December 11, 2019
Avaya IP Office Application Server is prone to a cross-site scripting vulnerability. Remote attackers can exploit this issue to execute arbitrary script code in the browser of an unsuspecting user in the context of the affected site. This may allow the attacker to steal cookie-based authentication credentials and launch other attacks. Avaya IP Office Application Server versions 11.0 FP4 SP1 and prior are vulnerable.
- Avaya IP Office Application Server 11.0
- Avaya IP Office Application Server 11.0 FP4 SP1
- Avaya IP Office Application Server 5.0
- Avaya IP Office Application Server 5.0.1
- Avaya IP Office Application Server 6.0
- Avaya IP Office Application Server 6.1
- Avaya IP Office Application Server 7.0
- Avaya IP Office Application Server 8.0
- Avaya IP Office Application Server 8.1
- Avaya IP Office Application Server 9.0
- Avaya IP Office Application Server 9.0 SP 1
- Avaya IP Office Application Server 9.0 SP 2
Run all software as a nonprivileged user with minimal access rights.
To reduce the impact of latent vulnerabilities, always run nonadministrative software as an unprivileged user with minimal access rights.
Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity. This may indicate exploit attempts or activity that results from successful exploits.
Do not follow links provided by unknown or untrusted sources.
Web users should be cautious about following links to sites that are provided by unfamiliar or suspicious sources. Filtering HTML from emails may help remove a possible vector for transmitting malicious links to users.
Since exploiting cross-site scripting issues often requires malicious script code to run in browsers, consider disabling script code and active content support within a client browser as a way to prevent a successful exploit. Note that this mitigation tactic might adversely affect legitimate sites that rely on the execution of browser-based script code.
Implement multiple redundant layers of security.
Various memory-protection schemes (such as nonexecutable and randomly mapped memory segments) may hinder an attacker's ability to exploit this vulnerability to execute arbitrary code.
Updates are available. Please see the references or vendor advisory for more information.
Daniel Bohan and Scott Goodwin from OCD Tech.
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