Title: Linux Kernel 2.4.18 iBCS IPC signal handling Vulnerability
Severity: MODERATE
Description:
Linux kernels prior to and including 2.4.18, for intel x86 architecture, can be made to disregard user privileges when handling IPC signals. This relates to intel binary compatibility standard (iBCS) routines in arch/i386/kernel/traps.c. Successfully exploiting this vulnerability allows an attacker to send signals such as SIGKILL to arbitrary processes, including system processes. The full details of this vulnerability are not available at this time.
Affected Products:
- Debian Linux 3.0.0 ia-32
- Linux kernel 2.4.18 x86
References:
- Avery Buffington <avery.buffington@fxfn.com>: linux <=2.4.18 x86 traps.c problem
- Openwall Project: Linux kernel patch from the Openwall Project
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