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Category:   Application (Generic)  >   Perl Vendors:   Wall, Larry
Perl Directory Traversal Flaw in Archive::Tar Lets Remote Users Ovewrite Files on the Target System
SecurityTracker Alert ID:  1041048
SecurityTracker URL:  http://securitytracker.com/id/1041048
CVE Reference:   CVE-2018-12015   (Links to External Site)
Date:  Jun 8 2018
Impact:   Modification of user information
Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Perl. A remote user can overwrite files on the target system.

A remote user can create a specially crafted tar archive containing a file and a symbolic link (symlink) with the same name that, when extracted by the target user, will create a file outside of the current working directory. This can be exploited to create or overwrite files on the target system with the privileges of the target user.

The Archive::Tar module is affected.

Jakub Wilk reported this vulnerability.

Impact:   A remote user can overwrite files on the target system.
Solution:   No solution was available at the time of this entry.

The vendor advisory is available at:

https://rt.cpan.org/Public/Bug/Display.html?id=125523

Vendor URL:  perl.org/ (Links to External Site)
Cause:   Access control error, Input validation error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Jun 13 2018 (Ubuntu Issues Fix) Perl Directory Traversal Flaw in Archive::Tar Lets Remote Users Ovewrite Files on the Target System
Ubuntu has issued a fix for Ubuntu Linux 14.04 LTS, 16.04 LTS, 17.10, and 18.04 LTS.
Jun 13 2018 (Ubuntu Issues Fix) Perl Directory Traversal Flaw in Archive::Tar Lets Remote Users Ovewrite Files on the Target System
Ubuntu has issued a fix for Ubuntu Linux 12.04 ESM.
Jul 19 2018 (OpenBSD Issues Fix) Perl Directory Traversal Flaw in Archive::Tar Lets Remote Users Ovewrite Files on the Target System
OpenBSD has issued a fix for OpenBSD 6.2 and 6.3.



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