Gentoo: GLSA-200312-02: kernel
Summary
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- -------------------------------------------------------------------------- GENTOO LINUX SECURITY ANNOUNCEMENT 200312-02 - --------------------------------------------------------------------------
GLSA: 200312-02 package: kernel summary: A flaw in the do_brk() function of Linux kernel 2.4.22 and earlier can be exploited by local users or malicious services to gain root privileges. severity: high Gentoo bug: 34844 date: 2003-12-04 CVE: CAN-2003-0961 exploit: local affected: <2.4.22 fixed: >=2.4.23 fixed: >=2.4.22+patches
DESCRIPTION:
Lack of proper bounds checking exists in the do_brk() kernel function in Linux kernels prior to 2.4.23. This bug can be used to give a userland program or malicious service access to the full kernel address space and gain root privileges. This issue is known to be exploitable.
All kernel ebuilds in Portage have been bumped or patched and do not contain this vulnerability. The following is a list of recommended kernels.
aa-sources-2.4.23_pre6-r3 ck-sources-2.4.22-r3 gentoo-sources-2.4.20-r9 gentoo-sources-2.4.22-r1 grsec-sources-2.4.22.1.9.12-r1 grsec-sources-2.4.22.2.0_rc3-r1 gs-sources-2.4.23_pre8-r1 hardened-sources-2.4.22-r1 hardened-sources-2.4.22-r1 ia64-sources-2.4.22-r1 mips-sources-2.4.22-r4 mips-sources-2.4.22-r5 openmosix-sources-2.4.22-r1 ppc-sources-2.4.22-r3 ppc-sources-benh-2.4.20-r9 ppc-sources-benh-2.4.21-r2 ppc-sources-benh-2.4.22-r3 ppc-sources-crypto-2.4.20-r1 selinux-sources-2.4.21-r5 sparc-sources-2.4.23 usermode-sources-2.4.22-r1 wolk-sources-4.10_pre7-r1 wolk-sources-4.9-r2 xfs-sources-2.4.20-r4
SOLUTION:
It is recommended that all Gentoo Linux users upgrade their machines to use a kernel from the list above.
emerge sync emerge -pv [your preferred kernel sources] emerge [your preferred kernel sources] [update the /usr/src/linux symlink] [compile and install your new kernel] [emerge any necessary kernel module ebuilds] [reboot]
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Resolution
References
Availability
Concerns
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