Vulnerability 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 Score
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Invisible-Island | Xterm | < 366 |
| Debian | Debian Linux | 9.0 |
| Fedoraproject | Fedora | 33 |
References
- 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/82ba55b8f994ab30ff561a347PatchThird Party Advisory
- https://invisible-island.net/xterm/xterm.log.htmlRelease NotesVendor Advisory
- https://lists.debian.org/debian-lts-announce/2021/02/msg00019.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://news.ycombinator.com/item?id=26524650Issue TrackingThird Party Advisory
- https://security.gentoo.org/glsa/202208-22Third Party Advisory
- https://www.openwall.com/lists/oss-security/2021/02/09/7Mailing ListThird Party Advisory
- https://www.openwall.com/lists/oss-security/2021/02/09/9Mailing ListThird Party Advisory
- http://seclists.org/fulldisclosure/2021/May/52Mailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/02/10/7Mailing ListThird Party Advisory
FAQ
What is CVE-2021-27135?
CVE-2021-27135 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2021-27135?
Check the references section above for vendor advisories and patch information. Affected products include: Invisible-Island Xterm, Debian Debian Linux, Fedoraproject Fedora.