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TITLE:
bogofilter Base64 Decoding Heap Corruption Vulnerability

SECUNIA ADVISORY ID:
SA40427

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40427/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40427

RELEASE DATE:
2010-07-06

DISCUSS ADVISORY:
http://secunia.com/advisories/40427/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/40427/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
 * Remediation Status
 * Secunia CVSS Score
 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=40427

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
A vulnerability has been reported in bogofilter, 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 an off-by-one vulnerability in
bogofilter and bogolexer when processing Base64 encoded strings
beginning with a equal character ("="), which can be exploited to
e.g. cause a heap corruption.

The vulnerability is reported in version 1.2.1. Prior versions may
also be affected.

SOLUTION:
Fixed in the SVN repository. Update to version 1.2.2 as soon as
available.

PROVIDED AND/OR DISCOVERED BY:
Julius Plenz

ORIGINAL ADVISORY:
http://bogofilter.svn.sourceforge.net/viewvc/bogofilter/trunk/bogofilter/doc/bogofilter-SA-2010-01?revision=6909&pathrev=6909

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

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

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