VulnerabilityModified
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.
CRITICAL 9.8EPSS 7.84%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (7.84%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 7.84% probability · 94th percentile
- CISA KEV
- Not listed
- Affected
- invisible-island/xterm · debian/debian linux · fedoraproject/fedora
- Source
- cve@mitre.org
References
- http://seclists.org/fulldisclosure/2021/May/52Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/02/10/7Mailing List, Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2021-27135Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1927559Issue Tracking
- https://bugzilla.suse.com/show_bug.cgi?id=1182091Issue Tracking
- https://github.com/ThomasDickey/xterm-snapshots/commit/82ba55b8f994ab30ff561a347b82ea340ba7075cPatch, Third Party Advisory
- https://invisible-island.net/xterm/xterm.log.htmlRelease Notes, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/02/msg00019.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/35LK2ZXEIJUOGOA7FV2TJL3L6LFJ4X5S/
- https://news.ycombinator.com/item?id=26524650Issue Tracking, Third Party Advisory
- https://security.gentoo.org/glsa/202208-22Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/02/09/7Mailing List, Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/02/09/9Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2021/May/52Mailing List, Third Party Advisory
- http://www.openwall.com/lists/oss-security/2021/02/10/7Mailing List, Third Party Advisory
- https://access.redhat.com/security/cve/CVE-2021-27135Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1927559Issue Tracking
- https://bugzilla.suse.com/show_bug.cgi?id=1182091Issue Tracking
- https://github.com/ThomasDickey/xterm-snapshots/commit/82ba55b8f994ab30ff561a347b82ea340ba7075cPatch, Third Party Advisory
- https://invisible-island.net/xterm/xterm.log.htmlRelease Notes, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/02/msg00019.htmlMailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/35LK2ZXEIJUOGOA7FV2TJL3L6LFJ4X5S/
- https://news.ycombinator.com/item?id=26524650Issue Tracking, Third Party Advisory
- https://security.gentoo.org/glsa/202208-22Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/02/09/7Mailing List, Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/02/09/9Mailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.