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-----BEGIN PGP SIGNED MESSAGE----- |
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Hash: SHA1 |
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- -------------------------------------------------------------------------- |
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GENTOO LINUX SECURITY ANNOUNCEMENT 200312-02 |
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- -------------------------------------------------------------------------- |
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|
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GLSA: 200312-02 |
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package: kernel |
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summary: A flaw in the do_brk() function of Linux kernel 2.4.22 |
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and earlier can be exploited by local users or malicious |
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services to gain root privileges. |
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severity: high |
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Gentoo bug: 34844 |
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date: 2003-12-04 |
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CVE: CAN-2003-0961 |
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exploit: local |
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affected: <2.4.22 |
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fixed: >=2.4.23 |
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fixed: >=2.4.22+patches |
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|
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|
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DESCRIPTION: |
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|
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Lack of proper bounds checking exists in the do_brk() kernel function in |
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Linux kernels prior to 2.4.23. This bug can be used to give a userland |
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program or malicious service access to the full kernel address space and |
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gain root privileges. This issue is known to be exploitable. |
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|
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All kernel ebuilds in Portage have been bumped or patched and do not contain |
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this vulnerability. The following is a list of recommended kernels. |
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|
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aa-sources-2.4.23_pre6-r3 |
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ck-sources-2.4.22-r3 |
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gentoo-sources-2.4.20-r9 |
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gentoo-sources-2.4.22-r1 |
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grsec-sources-2.4.22.1.9.12-r1 |
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grsec-sources-2.4.22.2.0_rc3-r1 |
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gs-sources-2.4.23_pre8-r1 |
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hardened-sources-2.4.22-r1 |
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hardened-sources-2.4.22-r1 |
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ia64-sources-2.4.22-r1 |
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mips-sources-2.4.22-r4 |
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mips-sources-2.4.22-r5 |
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openmosix-sources-2.4.22-r1 |
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ppc-sources-2.4.22-r3 |
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ppc-sources-benh-2.4.20-r9 |
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ppc-sources-benh-2.4.21-r2 |
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ppc-sources-benh-2.4.22-r3 |
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ppc-sources-crypto-2.4.20-r1 |
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selinux-sources-2.4.21-r5 |
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sparc-sources-2.4.23 |
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usermode-sources-2.4.22-r1 |
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wolk-sources-4.10_pre7-r1 |
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wolk-sources-4.9-r2 |
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xfs-sources-2.4.20-r4 |
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|
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|
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SOLUTION: |
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|
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It is recommended that all Gentoo Linux users upgrade their machines to use |
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a kernel from the list above. |
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|
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emerge sync |
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emerge -pv [your preferred kernel sources] |
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emerge [your preferred kernel sources] |
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[update the /usr/src/linux symlink] |
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[compile and install your new kernel] |
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[emerge any necessary kernel module ebuilds] |
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[reboot] |
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|
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|
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// end |
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|
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