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CVE-2016-6321

Published: 28 October 2016

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.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
tar
Launchpad, Ubuntu, Debian
precise
Released (1.26-4ubuntu1.1)
trusty
Released (1.27.1-1ubuntu0.1)
upstream
Released (1.29b-1.1)
xenial
Released (1.28-2.1ubuntu0.1)
yakkety
Released (1.29b-1ubuntu0.1)
zesty Not vulnerable
(1.29b-1.1)
Patches:
upstream: http://git.savannah.gnu.org/cgit/tar.git/commit/?id=7340f67b9860ea0531c1450e5aa261c50f67165d
other: https://sintonen.fi/advisories/tar-extract-pathname-bypass.patch

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact High
Availability impact None
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N