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FreeBSD Security Advisory (FreeBSD-SA-09:13.pipe.asc)

Information

Severity

Severity

Critical

Family

Family

FreeBSD Local Security Checks

CVSSv2 Base

CVSSv2 Base

9.3

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:M/Au:N/C:C/I:C/A:C

Created

Created

13 years ago

Modified

Modified

5 years ago

Summary

The remote host is missing an update to the system as announced in the referenced advisory FreeBSD-SA-09:13.pipe.asc

Insight

Insight

Pipes are a form of inter-process communication (IPC) provided by the FreeBSD kernel. kqueue is an event management API that applications can use to monitor pipes and other kernel services. A race condition exists in the pipe close() code relating to kqueues, causing use-after-free for kernel memory, which may lead to an exploitable NULL pointer vulnerability in the kernel, kernel memory corruption, and other unpredictable results.

Solution

Solution

Upgrade your system to the appropriate stable release or security branch dated after the correction date https://secure1.securityspace.com/smysecure/catid.html?in=FreeBSD-SA-09:13.pipe.asc