Home/CVE/xterm before Patch #366 allows remote attackers to execute arbitrary code or cause a denial of service (segmentation fau
CVE

CVE-2021-27135

xterm before Patch #366 allows remote attackers to execute arbitrary code or cause a denial of service (segmentation fau

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 · CVSS 9.8 EPSS 0.00722
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules1 YARA rules0
▤

Affected Products & Versions

3
invisible-island xterm< 366
debian linuxall versions
fedoraproject fedoraall versions
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumPotential Xterm Reverse Shell
▣

Scoring & Timeline

9.8
CRITICAL · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD10 Feb 2021 · 04:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

13
suse-csafopenSUSE-SU-2024:11527-1
msrcCVE-2021-27135
suse-csafopenSUSE-SU-2021:2011-1
suse-csafopenSUSE-SU-2021:0900-1
suse-csafSUSE-SU-2021:2011-1
🔗

References & Sources

13
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://seclists.org/fulldisclosure/2021/May/52Mailing ListThird Party Advisory
http://www.openwall.com/lists/oss-security/2021/02/10/7Mailing ListThird 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/82ba55b8f994ab30ff561a347b82ea340ba7075cPatchThird Party Advisory
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