Vulnerability Details : 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.
Vulnerability category: Memory CorruptionExecute codeDenial of service
Products affected by CVE-2021-27135
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
- cpe:2.3:a:invisible-island:xterm:*:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-27135
0.63%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 68 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-27135
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
7.5
|
HIGH | AV:N/AC:L/Au:N/C:P/I:P/A:P |
10.0
|
6.4
|
NIST | |
|
9.8
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
3.9
|
5.9
|
NIST |
References for CVE-2021-27135
-
http://seclists.org/fulldisclosure/2021/May/52
Full Disclosure: CVE-2021-31535 libX11 Insufficient Length Checks PoC and ArcheologyMailing List;Third Party Advisory
-
https://bugzilla.redhat.com/show_bug.cgi?id=1927559
1927559 – (CVE-2021-27135) CVE-2021-27135 xterm: crash when processing combining charactersIssue Tracking
-
http://www.openwall.com/lists/oss-security/2021/02/10/7
oss-security - Re: Re: screen crash processing combining charactersMailing List;Third Party Advisory
-
https://access.redhat.com/security/cve/CVE-2021-27135
CVE-2021-27135- Red Hat Customer PortalThird Party Advisory
-
https://www.openwall.com/lists/oss-security/2021/02/09/9
oss-security - Re: screen crash processing combining charactersMailing List;Third Party Advisory
-
https://news.ycombinator.com/item?id=26524650
CVE-2021-27135: xterm flaw may allow remote code execution, CVSS 9.6 | Hacker NewsIssue Tracking;Third Party Advisory
-
https://lists.debian.org/debian-lts-announce/2021/02/msg00019.html
[SECURITY] [DLA 2558-1] xterm security updateMailing List;Third Party Advisory
-
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/35LK2ZXEIJUOGOA7FV2TJL3L6LFJ4X5S/
[SECURITY] Fedora 33 Update: xterm-366-1.fc33 - package-announce - Fedora Mailing-ListsMailing List;Patch;Third Party Advisory
-
https://security.gentoo.org/glsa/202208-22
xterm: Multiple Vulnerabilities (GLSA 202208-22) — Gentoo securityThird Party Advisory
-
https://www.openwall.com/lists/oss-security/2021/02/09/7
oss-security - Re: screen crash processing combining charactersMailing List;Third Party Advisory
-
https://bugzilla.suse.com/show_bug.cgi?id=1182091
Bug 1182091 – VUL-0: CVE-2021-27135: xterm: crash when processing combining charactersIssue Tracking
-
https://invisible-island.net/xterm/xterm.log.html
XTERM - Change LogRelease Notes;Vendor Advisory
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https://github.com/ThomasDickey/xterm-snapshots/commit/82ba55b8f994ab30ff561a347b82ea340ba7075c
snapshot of project "xterm", label xterm-365d · ThomasDickey/xterm-snapshots@82ba55b · GitHubPatch;Third Party Advisory
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