May 8, 2007
Microsoft Exchange is prone to a remote code-execution vulnerability because the application fails to properly decode specially crafted email messages. Successfully exploiting this issue allows remote attackers to execute arbitrary code in the context of the vulnerable application, which may lead to a complete compromise of affected computers.
- Avaya Messaging Application Server
- Avaya Messaging Application Server MM 2.0
- Avaya Messaging Application Server MM 3.0
- Avaya Messaging Application Server MM 3.1
- Microsoft Exchange Server 2000
- Microsoft Exchange Server 2000 SP1
- Microsoft Exchange Server 2000 SP2
- Microsoft Exchange Server 2000 SP3
- Microsoft Exchange Server 2003 SP1
- Microsoft Exchange Server 2003
- Microsoft Exchange Server 2003 SP2
- Microsoft Exchange Server 2007
Block external access at the network boundary, unless external parties require service.
Ensure that only trusted hosts and networks can connect to vulnerable servers.
Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of suspicious or anomalous activity. This may help detect malicious actions that an attacker may take after successfully exploiting vulnerabilities in applications. Review all applicable logs regularly.
Implement multiple redundant layers of security.
Since this issue may be leveraged to execute code, we recommend memory-protection schemes, such as non-executable stack/heap configurations and randomly mapped memory segments. This tactic may complicate exploit attempts of memory-corruption vulnerabilities.
The vendor has released an advisory along with fixes to address this issue. Please see the referenced advisory for more information.
The vendor disclosed this issue.
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