Bug 771853 (CVE-2010-4820)

Summary:	CVE-2010-4820 ghostscript: CWD included in the default library search path
Product:	[Other] Security Response	Reporter:	Ramon de C Valle <rcvalle>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bressers, rcvalle, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2012-02-14 13:55:26 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:	755923, 755924, 755925, 755926, 755928
Bug Blocks:	733386

Description Ramon de C Valle 2012-01-05 09:08:30 UTC

Ghostscript included the current working directory in its library search path by default. If a user ran Ghostscript without the "-P-" option in an attacker-controlled directory containing a specially-crafted PostScript library file, it could cause Ghostscript to execute arbitrary PostScript code. With this update, Ghostscript no longer searches the current working directory for library files by default. (CVE-2010-4820)

Note: The fix for CVE-2010-4820 could possibly break existing configurations. To use the previous, vulnerable behavior, run Ghostscript with the "-P" option (to always search the current working directory first).

Comment 1 Tomas Hoger 2012-01-08 13:24:21 UTC

This issue was originally tracked with CVE-2010-2055 via bug #599564.  It got a separate CVE id, as it is separate issue, see e.g.:
  http://thread.gmane.org/gmane.comp.security.oss.general/2973/focus=3354

Issue was tracked upstream in:
  http://bugs.ghostscript.com/show_bug.cgi?id=691339

Following upstream commit changes ghostscript's default to not include CWD in the library search path by default (SEARCH_HERE_FIRST=0 if the default now):
  http://svn.ghostscript.com/viewvc?view=rev&revision=11494

Flaw type:
  CWE-427: Uncontrolled Search Path Element
  http://cwe.mitre.org/data/definitions/427.html

Comment 2 errata-xmlrpc 2012-02-02 22:33:22 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 4

Via RHSA-2012:0096 https://rhn.redhat.com/errata/RHSA-2012-0096.html

Comment 3 errata-xmlrpc 2012-02-02 22:46:00 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5
  Red Hat Enterprise Linux 6

Via RHSA-2012:0095 https://rhn.redhat.com/errata/RHSA-2012-0095.html