CVE-2017-18206: canonical ubuntu_linux
CVSS: 9.8v3.0CriticalModified
AliasesUBUNTU-CVE-2017-18206DEBIAN-CVE-2017-18206
Published 27-02-2018Last modified 05-08-2024
Vulnerability summary
CVE-2017-18206 is a critical (CVSS 9.8) vulnerability in canonical ubuntu_linux. EPSS estimates a 3.11% chance of exploitation in the next 30 days, higher than 87.7% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.0 (NVD)EPSS score
3.11%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 8 · Related 3Timeline
- 27-02-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
In utils.c in zsh before 5.4, symlink expansion had a buffer overflow.
CVSS metrics
4 scores · 3 sources · 2 versionsCritical 9.8Preferred score · NVD (NIST)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
3.11%
Chance of exploitation in the next 30 days
Percentile
88%
Versus all other CVEs
30-day change
0.00 pp
From 3.11% on 22-09-2026
22-09-202622-10-2026
EPSS score3.11%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 17.10
Debian1 product
- zsh< 5.4.1-1
Ubuntu1 product
- zsh< 5.1.1-1ubuntu2.1
Zsh1 product
- zsh< 5.4
4 vendors · 4 products
References
10 links- sourceforge.net/p/zsh/code/ci/c7a9cf465dd620ef48d586026944d9bd7a0d5d6dX Refsource MISCPatchThird Party AdvisoryREPORT
