11056464 2003-12-04 15:23 -0500 /89 rader/ Rajiv Aaron Manglani <rajiv@gentoo.org>
Importerad: 2003-12-04 21:54 av Brevbäraren
Extern mottagare: bugtraq@securityfocus.com
Mottagare: Bugtraq (import) <30188>
Ärende: GLSA: kernel (200312-02)
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From: Rajiv Aaron Manglani <rajiv@gentoo.org>
To: bugtraq@securityfocus.com
Message-ID: <a05210603bbf545a9fef0@[10.96.0.12]>
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GENTOO LINUX SECURITY ANNOUNCEMENT 200312-02
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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]
// end
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(11056464) /Rajiv Aaron Manglani <rajiv@gentoo.org>/(Ombruten)