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TITLE:
Berkley Yacc Denial of Service Security Issue

SECUNIA ADVISORY ID:
SA31073

VERIFY ADVISORY:
http://secunia.com/advisories/31073/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
Berkley Yacc
http://secunia.com/product/19335/

DESCRIPTION:
A security issue has been reported in Berkley Yacc, which potentially
can be exploited by malicious people to cause a DoS (Denial of
Service).

The security issue is caused due to an error in the generated
"yyparse()" function and can be exploited to cause an out-of-bounds
memory read when reducing a parsed rule with an empty right hand
side.

SOLUTION:
Do not parse untrusted input using Berkley Yacc generated code.

PROVIDED AND/OR DISCOVERED BY:
Otto Moerbeck

ORIGINAL ADVISORY:
http://marc.info/?l=openbsd-cvs&m=121553004431393&w=2

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
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Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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