Technical Description

Two vulnerabilities have been identified in Perlbal, which could be exploited by attackers to cause a denial of service or gain knowledge of sensitive information.

The first issue is caused by errors in the "lib/Perlbal/ClientProxy.pm" file when processing zero byte chunked uploads while buffered uploads are enabled, which could be exploited by attackers to crash an affected application, creating a denial of service condition.

The second vulnerability is caused by an input validation error in the "_serve_request_multiple()" [lib/Perlbal/ClientHTTPBase.pm] function when processing user-supplied requests, which could be exploited to conduct a single upward directory traversal attack and disclose sensitive information.

Affected Products

Perlbal versions prior to 1.70

Solution

Upgrade to Perlbal version 1.70 :
http://search.cpan.org/dist/Perlbal/

References

http://www.vupen.com/english/advisories/2008/1045
http://search.cpan.org/src/BRADFITZ/Perlbal-1.70/CHANGES
http://code.sixapart.com/trac/perlbal/changeset/766
http://code.sixapart.com/trac/perlbal/changeset/746

Credits

Vulnerabilities reported by Jeremey James and the vendor.

ChangeLog

2008-03-31 : Initial release

Vulnerability Management

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