Cisco Unified Presence before 8.5(4) does not properly detect recursion during entity expansion, which allows remote attackers to cause a denial of service (memory and CPU consumption, and process crash) via a crafted XML document containing a large number of nested entity references, aka Bug IDs CSCtq89842 and CSCtq88547, a similar issue to CVE-2003-1564.
The product uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not properly control the number of recursive definitions of entities.
Link | Tags |
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http://www.cisco.com/en/US/products/products_security_advisory09186a0080b95d47.shtml | not applicable vendor advisory |
https://www.cisco.com/c/en/us/support/docs/csa/cisco-sa-20110928-xcpcupsxml.html | vendor advisory |