Vulnerability Details : 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.

Vulnerability category: Memory CorruptionExecute codeDenial of service

Published 2021-02-10 16:15:14

Updated 2022-09-30 12:50:07

Source MITRE

View at NVD, CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2021-27135

Probability of exploitation activity in the next 30 days: 3.63%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 91 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2021-27135

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Source
7.5	HIGH	AV:N/AC:L/Au:N/C:P/I:P/A:P	10.0	6.4	[email protected]
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9	[email protected]
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

References for CVE-2021-27135

http://seclists.org/fulldisclosure/2021/May/52

Mailing List;Third Party Advisory

CVEs referencing this url
https://bugzilla.redhat.com/show_bug.cgi?id=1927559

Issue Tracking
http://www.openwall.com/lists/oss-security/2021/02/10/7

Mailing List;Third Party Advisory
https://access.redhat.com/security/cve/CVE-2021-27135

Third Party Advisory
https://www.openwall.com/lists/oss-security/2021/02/09/9

Mailing List;Third Party Advisory
https://news.ycombinator.com/item?id=26524650

Issue Tracking;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/[email protected]/message/35LK2ZXEIJUOGOA7FV2TJL3L6LFJ4X5S/

Mailing List;Patch;Third Party Advisory
https://security.gentoo.org/glsa/202208-22

Third Party Advisory

CVEs referencing this url
https://www.openwall.com/lists/oss-security/2021/02/09/7

Mailing List;Third Party Advisory
https://bugzilla.suse.com/show_bug.cgi?id=1182091

Issue Tracking
https://invisible-island.net/xterm/xterm.log.html

Release Notes;Vendor Advisory

CVEs referencing this url
https://github.com/ThomasDickey/xterm-snapshots/commit/82ba55b8f994ab30ff561a347b82ea340ba7075c

Patch;Third Party Advisory

Products affected by CVE-2021-27135

Debian » Debian Linux » Version: 9.0
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Matching versions
Invisible-island » Xterm
Versions before (<) 366
cpe:2.3:a:invisible-island:xterm:*:*:*:*:*:*:*:*
Matching versions
Fedoraproject » Fedora » Version: 33
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
Matching versions