SB2013072915 - Permissions, Privileges, and Access Controls in FreeBSD
Published: July 29, 2013 Updated: August 11, 2020
Security Bulletin ID
SB2013072915
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2013-4851)
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
The vfs_hang_addrlist function in sys/kern/vfs_export.c in the NFS server implementation in the kernel in FreeBSD 8.3 and 9.x through 9.1-RELEASE-p5 controls authorization for host/subnet export entries on the basis of group information sent by the client, which allows remote attackers to bypass file permissions on NFS filesystems via crafted requests.
Remediation
Install update from vendor's website.