Critical severity · published Feb 27, 2018
CVE-2017-18206
In utils.c in zsh before 5.4, symlink expansion had a buffer overflow
9.8
CVSS
3.1%
EPSS
No
On KEV
Description
In utils.c in zsh before 5.4, symlink expansion had a buffer overflow.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.1% · higher than 88% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UL
Ubuntu Linux · Canonical
14.04; 16.04; 17.10 · source: NVD
ZS
Zsh · Zsh
before 5.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-18206
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-18206
Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:1932
Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3073
lists.debian.org
https://lists.debian.org/debian-lts-announce/2020/12/msg00000.html
Third Party Advisory
https://security.gentoo.org/glsa/201805-10
Patch
https://sourceforge.net/p/zsh/code/ci/c7a9cf465dd620ef48d586026944d9bd7a0d5d6d
Third Party Advisory
https://usn.ubuntu.com/3593-1/
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