Title: FreeBSD 'fifo_vnops.c' Resource Leak Local Denial of Service Vulnerability
Severity: MODERATE
Description:
FreeBSD is prone to a local denial-of-service vulnerability when the kernel handles FIFO resources.
Specifically, the 'fifo_open()' function in 'fifo_vnops.c' fails to properly clean the 'vnode' structure, causing a resource leak and allowing attackers to exhaust the number of available sockets.
Exploiting this issue allows local attackers to trigger denial-of-service conditions.
The issue affects FreeBSD 6.x, 7.x, and 8.x.
Affected Products:
- FreeBSD FreeBSD 6.0.0 -STABLE
- FreeBSD FreeBSD 6.1
- FreeBSD FreeBSD 6.1 -STABLE
- FreeBSD FreeBSD 6.2 -STABLE
- FreeBSD FreeBSD 6.3
- FreeBSD FreeBSD 6.4 -STABLE
- FreeBSD FreeBSD 7.0
- FreeBSD FreeBSD 7.0-STABLE
- FreeBSD FreeBSD 7.1-STABLE
- FreeBSD FreeBSD 7.2-STABLE
- FreeBSD FreeBSD 8.0-STABLE
References:
- Dorr H. Clark: resource leak in fifo_vnops.c: 6.x/7.x/8.x
- FreeBSD: FreeBSD Homepage
- xorl %eax, %eax: FreeBSD FIFO Resource Leak
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