CVE-2021-27135 Information

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 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

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

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8