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TITLE:
libevent DNS Response Denial of Service

SECUNIA ADVISORY ID:
SA24181

VERIFY ADVISORY:
http://secunia.com/advisories/24181/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
libevent 1.x
http://secunia.com/product/13501/

DESCRIPTION:
Jon Oberheide has reported a vulnerability in libevent, which can be
exploited by malicious people to cause a DoS (Denial of Service) of
applications using the library.

The vulnerability is caused due to an error in the handling of label
pointers in DNS responses. This can be exploited to cause libevent to
enter an infinite loop by sending a specially crafted DNS response.

The vulnerability is reported in versions 1.2 through 1.2a. Other
versions may also be affected.

SOLUTION:
Update to version 1.3 or later.

PROVIDED AND/OR DISCOVERED BY:
Jon Oberheide

ORIGINAL ADVISORY:
http://lists.grok.org.uk/pipermail/full-disclosure/2007-February/052530.html

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