CVE-2017-18206

Publication date 27 February 2018

Last updated 25 August 2025

Ubuntu priority

Why this priority?

Cvss 3 Severity Score

Score breakdown

Description

In utils.c in zsh before 5.4, symlink expansion had a buffer overflow.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
zsh	17.10 artful	Fixed 5.2-5ubuntu1.1
	16.04 LTS xenial	Fixed 5.1.1-1ubuntu2.1
	14.04 LTS trusty	Not in release

Severity score breakdown

CVSS version: CVSS v3.0

Base score 9.8 · Critical

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality impact	High
Integrity impact	High
Availability impact	High

Scores

Parameter	Value
Base score	9.8 · Critical
Exploitability score	-
Impact score	-

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-3593-1
Zsh vulnerabilities
8 March 2018

Other references

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