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CVE-2010-2020

MediumPublished

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...

Published: May 28, 2010
Updated: Aug 7, 2024
Assigning CNA: freebsd
Evidence observed: Jun 23, 2010

Primary CVSS

6.9/ 10Medium

nvd · CVSS 2.0

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

EPSS probability estimate

0.9%

Low · next 30 days

Percentile: 56.7%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

FreeBSD 8.0/7.3/7.2 - 'nfs_mount()' Local Privilege EscalationExploit
Patroklos Argyroudis · freebsd · Jun 23, 2010
FreeBSD - 'mountnfs()' Denial of ServiceExploit
Patroklos Argyroudis · freebsd · Jun 23, 2010

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