CVE-2013-4851

Description

The vfs_hang_addrlist function in sys/kern/vfs_export.c in the NFS server implementation in the kernel in FreeBSD 8.3 and 9.x through 9.1-RELEASE-p5 controls authorization for host/subnet export entries on the basis of group information sent by the client, which allows remote attackers to bypass file permissions on NFS filesystems via crafted requests.

Category

6.4
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 0.21%
Vendor Advisory freebsd.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://svnweb.freebsd.org/base?view=revision&revision=244226
http://www.freebsd.org/security/advisories/FreeBSD-SA-13:08.nfsserver.asc vendor advisory
http://www.securityfocus.com/bid/61484 vdb entry

Frequently Asked Questions

What is the severity of CVE-2013-4851?
CVE-2013-4851 has been scored as a medium severity vulnerability.
How to fix CVE-2013-4851?
To fix CVE-2013-4851, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2013-4851 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2013-4851 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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