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CVE-2008-3531

Status Candidate

Overview

Stack-based buffer overflow in sys/kern/vfs_mount.c in the kernel in FreeBSD 7.0 and 7.1, when vfs.usermount is enabled, allows local users to gain privileges via a crafted (1) mount or (2) nmount system call, related to copying of "user defined data" in "certain error conditions."

Related Files

FreeBSD nmount() Local Root Exploit
Posted Jul 3, 2009
Authored by Patroklos Argyroudis | Site census-labs.com

Local root exploit for FreeBSD nmount(). This affects FreeBSD 7.0-RELEASE and 7.0-STABLE.

tags | exploit, local, root
systems | freebsd
advisories | CVE-2008-3531
SHA-256 | f73657bff4c5f05a9a63c9564bcf7f676f9adf0f6b8a1b9a13e53473275ca23d
FreeBSD-SA-08-08.nmount.txt
Posted Sep 4, 2008
Site security.freebsd.org

FreeBSD Security Advisory - Various user defined input such as mount points, devices, and mount options are prepared and passed as arguments to nmount(2) into the kernel. Under certain error conditions, user defined data will be copied into a stack allocated buffer stored in the kernel without sufficient bounds checking. If the system is configured to allow unprivileged users to mount file systems, it is possible for a local adversary to exploit this vulnerability and execute code in the context of the kernel.

tags | advisory, kernel, local
systems | freebsd
advisories | CVE-2008-3531
SHA-256 | 8265017f0c4b0022d978e1e3604993352ecac41efc8b787596bf55e18a09b5bb
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