Vulnerability Report

CVE-2021-27135

RCE

Title: xterm RCE/DoS via crafted UTF-8 combining character sequence

RCE/DoS

Proof Of Concept

No public PoC currently indexed for CVE-2021-27135.

CWE Category NVD-CWE-noinfo
Published Date Feb 10, 2021
Modified Date Nov 21, 2024
Exploit Status Not Found
Score 9.8 CVSS v3.1
Exploit Probability (EPSS)
7.54%

Vulnerability Summary

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.

Impacted Vendors

I
invisible-island 1
X
x.org 1
X
xterm 1

Reference Links

http://seclists.org/fulldisclosure/2021/May/52 http://www.openwall.com/lists/oss-security/2021/02/10/7 https://access.redhat.com/security/cve/CVE-2021-27135 https://bugzilla.redhat.com/show_bug.cgi?id=1927559 https://bugzilla.suse.com/show_bug.cgi?id=1182091 https://github.com/ThomasDickey/xterm-snapshots/commit/82ba55b8f994ab30ff561a347b82ea340ba7075c https://invisible-island.net/xterm/xterm.log.html https://lists.debian.org/debian-lts-announce/2021/02/msg00019.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/35LK2ZXEIJUOGOA7FV2TJL3L6LFJ4X5S/ https://news.ycombinator.com/item?id=26524650 https://security.gentoo.org/glsa/202208-22 https://www.openwall.com/lists/oss-security/2021/02/09/7 https://www.openwall.com/lists/oss-security/2021/02/09/9 http://seclists.org/fulldisclosure/2021/May/52 http://www.openwall.com/lists/oss-security/2021/02/10/7 https://access.redhat.com/security/cve/CVE-2021-27135 https://bugzilla.redhat.com/show_bug.cgi?id=1927559 https://bugzilla.suse.com/show_bug.cgi?id=1182091 https://github.com/ThomasDickey/xterm-snapshots/commit/82ba55b8f994ab30ff561a347b82ea340ba7075c https://invisible-island.net/xterm/xterm.log.html https://lists.debian.org/debian-lts-announce/2021/02/msg00019.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/35LK2ZXEIJUOGOA7FV2TJL3L6LFJ4X5S/ https://news.ycombinator.com/item?id=26524650 https://security.gentoo.org/glsa/202208-22 https://www.openwall.com/lists/oss-security/2021/02/09/7 https://www.openwall.com/lists/oss-security/2021/02/09/9
CVSS v3.1
Source Entity [email protected]
Severity CRITICAL
9.8
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v2.0
Source Entity [email protected]
Severity HIGH
7.5
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:L/Au:N/C:P/I:P/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2021-27135 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Stack

No specific products linked.