SB2011050309 - Input validation error in FreeBSD
Published: May 3, 2011 Updated: August 11, 2020
Security Bulletin ID
SB2011050309
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) Input validation error (CVE-ID: CVE-2011-1739)
The vulnerability allows a remote non-authenticated attacker to manipulate data.
The makemask function in mountd.c in mountd in FreeBSD 7.4 through 8.2 does not properly handle a -network field specifying a CIDR block with a prefix length that is not an integer multiple of 8, which allows remote attackers to bypass intended access restrictions in opportunistic circumstances via an NFS mount request.
Remediation
Install update from vendor's website.