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FreeBSD Security Advisory (FreeBSD-SA-08:08.nmount.asc)

Information

Severity

Severity

Medium

Family

Family

FreeBSD Local Security Checks

CVSSv2 Base

CVSSv2 Base

6.9

CVSSv2 Vector

CVSSv2 Vector

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

Solution Type

Solution Type

Vendor Patch

Created

Created

15 years ago

Modified

Modified

6 years ago

Summary

The remote host is missing an update to the system as announced in the referenced advisory FreeBSD-SA-08:08.nmount.asc

Insight

Insight

The mount(2) and nmount(2) system calls are used by various utilities in the base system to graft a file system object on to the file system tree to a given mount point. It is possible to allow unprivileged users to utililize these system calls by setting the vfs.usermount sysctl(8) variable. 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.

Solution

Solution

Upgrade your system to the appropriate stable release or security branch dated after the correction date https://secure1.securityspace.com/smysecure/catid.html?in=FreeBSD-SA-08:08.nmount.asc

Common Vulnerabilities and Exposures (CVE)