Vulnerability CVE-2016-6321
Published: 2016-12-09   Modified: 2016-12-10

Description:
Directory traversal vulnerability in the safer_name_suffix function in GNU tar 1.14 through 1.29 might allow remote attackers to bypass an intended protection mechanism and write to arbitrary files via vectors related to improper sanitization of the file_name parameter, aka POINTYFEATHER.

See advisories in our WLB2 database:
Topic
Author
Date
Low
GNU tar 1.29 Extract Pathname Bypass
Harry Sintonen
29.10.2016

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None
Affected software
GNU -> TAR 

 References:
http://git.savannah.gnu.org/cgit/tar.git/commit/?id=7340f67b9860ea0531c1450e5aa261c50f67165d
http://lists.gnu.org/archive/html/bug-tar/2016-10/msg00016.html
http://packetstormsecurity.com/files/139370/GNU-tar-1.29-Extract-Pathname-Bypass.html
http://seclists.org/fulldisclosure/2016/Oct/102
http://seclists.org/fulldisclosure/2016/Oct/96
http://www.debian.org/security/2016/dsa-3702
http://www.securityfocus.com/bid/93937
http://www.ubuntu.com/usn/USN-3132-1
https://security.gentoo.org/glsa/201611-19
https://sintonen.fi/advisories/tar-extract-pathname-bypass.proper.txt
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