CVE-2017-18206 — Improper Restriction of Operations within the Bounds of a Memory Buffer in ZSH

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory BufferCWE-120 — Classic Buffer OverflowCWE-121 — Stack-based Buffer Overflow8 documents7 sources
Severity
9.8CRITICALNVD
OSV7.8
EPSS
0.4%
top 39.51%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
ZSHDebian ZSHCanonical Ubuntu Linux
Timeline
PublishedFeb 27
Latest updateMay 13

Description

In utils.c in zsh before 5.4, symlink expansion had a buffer overflow.

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 3.9 | Impact: 5.9

Affected Packages4 packages

▶NVDzsh/zsh< 5.4
▶debiandebian/zsh< zsh 5.4.1-1 (bookworm)
▶Debianzsh/zsh< 5.4.1-1+3
▶Ubuntuzsh/zsh< 5.0.2-3ubuntu6.1+1

Also affects: Ubuntu Linux 14.04, 16.04, 17.10

Patches

Patch: sourceforge.net ↗Patch: sourceforge.net ↗

🔴Vulnerability Details

3
GHSA
GHSA-vpqc-mgq5-m5xg: In utils↗2022-05-13
▶
OSV
zsh vulnerabilities↗2018-03-08
▶
OSV
CVE-2017-18206: In utils↗2018-02-27
▶

📋Vendor Advisories

3
Ubuntu
Zsh vulnerabilities↗2018-03-08
▶
Red Hat
zsh: buffer overrun in symlinks↗2017-05-09
▶
Debian
CVE-2017-18206: zsh - In utils.c in zsh before 5.4, symlink expansion had a buffer overflow.↗2017
▶

💬Community

1
Bugzilla
CVE-2017-18206 zsh: buffer overrun in symlinks↗2018-02-27
▶