CVE-2017-18205

HIGH

zsh < 5.4 - NULL Pointer Dereference via cd Command with Unset HOME

Title source: llm
STIX 2.1

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.

References (4)

Core 4
Core References
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/3593-1/
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/201805-10
Vendor Advisory vendor-advisory x_refsource_redhat
https://access.redhat.com/errata/RHSA-2018:3073

Scores

CVSS v3 8.1
EPSS 0.0212
EPSS Percentile 79.6%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Details

CWE
CWE-476
Status published
Products (1)
zsh_project/zsh < 5.4
Published Feb 27, 2018
Tracked Since Feb 18, 2026