Symantec Backup Exec RPC Remote Heap Overflow Vulnerability
iDefense Security Advisory 07.11.07
Jul 11, 2007
Symantec Backup Exec is a data recovery solution. It provides backup
services and includes agents that provide protection and recovery.
Additionally, it facilitates management of local and remote server
backups. More information is available at the URL shown below.
Remote exploitation of a heap overflow vulnerability in Symantec Backup
Exec could allow an unauthenticated attacker to create a denial of
service condition or potentially execute arbitrary code.
The flaw specifically exists within the RPC server that listens on TCP
port 6106. When handling requests using the "ncacn_ip_tcp" protocol,
the service will copy a user supplied amount of data into a fixed-size
Exploitation allows attackers to cause the affected service to
terminate. This vulnerability has the potential to lead to the
execution of arbitrary code.
No authentication is required to access the affected RPC service. An
attacker only needs the ability to establish a TCP session.
iDefense confirmed the existence of this vulnerability in Symantec
Backup Exec 10d with all current hot-fixes and service packs applied.
Other versions are suspected to be vulnerable.
Employing firewalls to limit access to the affected service will
mitigate exposure to this vulnerability.
VI. VENDOR RESPONSE
Symantec has addressed this vulnerability by releasing a HotFix. More
information is available in Symantec's advisory at the following URL.
VII. CVE INFORMATION
The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2007-3509 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org/), which standardizes names for
VIII. DISCLOSURE TIMELINE
05/01/2007 Initial vendor notification
05/01/2007 Initial vendor response
07/11/2007 Coordinated public disclosure
The discoverer of this vulnerability wishes to remain anonymous.
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X. LEGAL NOTICES
Copyright =C2=A9 2007 iDefense, Inc.
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