CVE-2021-27135

Description

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.

9.8

CVSS

Severity: Critical

CVSS 3.1 •

CVSS 2.0 •

EPSS 0.63%

Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org Vendor Advisory invisible-island.net

Affected: n/a n/a

References

Link	Tags
https://www.openwall.com/lists/oss-security/2021/02/09/7	third party advisory mailing list
https://www.openwall.com/lists/oss-security/2021/02/09/9	third party advisory mailing list
http://www.openwall.com/lists/oss-security/2021/02/10/7	third party advisory mailing list
https://lists.debian.org/debian-lts-announce/2021/02/msg00019.html	third party advisory mailing list
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/35LK2ZXEIJUOGOA7FV2TJL3L6LFJ4X5S/	vendor 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.redhat.com/show_bug.cgi?id=1927559	issue tracking
https://invisible-island.net/xterm/xterm.log.html	release notes vendor advisory
https://github.com/ThomasDickey/xterm-snapshots/commit/82ba55b8f994ab30ff561a347b82ea340ba7075c	third party advisory patch
https://bugzilla.suse.com/show_bug.cgi?id=1182091	issue tracking
http://seclists.org/fulldisclosure/2021/May/52	third party advisory mailing list
https://security.gentoo.org/glsa/202208-22	third party advisory vendor advisory

Frequently Asked Questions

What is the severity of CVE-2021-27135?: CVE-2021-27135 has been scored as a critical severity vulnerability.
How to fix CVE-2021-27135?: To fix CVE-2021-27135, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-27135 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2021-27135 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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