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CVE-2010-2020

Status Candidate

Overview

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.

Related Files

NFS Improper Input Validation
Posted May 28, 2010
Authored by Patroklos Argyroudis | Site census-labs.com

Census Labs have discovered two improper input validation vulnerabilities in the FreeBSD kernel's NFS client-side implementation (FreeBSD 8.0-RELEASE, 7.3-RELEASE and 7.2-RELEASE) that allow local unprivileged users to escalate their privileges, or to crash the system by performing a denial of service attack.

tags | advisory, denial of service, kernel, local, vulnerability
systems | freebsd
advisories | CVE-2010-2020
MD5 | 25b481fc56339919c81b6b023495c820
nfs_mount() Local Denial Of Service / Privilege Escalation
Posted May 28, 2010
Authored by Patroklos Argyroudis | Site census-labs.com

Local kernel exploit for nfs_mount() on FreeBSD versions 8.0, 7.3 and 7.2. It escalates privileges on versions 7.2 and 7.3 and causes a denial of service on 8.0.

tags | exploit, denial of service, kernel, local
systems | freebsd
advisories | CVE-2010-2020
MD5 | a3d080507e85c1716e34ca309e2f0f1f
FreeBSD Security Advisory - Unvalidated Input In nfsclient
Posted May 28, 2010
Site security.freebsd.org

FreeBSD Security Advisory - The NFS client subsystem fails to correctly validate the length of a parameter provided by the user when a filesystem is mounted.

tags | advisory
systems | freebsd
advisories | CVE-2010-2020
MD5 | a5341b3f54cb8d0f4dd3cd393e1155fd
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