-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Cisco Security Advisory: Cisco Unified Communications Manager IM and Presence Service SIP Packet Processing Denial of Service Vulnerability Advisory ID: cisco-sa-20160803-ucm Revision 1.0 For Public Release 2016 August 3 16:00 UTC (GMT) +--------------------------------------------------------------------- Summary ======= A vulnerability in Session Initiation Protocol (SIP) processing functions of the Cisco Unified Communications Manager Instant Messaging (IM) and Presence Service could allow an unauthenticated, remote attacker to cause the Cisco SIP Proxy Daemon (sipd) process to restart unexpectedly, resulting in a denial of service (DoS) condition on a targeted system. The vulnerability is due to improper input validation of SIP packet headers. An attacker could exploit this vulnerability by sending a crafted SIP packet to a targeted system. A successful exploit could allow the attacker to cause the sipd process to restart unexpectedly, resulting in a DoS condition on the system. If the sipd process restarts repeatedly, a successful exploit could also result in a sustained DoS condition and cause high disk utilization due to a large number of sipd core files being written to disk, which could exacerbate the DoS condition. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160803-ucm -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (SunOS) iQIVAwUBV5ukEq89gD3EAJB5AQJ4pw/7Bmj9j3Kh0xFsHWEPZqhtu/k0jDL10nxS vnuPH+QVppva9iU1P8aMNwkLH8dLcXR0/F2mJtY89Z57C13daxO9wBixrvoDy5Bp /WEwGJosZ+F7GSlrPhneV4U6oT2UZMMJBRgYQKIe/tZRwnDjfkhvhdtJs/PqujDz Al+jT8lsCc0ibb3amdG/GxEx2znJM4mUKFuXFSBjTLbZ+9AJyOGizl0K14oSLlY7 Kqhw4BNtr08cHQSxfhQ5pyr3sDb9yQjxKUKscYmdo6pCzYWN3dvA+FRiCO32Mv1s tZOm73rEFzr+4g+SL1ohaL2D8m/UhwC6S6Xy4BvLYgGsXBmP5KID3O5thoIh8CDx KVnQMnh+Dqe8JisvCUgGyAq0o67YwSSqC1xYuskhGB2OKFidfp5XoZlLjgLs0W5t 52diKjExpaU6JwvkuRBg6VP13xLDIfcJa5ejpEQKJCR2O6azpcIW1F+frj/s9uPw VucODGFsNuMpZSc2b9QPP7rA8gXW/oK1OoK9Lr2+ODeWATzO/W9gnAe8feEciv3F LK9iE6/DpZcvPYAhUqslmksP9Fd362HSKEBVeRm4Ayrzc0JgO4P7nC9zQ6PI/WAV hytJGPaPNlumo3m8wT8TwdH13zsOVWwNJVMkhwSqsxzFepcNSifmKx88CLcl8oWv u1noYCPNA7I= =IwC/ -----END PGP SIGNATURE-----
