Bug 1223341 (CVE-2015-4035) - CVE-2015-4035 xzgrep: incorrect parsing of filenames containing a semicolon
Summary: CVE-2015-4035 xzgrep: incorrect parsing of filenames containing a semicolon
Keywords:
Status: NEW
Alias: CVE-2015-4035
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard: impact=moderate,public=20150518,repor...
Depends On:
Blocks: 1223342
TreeView+ depends on / blocked
 
Reported: 2015-05-20 11:28 UTC by Martin Prpič
Modified: 2019-06-08 20:36 UTC (History)
3 users (show)

Fixed In Version: xz 5.0.0, xz 5.2.0
Doc Type: Bug Fix
Doc Text:
It was discovered that the xzgrep's xz helper script did not properly sanitize certain file names. A local attacker could use this flaw to inject and execute arbitrary commands by tricking a user into running the xzgrep script on a file with a specially crafted file name.
Clone Of:
Environment:
Last Closed:


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Description Martin Prpič 2015-05-20 11:28:21 UTC
It was found that xzgrep did not correctly process file names containing a semicolon. A local attacker able to trick a user to run xzgrep on a specially crafted file could use this flaw to execute arbitrary code as the user running xzgrep.

$ touch /tmp/semi\;colon
$ xzgrep anystring /tmp/semi\;colon 
xz: /tmp/semi: No such file or directory
/usr/bin/xzgrep: line 199: colon: command not found

Additional details:

http://seclists.org/oss-sec/2015/q2/484

Comment 2 Stefan Cornelius 2015-06-03 07:11:00 UTC
Statement:

This issue affects the versions of xz as shipped with Red Hat Enterprise Linux 5 and 6. Red Hat Product Security has rated this issue as having Moderate security impact. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.


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