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TITLE:
Snort "rule20275eval()" Buffer Overflow Vulnerability

SECUNIA ADVISORY ID:
SA51901

VERIFY ADVISORY:
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http://secunia.com/advisories/51901/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=51901

RELEASE DATE:
2013-01-21

DISCUSS ADVISORY:
http://secunia.com/advisories/51901/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
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http://secunia.com/advisories/51901/

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https://ca.secunia.com/?page=viewadvisory&vuln_id=51901

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http://secunia.com/vulnerability_scanning/personal/
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DESCRIPTION:
Tavis Ormandy has reported a vulnerability in Snort, which can be
exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to a boundary error within the
"rule20275eval()" function (netbios_kb961501-smb-printss-reponse.c)
when parsing DCE/RPC responses and can be exploited to cause a
stack-based buffer overflow.

Successful exploitation may allow execution of arbitrary code but
requires that rule "3-20275" is enabled.

The vulnerability is reported in versions 2.9.4.0, 2.9.3.1, and
2.9.2.3. Other versions may also be affected.

SOLUTION:
Update Snort rules to a version released on 2013-01-17 or later.

PROVIDED AND/OR DISCOVERED BY:
Tavis Ormandy

ORIGINAL ADVISORY:
Sourcefire:
http://blog.snort.org/2013/01/sourcefire-vrt-certified-snort-rules_18.html
http://www.snort.org/vrt/docs/ruleset_changelogs/changes-2013-01-17.html

Tavis Ormandy:
https://twitter.com/taviso/status/292146786049601536

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/vulnerability_intelligence/

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