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Perl Regular Expressions Unicode Data Buffer Overflow
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Secunia Advisory:
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SA27546
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Release Date:
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2007-11-06
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Last Update:
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2008-04-25
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Popularity:
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8,989 views
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Critical:
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Moderately critical
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Impact:
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DoS
System access
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Where:
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From remote
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Solution Status:
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Vendor Workaround
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| Software: | Perl 5.x
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| CVE reference: | CVE-2007-5116
CVE-2008-1927
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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:
2008-04-25: Updated the "Description" section with additional vulnerability information. Added CVE reference. Updated the "Original Advisory" section.
Original Advisory:
https://bugzilla.redhat.com/show_bug.cgi?id=323571
http://rt.perl.org/rt3/Public/Bug/Display.html?id=40641
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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