CVE catalog
CVE-2017-18206
zsh: CVE-2017-18206
- Severity
- High · CVSS 7.5
CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 3.11% · Oct 27, 2026
In utils.c in zsh before 5.4, symlink expansion had a buffer overflow.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | zsh | sid | 5.9.2-1 | fixed |
| Debian | zsh | forky | 5.9.2-1 | fixed |
| Debian | zsh | trixie | 5.9-8 | fixed |
| Debian | zsh | bookworm | 5.9-4 | fixed |
| Ubuntu | zsh | 16.04 | 5.1.1-1ubuntu1 | vulnerable |
| Ubuntu | zsh | 16.04 | 5.1.1-1ubuntu2 | vulnerable |
| Ubuntu | zsh | 16.04 | 5.1.1-1ubuntu2.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | zsh | source | sid | 5.4.1-1 | not yet assigned | Not reported | Not reported |
| Debian | zsh | source | forky | 5.4.1-1 | not yet assigned | Not reported | Not reported |
| Debian | zsh | source | trixie | 5.4.1-1 | not yet assigned | Not reported | Not reported |
| Debian | zsh | source | bookworm | 5.4.1-1 | not yet assigned | Not reported | Not reported |
| Ubuntu | zsh | deb | 16.04 | 5.1.1-1ubuntu2.1 | Not reported | UBUNTU-CVE-2017-18206 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [zsh]Fixed
Source package: [zsh]
Details (2)
5.9-4+b15· amd64 · bookwormFixed · Fixed:
5.4.1-1dsa · zsh · debian · bookworm; dsa · zsh · debian · 12
5.9-4+b15· arm64 · bookwormFixed · Fixed:
5.4.1-1dsa · zsh · debian · bookworm; dsa · zsh · debian · 12
- [zsh-common]Fixed
Source package: [zsh]
Details (2)
5.9-4· all · bookwormFixed · Fixed:
5.4.1-1dsa · zsh · debian · bookworm; dsa · zsh · debian · 12
5.9-4· all · bookwormFixed · Fixed:
5.4.1-1dsa · zsh · debian · bookworm; dsa · zsh · debian · 12
- [zsh-dev]Fixed
Source package: [zsh]
Details (2)
5.9-4+b15· amd64 · bookwormFixed · Fixed:
5.4.1-1dsa · zsh · debian · bookworm; dsa · zsh · debian · 12
5.9-4+b15· arm64 · bookwormFixed · Fixed:
5.4.1-1dsa · zsh · debian · bookworm; dsa · zsh · debian · 12
- [zsh-doc]Fixed
Source package: [zsh]
Details (2)
5.9-4· all · bookwormFixed · Fixed:
5.4.1-1dsa · zsh · debian · bookworm; dsa · zsh · debian · 12
5.9-4· all · bookwormFixed · Fixed:
5.4.1-1dsa · zsh · debian · bookworm; dsa · zsh · debian · 12
- [zsh-static]Fixed
Source package: [zsh]
Details (2)
5.9-4+b15· amd64 · bookwormFixed · Fixed:
5.4.1-1dsa · zsh · debian · bookworm; dsa · zsh · debian · 12
5.9-4+b15· arm64 · bookwormFixed · Fixed:
5.4.1-1dsa · zsh · debian · bookworm; dsa · zsh · debian · 12
[Debian 13 (Trixie)]
- [zsh]Fixed
Source package: [zsh]
Details (2)
5.9-8+b23· amd64 · trixieFixed · Fixed:
5.4.1-1dsa · zsh · debian · 13
5.9-8+b23· arm64 · trixieFixed · Fixed:
5.4.1-1dsa · zsh · debian · 13
- [zsh-common]Fixed
Source package: [zsh]
Details (2)
5.9-8· all · trixieFixed · Fixed:
5.4.1-1dsa · zsh · debian · 13
5.9-8· all · trixieFixed · Fixed:
5.4.1-1dsa · zsh · debian · 13
- [zsh-dev]Fixed
Source package: [zsh]
Details (2)
5.9-8+b23· amd64 · trixieFixed · Fixed:
5.4.1-1dsa · zsh · debian · 13
5.9-8+b23· arm64 · trixieFixed · Fixed:
5.4.1-1dsa · zsh · debian · 13
- [zsh-doc]Fixed
Source package: [zsh]
Details (2)
5.9-8· all · trixieFixed · Fixed:
5.4.1-1dsa · zsh · debian · 13
5.9-8· all · trixieFixed · Fixed:
5.4.1-1dsa · zsh · debian · 13
- [zsh-static]Fixed
Source package: [zsh]
Details (2)
5.9-8+b23· amd64 · trixieFixed · Fixed:
5.4.1-1dsa · zsh · debian · 13
5.9-8+b23· arm64 · trixieFixed · Fixed:
5.4.1-1dsa · zsh · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2018_3073.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2017-18206]
- [https://osv.dev/vulnerability/DLA-2470-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2017-18206]
- [https://security-tracker.debian.org/tracker/CVE-2017-18206]
- [https://security.access.redhat.com/data/csaf/v2/vex/2017/cve-2017-18206.json]
[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]