Symantec Brightmail AntiSpam / Mail Security Appliance Denial of Service
Secunia Advisory: SA16733
Release Date: 2005-09-07
Last Update: 2005-09-22
Popularity: 9,710 views

Critical:
Moderately critical
Impact: DoS
Where: From remote
Solution Status: Vendor Patch

OS:Symantec Mail Security Appliance 4.1.x

Software:Symantec Brightmail AntiSpam 6.x

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Description:
Two vulnerabilities have been reported in Brightmail and Mail Security 8200 Appliance, which potentially can be exploited by malicious people to cause a DoS (Denial of Service).

1) An error in the antivirus when scanning or cleaning certain messages (e.g. containing deeply nested zip files) may be exploited to cause the antivirus to process the messages for an extended period of time.

2) An error in the decomposer when processing messages containing winmail.dat objects embedded in a MIME file may be exploited to crash the decomposer.

The vulnerabilities have been reported in the following versions:
* Symantec Brightmail AntiSpam 6.0.1 and 6.0.2
* Symantec Mail Security 8200 Series Appliance

Brightmail AntiSpam on Win32 platforms are not affected.

Solution:
Apply patches.

Symantec Brightmail AntiSpam 6.0.1 and 6.0.2:
Apply patch 157.
ftp://ftp.symantec.com/public/english...ucts/sba/sba_60x/updates/patch157.zip

Symantec Mail Security 8200 Series Appliance:
Update to the latest version (build 4.1.0-58) via automatic update.

Provided and/or discovered by:
Reported by vendor.

Changelog:
2005-09-22: New information on affected versions. Updated "Description" and "Solution" sections.

Original Advisory:
ftp://ftp.symantec.com/public/english...ba_60x/updates/release_notes_p157.txt
http://securityresponse.symantec.com/avcenter/security/Content/2005.09.21a.html
http://securityresponse.symantec.com/avcenter/security/Content/2005.09.21b.html


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