Bug 1223341 (CVE-2015-4035)

Summary:	CVE-2015-4035 xzgrep: incorrect parsing of filenames containing a semicolon
Product:	[Other] Security Response	Reporter:	Martin Prpič <mprpic>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	novyjindrich, praiskup, rjones
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
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.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-06-11 21:04:06 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	1223342

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 1 Stefan Cornelius 2015-06-02 11:07:52 UTC

Upstream patch:

http://git.tukaani.org/?p=xz.git;a=commitdiff;h=f4b2b52624b802c786e4e2a8eb6895794dd93b24

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/.

Comment 3 Product Security DevOps Team 2021-06-11 21:04:06 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2015-4035