CVE-2018-15381

A Java deserialization vulnerability in Cisco Unity Express (CUE) could allow an unauthenticated, remote attacker to execute arbitrary shell commands with the privileges of the root user. The vulnerability is due to insecure deserialization of user-supplied content by the affected software. An attacker could exploit this vulnerability by sending a malicious serialized Java object to the listening Java Remote Method Invocation (RMI) service. A successful exploit could allow the attacker to execute arbitrary commands on the device with root privileges.

Weakness

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Affected Software

Potential Mitigations

• Make fields transient to protect them from deserialization.
• An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/586.html

References

• http://www.securityfocus.com/bid/105876
• http://www.securitytracker.com/id/1042130
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181107-cue
• http://www.securityfocus.com/bid/105876
• http://www.securitytracker.com/id/1042130
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181107-cue