libtar <= 1.2.19 Integer overflow

2013-10-10 / 2013-10-20

Credit: Huzaifa Sidhpurwala

Risk: Medium

Local: Yes

Remote: No

CVE: CVE-2013-4397

CWE: CWE-189

CVSS Base Score: 6.8/10

Impact Subscore: 6.4/10

Exploitability Subscore: 8.6/10

Exploit range: Remote

Attack complexity: Medium

Authentication: No required

Confidentiality impact: Partial

Integrity impact: Partial

Availability impact: Partial

Forwarding information from the linux-distros list to oss-sec, since
the issue is public now

Details:

An integer overflow vulnerability was identified in libtar 1.2.19 (and
olders) that can possibly be exploited for arbitrary code execution when
extracting a specially crafted tar file.

A coordinated release date (CRD) of October 9th has been agreed with
Chris Frey (libtar developer).

This issue is assigned CVE-2013-4397.
This issue is fixed in libtar-1.2.20

Reference:

Upstream patch:
http://repo.or.cz/w/libtar.git/commit/45448e8bae671c2f7e80b860ae0fc0cedf2bdc04

Announcement: This is an announcement about the release on
libtar list, but strangely i cant access the list archives.
(i am subscribed to the mailing list though)

Red Hat bugzilla:
https://bugzilla.redhat.com/show_bug.cgi?id=1014492

References:

https://bugzilla.redhat.com/show_bug.cgi?id=1014492

http://repo.or.cz/w/libtar.git/commit/45448e8bae671c2f7e80b860ae0fc0cedf2bdc04

http://seclists.org/oss-sec/2013/q4/52

See this note in RAW Version

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libtar <= 1.2.19 Integer overflow

References:

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