CVE-2010-2020

Severity: medium (CVSS 6.9 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2010-05-28 · updated 2026-06-16
Weakness: CWE-20

Description

sys/nfsclient/nfs_vfsops.c in the NFS client in the kernel in FreeBSD 7.2 through 8.1-PRERELEASE, when vfs.usermount is enabled, does not validate the length of a certain fhsize parameter, which allows local users to gain privileges via a crafted mount request.

Affected products

FreeBSD: 7.2, 7.2-pre-release, 7.2-stable, 8.0, 8.1-prerelease

References

http://security.FreeBSD.org/advisories/FreeBSD-SA-10:06.nfsclient.asc
http://securitytracker.com/id?1024039
http://www.exploit-db.com/exploits/14002
http://www.exploit-db.com/exploits/14003
http://security.FreeBSD.org/advisories/FreeBSD-SA-10:06.nfsclient.asc
http://securitytracker.com/id?1024039
http://www.exploit-db.com/exploits/14002
http://www.exploit-db.com/exploits/14003

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