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[SA13436] Sun Solaris Sendmail DNS TXT Records Buffer Overflow

From: Secunia Security Advisories (sec-advsecunia.com)
Date: Tue Dec 14 2004 - 07:06:37 CST

TITLE:
Sun Solaris Sendmail DNS TXT Records Buffer Overflow

SECUNIA ADVISORY ID:
SA13436

VERIFY ADVISORY:
http://secunia.com/advisories/13436/

CRITICAL:
Moderately critical

IMPACT:
DoS, System access

WHERE:
From remote

OPERATING SYSTEM:
Sun Solaris 9
http://secunia.com/product/95/

DESCRIPTION:
An old vulnerability has been reported in sendmail included in
Solaris 9, which can be exploited by malicious people to cause a DoS
(Denial of Service) and potentially compromise a vulnerable system.

The vulnerability is caused due to a boundary error when processing
DNS responses. This can be exploited to cause a buffer overflow by
returning a specially crafted DNS response.

Successful exploitation requires that sendmail has been configured to
use a custom DNS map to query TXT records.

SOLUTION:
Apply patch.

-- SPARC Platform --

Solaris 9:
http://sunsolve.sun.com/search/document.do?assetkey=urn:cds:docid:1-21-113575-01-1

PROVIDED AND/OR DISCOVERED BY:
Originally discovered by:
* Joost Pol
* Anton Rang, Sun Microsystems.

ORIGINAL ADVISORY:
http://sunsolve.sun.com/search/document.do?assetkey=1-26-57696-1

OTHER REFERENCES:
US-CERT VU#814627:
http://www.kb.cert.org/vuls/id/814627

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