GLSA 201903-05: Tar: Denial of Service

http://security.gentoo.org/

Severity:	normal
Title:	Tar: Denial of Service
Date:	03/10/2019
Bugs:	#674210
ID:	201903-05

Synopsis

A vulnerability in Tar could led to a Denial of Service condition.

Background

The Tar program provides the ability to create and manipulate tar archives.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
app-arch/tar	< 1.30-r1	>= 1.30-r1	All supported architectures

Description

The sparse_dump_region function in sparse.c file in Tar allows an infinite loop using the --sparse option.

Impact

A local attacker could cause a Denial of Service condition by modifying a file that is supposed to be archived by a different user’s process (e.g., a system backup running as root).

Workaround

There is no known workaround at this time.

Resolution

All Tar users should upgrade to the latest version:

      # emerge --sync
      # emerge --ask --oneshot --verbose ">=app-arch/tar-1.30-r1"

References

CVE-2018-20482

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201903-05.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.