

NVD-CWE-noinfo

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://www.openwall.com/lists/oss-security/2021/02/09/7", "name": "https://www.openwall.com/lists/oss-security/2021/02/09/7", "tags": ["Mailing List", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://www.openwall.com/lists/oss-security/2021/02/09/9", "name": "https://www.openwall.com/lists/oss-security/2021/02/09/9", "tags": ["Mailing List", "Third Party Advisory"], "refsource": "MISC"}, {"url": "http://www.openwall.com/lists/oss-security/2021/02/10/7", "name": "[oss-security] 20210210 Re: Re: screen crash processing combining characters", "tags": ["Mailing List", "Third Party Advisory"], "refsource": "MLIST"}, {"url": "https://lists.debian.org/debian-lts-announce/2021/02/msg00019.html", "name": "[debian-lts-announce] 20210213 [SECURITY] [DLA 2558-1] xterm security update", "tags": ["Mailing List", "Third Party Advisory"], "refsource": "MLIST"}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/35LK2ZXEIJUOGOA7FV2TJL3L6LFJ4X5S/", "name": "FEDORA-2021-e7a8e79fa8", "tags": ["Mailing List", "Patch", "Third Party Advisory"], "refsource": "FEDORA"}, {"url": "https://invisible-island.net/xterm/xterm.log.html", "name": "https://invisible-island.net/xterm/xterm.log.html", "tags": ["Release Notes", "Vendor Advisory"], "refsource": "CONFIRM"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=1927559", "name": "https://bugzilla.redhat.com/show_bug.cgi?id=1927559", "tags": ["Issue Tracking"], "refsource": "MISC"}, {"url": "https://github.com/ThomasDickey/xterm-snapshots/commit/82ba55b8f994ab30ff561a347b82ea340ba7075c", "name": "https://github.com/ThomasDickey/xterm-snapshots/commit/82ba55b8f994ab30ff561a347b82ea340ba7075c", "tags": ["Patch", "Third Party Advisory"], "refsource": "CONFIRM"}, {"url": "https://news.ycombinator.com/item?id=26524650", "name": "https://news.ycombinator.com/item?id=26524650", "tags": ["Issue Tracking", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://access.redhat.com/security/cve/CVE-2021-27135", "name": "https://access.redhat.com/security/cve/CVE-2021-27135", "tags": ["Third Party Advisory"], "refsource": "MISC"}, {"url": "https://bugzilla.suse.com/show_bug.cgi?id=1182091", "name": "https://bugzilla.suse.com/show_bug.cgi?id=1182091", "tags": ["Issue Tracking"], "refsource": "CONFIRM"}, {"url": "http://seclists.org/fulldisclosure/2021/May/52", "name": "20210520 CVE-2021-31535 libX11 Insufficient Length Checks PoC and Archeology", "tags": ["Mailing List", "Third Party Advisory"], "refsource": "FULLDISC"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "xterm before Patch #366 allows remote attackers to execute arbitrary code or cause a denial of service (segmentation fault) via a crafted UTF-8 combining character sequence."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2021-27135", "ASSIGNER": "cve@mitre.org"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 7.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "severity": "HIGH", "acInsufInfo": false, "impactScore": 6.4, "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}}, "publishedDate": "2021-02-10T16:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:a:invisible-island:xterm:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "366"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2022-01-04T16:36Z"}