|
|
|
 |
Vulnerability Note VU#240790tcpdump contains buffer overflow vulnerability in ISAKMP "Delete Payload" handlingOverviewA vulnerability in tcpdump could allow a remote attacker to cause a denial of service on an affected system.I. DescriptionThe tcpdump tool allows for the inspection of network packets and contains decoders for many standard protocols, including the Internet Security Association and Key Management Protocol (ISAKMP). The ISAKMP standard specifies:The Delete Payload contains a protocol-specific security association identifier that the sender has removed from its security association database and is, therefore, no longer valid. [...] It is possible to send multiple Security Parameter Index(es) (SPIs) in a Delete payload [...] To this end, the format of the "Delete Payload" contains a "# of SPIs" field, specified as two octets. A buffer overflow flaw exists in the way that tcpdump's ISAKMP decoder handles malformed ISAKMP packets specifying an overly large number of SPIs for deletion. Such malformed packets could cause tcpdump to read out of bounds and crash. This condition is only exploitable if tcpdump is invoked with the verbose display option, '-v'. II. ImpactA remote attacker could cause tcpdump to crash.III. SolutionApply a patch from the vendor
References
This vulnerability was discovered by Rapid7 using their Striker test suite. This document was written by Chad R Dougherty based on information published in Rapid7 Advisory R7-0017.
If you have feedback, comments, or additional information about this vulnerability, please send us
email. |
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Get Adobe Reader