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Insecure Library Loading
Moderately critical

Perl Regular Expressions Unicode Data Buffer Overflow

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Release Date:  2007-11-06    Last Update:  2008-04-25    Views:  20,157

Secunia Advisory SA27546

Where:

From remote

Impact:

DoS, System access

Solution Status:

Vendor Workaround

Software:

CVE Reference(s):

Description


Tavis Ormandy and Will Drewry have reported a vulnerability in Perl, which potentially can be exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to a boundary error within the processing of regular expressions containing Unicode data. This can be exploited to cause a buffer overflow via a specially crafted regular expression causing a runtime switch to the Unicode character scheme.

The vulnerability is reported in version 5.8.8. Other versions may also be affected.

NOTE: An additional potential vulnerability related to the processing of Unicode characters in regular expressions has also been reported.


Solution:
Fixed in development version 5.9.5.

Provided and/or discovered by:
Red Hat credits Tavis Ormandy and Will Drewry, Google Security Team

Original Advisory:
https://bugzilla.redhat.com/show_bug.cgi?id=323571
http://rt.perl.org/rt3/Public/Bug/Display.html?id=40641

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Perl Regular Expressions Unicode Data Buffer Overflow

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