A vulnerability has been reported in HP-UX, which can be exploited by malicious people to compromise a vulnerable system.
The vulnerability is caused due to a boundary error within "pfs_mountd.rpc" daemon when handling certain UDP packets. This can be exploited to cause a buffer overflow by sending two specially crafted UDP packets to the daemon.
Successful exploitation allows execution of arbitrary code.
The vulnerability is reported in versions HP-UX B.11.00 (obsolete), B.11.11 and B.11.23.
NOTE: PFS is reportedly obsolete since 2004-03-01 and no longer supported on any HP-UX release, but is supplied with HP-UX B.11.00, B.11.11, and B.11.23.
Solution: Use the enhanced CDFS and mount/umount commands by applying the patches. The vendor also recommends discontinuing the use of PFS.
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Subject: HP-UX Portable File System "pfs_mountd.rpc" Buffer Overflow Vulnerability
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