SB2013050209 - Input validation error in FreeBSD

Description

This security bulletin contains information about 1 vulnerability.

1) Input validation error (CVE-ID: CVE-2013-3266)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

The nfsrvd_readdir function in sys/fs/nfsserver/nfs_nfsdport.c in the new NFS server in FreeBSD 8.0 through 9.1-RELEASE-p3 does not verify that a READDIR request is for a directory node, which allows remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code by specifying a plain file instead of a directory.

Remediation

Install update from vendor's website.

References

• http://secunia.com/advisories/53241
• http://www.debian.org/security/2013/dsa-2672
• http://www.freebsd.org/security/advisories/FreeBSD-SA-13:05.nfsserver.asc
• http://www.securitytracker.com/id/1028491