Title: FreeBSD Malformed ELF Image Denial of Service Vulnerability
Severity: LOW
Description:
A vulnerability exists in versions 3.x, and 4.x and 5.x prior to August 15, 2000, of FreeBSD. A failure of the ELF image activator to perform sufficient sanity checks on the ELF image header could result in local users being able to perform a denial of service attack against the machine.
By failing to handle conditions where the header had an invalid or truncated header, FreeBSD could suffer from a sign overflow bug. This in turn would cause the CPU to enter a long in-kernel loop. This can result in the machine being unavailable to remote and local users for 15 minutes or more.
Affected Products:
- FreeBSD FreeBSD 3.0.0
- FreeBSD FreeBSD 3.1.0
- FreeBSD FreeBSD 3.2.0
- FreeBSD FreeBSD 3.3.0
- FreeBSD FreeBSD 3.4.0
- FreeBSD FreeBSD 3.5.0
- FreeBSD FreeBSD 4.0.0
- FreeBSD FreeBSD 4.0.0 alpha
- FreeBSD FreeBSD 4.1.0
- FreeBSD FreeBSD 5.0.0
- FreeBSD FreeBSD 5.0.0 alpha
References:
- FreeBSD: FreeBSD Security Information
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