CVE-2010-4820: Code Injection
First published: Thu Jan 05 2012(Updated: )
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. (<a href="https://access.redhat.com/security/cve/CVE-2010-4820">CVE-2010-4820</a>) Note: The fix for <a href="https://access.redhat.com/security/cve/CVE-2010-4820">CVE-2010-4820</a> 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).
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Artifex Ghostscript | =8.62 |
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Reference Links
- http://bugs.ghostscript.com/show_bug.cgi?id=691339
- https://bugzilla.redhat.com/show_bug.cgi?id=771853
- https://bugzilla.redhat.com/show_bug.cgi?id=599564
- http://www.securityfocus.com/bid/51847
- http://www.openwall.com/lists/oss-security/2012/01/04/7
- http://www.securityfocus.com/archive/1/511433
- http://rhn.redhat.com/errata/RHSA-2012-0095.html
- http://rhn.redhat.com/errata/RHSA-2012-0096.html
- https://access.redhat.com/security/cve/CVE-2010-4820
- https://access.redhat.com/security/cve/CVE-2010-2055
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=599564
- http://thread.gmane.org/gmane.comp.security.oss.general/2973/focus=3354
- http://svn.ghostscript.com/viewvc?view=rev&revision=11494
- http://cwe.mitre.org/data/definitions/427.html
- https://rhn.redhat.com/errata/RHSA-2012-0096.html
- https://rhn.redhat.com/errata/RHSA-2012-0095.html
Frequently Asked Questions
What is the severity of CVE-2010-4820?
CVE-2010-4820 has been classified as a medium severity vulnerability due to the potential for arbitrary code execution.
How do I fix CVE-2010-4820?
To fix CVE-2010-4820, it is recommended to run Ghostscript with the "-P-" option or update to a patched version of Ghostscript.
What versions of Ghostscript are affected by CVE-2010-4820?
CVE-2010-4820 affects Ghostscript version 8.62.
What kind of attack can be executed via CVE-2010-4820?
CVE-2010-4820 allows an attacker to execute arbitrary PostScript code by placing a specially-crafted library file in a controlled directory.
Can I safely run Ghostscript with the default settings regarding CVE-2010-4820?
Running Ghostscript with default settings is unsafe if the current working directory is controlled by an attacker, due to CVE-2010-4820.
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