Improper input validation in Zsh
CVE-2018-7549
In params.c in zsh through 5.4.2, there is a crash during a copy of an empty hash table, as demonstrated by typeset -p.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.026 (84.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 84.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.026 · newest: 0.026 · change: 0.000
Affected products
- Zsh
- Canonical Ubuntu Linux — versions 14.04, 16.04, 17.10
- Red Hat Enterprise Linux Desktop — versions 7.0
- Red Hat Enterprise Linux Server — versions 7.0
- Red Hat Enterprise Linux Workstation — versions 7.0
Weakness classification (CWE)
References
- usn.ubuntu.com/3593-1/ (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/201805-10 (vendor-advisory, Third Party Advisory)
- sourceforge.net/p/zsh/code/ci/c2cc8b0fbefc9868fa83537f5b6d90fc1ec438dd (Patch, Third Party Advisory)
- access.redhat.com/errata/RHSA-2018:3073 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2018-7549?
- CVE-2018-7549 is a high-severity vulnerability in Zsh, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2018-02-27.
- How severe is CVE-2018-7549?
- High severity. CVSS v3 base score is 7.5 out of 10.