CVE-2017-18205 — NULL Pointer Dereference in Project ZSH

CWE-476 — NULL Pointer DereferenceCWE-665 — Improper Initialization8 documents7 sources
Severity
8.1HIGHNVD
OSV7.8
EPSS
0.7%
top 28.62%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
ZSHZSH Project ZSHDebian ZSH
Timeline
PublishedFeb 27
Latest updateMay 14

Description

In builtin.c in zsh before 5.4, when sh compatibility mode is used, there is a NULL pointer dereference during processing of the cd command with no argument if HOME is not set.

CVSS vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 2.2 | Impact: 5.9

Affected Packages4 packages

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

Patches

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

🔴Vulnerability Details

3
GHSA
GHSA-r2ph-r5g8-q5vv: In builtin↗2022-05-14
▶
OSV
zsh vulnerabilities↗2018-03-08
▶
OSV
CVE-2017-18205: In builtin↗2018-02-27
▶

📋Vendor Advisories

3
Ubuntu
Zsh vulnerabilities↗2018-03-08
▶
Red Hat
zsh: NULL dereference in cd in sh compatibility mode under given circumstances↗2017-06-13
▶
Debian
CVE-2017-18205: zsh - In builtin.c in zsh before 5.4, when sh compatibility mode is used, there is a N...↗2017
▶

💬Community

1
Bugzilla
CVE-2017-18205 zsh: NULL dereference in cd in sh compatibility mode under given circumstances↗2018-02-27
▶