CVE-2018-12015

Publication date 7 June 2018

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

In Perl through 5.26.2, the Archive::Tar module allows remote attackers to bypass a directory-traversal protection mechanism, and overwrite arbitrary files, via an archive file containing a symlink and a regular file with the same name.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
perl	18.04 LTS bionic	Fixed 5.26.1-6ubuntu0.1
	17.10 artful	Fixed 5.26.0-8ubuntu1.2
	16.04 LTS xenial	Fixed 5.22.1-9ubuntu0.5
	14.04 LTS trusty	Fixed 5.18.2-2ubuntu1.6

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
perl	Upstream: ae65651

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.5 · High

Base metrics

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

Scores

Parameter	Value
Base score	7.5 · High
Exploitability score	-
Impact score	-

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

References

Related Ubuntu Security Notices (USN)

USN-3684-1
Perl vulnerability
13 June 2018

USN-3684-2
Perl vulnerability
13 June 2018

Other references

https://www.cve.org/CVERecord?id=CVE-2018-12015