REDHAT-BUG-554418
First published: Mon Jan 11 2010(Updated: )
An integer underflow leading to array index error was found in the way gzip used to decompress files / archives, compressed with the Lempel–Ziv–Welch (LZW) compression algorithm. A remote attacker could provide a specially-crafted LZW compressed gzip archive, which once decompressed by a local, unsuspecting user would lead to gzip crash, or, potentially to arbitrary code execution with the privileges of the user running gzip. Upstream patch: --------------- <a href="http://git.savannah.gnu.org/cgit/gzip.git/commit/?id=a3db5806d012082b9e25cc36d09f19cd736a468f">http://git.savannah.gnu.org/cgit/gzip.git/commit/?id=a3db5806d012082b9e25cc36d09f19cd736a468f</a> Acknowledgements: Red Hat would like to thank Aki Helin of the Oulu University Secure Programming Group for responsibly reporting this flaw.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| gzip |
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Reference Links
- http://git.savannah.gnu.org/cgit/gzip.git/commit/?id=a3db5806d012082b9e25cc36d09f19cd736a468f
- https://rhn.redhat.com/errata/RHSA-2010-0061.html
- http://admin.fedoraproject.org/updates/gzip-1.3.12-14.fc12
- http://admin.fedoraproject.org/updates/gzip-1.3.12-10.fc11
- https://bugzilla.redhat.com/show_bug.cgi?id=554418
Frequently Asked Questions
What is the severity of REDHAT-BUG-554418?
REDHAT-BUG-554418 is classified as a moderate vulnerability due to potential remote code execution risks.
How do I fix REDHAT-BUG-554418?
To fix REDHAT-BUG-554418, update the GNU gzip package to the latest version available from your distribution's package manager.
What causes REDHAT-BUG-554418?
REDHAT-BUG-554418 is caused by an integer underflow in gzip during the decompression of specially-crafted LZW compressed files.
Who is affected by REDHAT-BUG-554418?
Users of GNU gzip who decompress LZW compressed gzip archives are affected by REDHAT-BUG-554418.
Is REDHAT-BUG-554418 exploitable?
Yes, REDHAT-BUG-554418 is exploitable if a user decompresses a maliciously crafted LZW compressed gzip file.
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