CVE-2021-27135
CRITICALCVSS 9.8/10EPSS 7.54%
Last modified
CVE-2021-27135 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 7.54% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Invisible-Island | Xterm | < 366 |
| Debian | Debian Linux | 9.0 |
| Fedoraproject | Fedora | 33 |
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://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://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
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is 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.
How severe is CVE-2021-27135?
CVE-2021-27135 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 7.54% probability of exploitation in the next 30 days.
How do I fix CVE-2021-27135?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
Are you affected by CVE-2021-27135?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST