CVE-2015-5911

Vulnerability

The Twisted library in Wiki Server on Apple OS X Server prior to version 5.0.3 contains multiple unspecified vulnerabilities that can be triggered by processing a malicious XML document [1]. The exact code path and required configuration are not detailed in the advisory, but the issue resides in the XML handling component of Twisted as used by Wiki Server.

Exploitation

An attacker would need to deliver a crafted XML document to the vulnerable Wiki Server instance. The advisory does not specify the level of access required, but given the XML parsing vector, network-based exploitation without authentication may be possible [1].

Impact

According to Apple's security advisory, the impact of these vulnerabilities is unknown. However, based on the nature of XML parsing flaws, potential consequences could include denial of service, information disclosure, or possibly arbitrary code execution [1].

Mitigation

Apple released OS X Server version 5.0.3 to address these issues. Users should update to version 5.0.3 or later, available through the Mac App Store [1]. No workarounds are provided by Apple.