CVE-2021-27135 — Out-of-bounds Write in Xterm

CWE-787 — Out-of-bounds Write8 documents8 sources
Severity
9.8CRITICALNVD
EPSS
1.8%
top 17.05%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Invisible-island XtermDebian LinuxFedoraproject Fedora
Timeline
PublishedFeb 10
Latest updateMay 24

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 vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages2 packages

▶Debianinvisible-island/xterm< 366-1+3

Also affects: Debian Linux 9.0, Fedora 33

Patches

Patch: github.com ↗Patch: github.com ↗

🔴Vulnerability Details

3
GHSA
GHSA-3w4p-5chr-2r8f: xterm through Patch #365 allows remote attackers to cause a denial of service (segmentation fault) or possibly have unspecified other impact via a cra↗2022-05-24
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CVEList
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 combin↗2021-02-10
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OSV
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 combin↗2021-02-10
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📋Vendor Advisories

4
Ubuntu
xterm vulnerability↗2021-02-24
▶
Red Hat
xterm: crash when processing combining characters↗2021-02-10
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Microsoft
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.↗2021-02-09
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Debian
CVE-2021-27135: xterm - xterm before Patch #366 allows remote attackers to execute arbitrary code or cau...↗2021
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CVE-2021-27135 — Out-of-bounds Write in Xterm | cvebase