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Secunia Advisory SA27546

Perl Regular Expressions Unicode Data Buffer Overflow
Secunia Advisory SA27546
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Release Date 2007-11-06
Last Update 2008-04-25
   
Popularity 15,521 views
Comments 0 comments

Criticality level Moderately criticalModerately critical
Impact DoS
System access
Where From remote
Authentication level Available in Customer Area
   
Report reliability Available in Customer Area
Solution Status Vendor Workaround
   
Systems affected Available in Customer Area
Approve distribution Available in Customer Area
   
Software:
Perl 5.x
Secunia CVSS Score Available in Customer Area
CVE Reference(s) CVE-2007-5116 CVSS available in Customer Area
CVE-2008-1927 CVSS available in Customer Area
  

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

Changelog
Further details available in Customer Area

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 in Customer Area


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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