VAR-200509-0144
Vulnerability from variot - Updated: 2025-04-03 22:31Sybari Antigen 8.0 SR2 does not properly filter SMTP messages, which allows remote attackers to bypass custom filter rules and send file attachments of arbitrary file types via a message with a subject of "Antigen forwarded attachment". Sybari Antigen for Exchange/SMTP products are vulnerable to an attachment rule bypass vulnerability. A successful attack may result in arbitrary attachments and unwanted content being delivered to users. It should be noted that this issue does not disable or bypass antivirus scanning of attachments. Sybari Antigen v8.0 SR2 for Exchange and Sybari Antigen v8.0 SR2 for SMTP Gateways are reportedly vulnerable. Other versions may be affected as well. Sybari Antigen is a multi-scanning engine solution that integrates eight different scanning engines from detection to execution in a single product, providing a higher level of security protection against today's malicious code attacks.
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TITLE: Antigen for Exchange "Antigen forwarded attachment" Filter Bypass
SECUNIA ADVISORY ID: SA16759
VERIFY ADVISORY: http://secunia.com/advisories/16759/
CRITICAL: Less critical
IMPACT: Security Bypass
WHERE:
From remote
SOFTWARE: Antigen 8.x http://secunia.com/product/5731/
DESCRIPTION: Alan G.
The vulnerability is caused due to a design error in the processing of mails with the subject "Antigen forwarded attachment". This can be exploited to bypass certain custom filters for file attachments.
The vulnerability has been reported in version 8.0 SR2.
Some other issues which may be security related have also been reported by the vendor.
SOLUTION: Update to version 8.0 SR3 for Exchange (Build 1517). http://www.sybari.com/portal/alias__Rainbow/lang__en-US/tabID__3359/DesktopDefault.aspx
PROVIDED AND/OR DISCOVERED BY: Alan G. Monaghan, Gardner Publications, Inc
About: This Advisory was delivered by Secunia as a free service to help everybody keeping their systems up to date against the latest vulnerabilities.
Subscribe: http://secunia.com/secunia_security_advisories/
Definitions: (Criticality, Where etc.) http://secunia.com/about_secunia_advisories/
Please Note: Secunia recommends that you verify all advisories you receive by clicking the link. Secunia NEVER sends attached files with advisories. Secunia does not advise people to install third party patches, only use those supplied by the vendor.
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| Author | Source | Type | Date | Other |
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