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[ GLSA 201402-19 ] libtar: Arbitraty code execution
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PostPosted: Fri Feb 21, 2014 8:26 am    Post subject: [ GLSA 201402-19 ] libtar: Arbitraty code execution Reply with quote

Gentoo Linux Security Advisory

Title: libtar: Arbitraty code execution (GLSA 201402-19)
Severity: normal
Exploitable: remote
Date: February 21, 2014
Bug(s): #487420
ID: 201402-19

Synopsis

A buffer overflow in libtar might allow remote attackers to execute
arbitrary code or cause a Denial of Service condition.


Background

libtar is a C library for manipulating POSIX tar files.

Affected Packages

Package: dev-libs/libtar
Vulnerable: < 1.2.20-r2
Unaffected: >= 1.2.20-r2
Architectures: All supported architectures


Description

An integer overflow error within the “th_read()” function when
processing long names or link extensions can be exploited to cause a
heap-based buffer overflow via a specially crafted archive.


Impact

A remote attacker could entice a user to open a specially crafted file
using a program linked against libtar, possibly resulting in execution of
arbitrary code with the privileges of the process or a Denial of Service
condition.


Workaround

There is no known workaround at this time.

Resolution

All libtar users should upgrade to the latest version:
Code:
# emerge --sync
      # emerge --ask --oneshot --verbose ">=dev-libs/libtar-1.2.20-r2"
   


References

CVE-2013-4397
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