Title: NetBSD "cpu-hog" Denial of Service Vulnerability
Severity: MODERATE
Description:
In 4.x BSD based unix-variants, code running in the kernel must hand over the CPU voluntarily. If a system call runs for an extended period of time for whatever reason and does not yield the CPU, it is not forced to. Along with this, there are a number of tricks regular users can play to make systemcalls run for a long period of time. As a result, it is possible for malicious users to deny other processes CPU time by consuming all of it and cause a denial of service.
Affected Products:
- NetBSD NetBSD 1.4.1 Alpha
- NetBSD NetBSD 1.4.1 SPARC
- NetBSD NetBSD 1.4.1 arm32
- NetBSD NetBSD 1.4.1 x86
- NetBSD NetBSD 1.4.2 Alpha
- NetBSD NetBSD 1.4.2 SPARC
- NetBSD NetBSD 1.4.2 arm32
- NetBSD NetBSD 1.4.2 x86
References:
- NetBSD: NetBSD Security Page
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