[SECURITY] [DSA 466-1] New Linux 2.2.10 packages fix local root exploit (powerpc/apus)
From: Martin Schulze (joey_at_infodrom.org)
Date: 03/18/04
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Date: Thu, 18 Mar 2004 12:22:55 +0100 (CET) To: bugtraq@securityfocus.com
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Debian Security Advisory DSA 466-1 security@debian.org
http://www.debian.org/security/ Martin Schulze
March 18th, 2004 http://www.debian.org/security/faq
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Package : kernel-source-2.2.10, kernel-image-2.2.10-powerpc-apus
Vulnerability : failing function and TLB flush
Problem-Type : local
Debian-specific: no
CVE ID : CAN-2004-0077
CERT advisory : VU#981222
Paul Starzetz and Wojciech Purczynski of isec.pl discovered a critical
security vulnerability in the memory management code of Linux inside
the mremap(2) system call. Due to flushing the TLB (Translation
Lookaside Buffer, an address cache) too early it is possible for an
attacker to trigger a local root exploit.
The attack vectors for 2.4.x and 2.2.x kernels are exclusive for the
respective kernel series, though. We formerly believed that the
exploitable vulnerability in 2.4.x does not exist in 2.2.x which is
still true. However, it turned out that a second (sort of)
vulnerability is indeed exploitable in 2.2.x, but not in 2.4.x, with a
different exploit, of course.
For the stable distribution (woody) this problem has been fixed in
version 2.2.10-13woody1 of 2.2 kernel images for the powerpc/apus
architecture and in version 2.2.10-2 of Linux 2.2.10 source.
For the unstable distribution (sid) this problem will be fixed soon
with the 2.4.20 kernel-image package for powerpc/apus. The old 2.2.10
kernel image will be removed from Debian unstable.
You are strongly advised to switch to the fixed 2.4.17 kernel-image
package for powerpc/apus from woody until the 2.4.20 kernel-image
package is fixed in the unstable distribution.
We recommend that you upgrade your Linux kernel package.
Upgrade Instructions
- --------------------
wget url
will fetch the file for you
dpkg -i file.deb
will install the referenced file.
If you are using the apt-get package manager, use the line for
sources.list as given below:
apt-get update
will update the internal database
apt-get upgrade
will install corrected packages
You may use an automated update by adding the resources from the
footer to the proper configuration.
Debian GNU/Linux 3.0 alias woody
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Source archives:
http://security.debian.org/pool/updates/main/k/kernel-source-2.2.10/kernel-source-2.2.10_2.2.10-2.dsc
Size/MD5 checksum: 602 c30270ed0bb5a9b99775aefaff4b5037
http://security.debian.org/pool/updates/main/k/kernel-source-2.2.10/kernel-source-2.2.10_2.2.10-2.diff.gz
Size/MD5 checksum: 13862 b0dec7f7611601b2aab69d2117298641
http://security.debian.org/pool/updates/main/k/kernel-source-2.2.10/kernel-source-2.2.10_2.2.10.orig.tar.gz
Size/MD5 checksum: 13902979 e3e865f9103dfcea4a3715d66d89dad1
http://security.debian.org/pool/updates/main/k/kernel-image-2.2.10-powerpc-apus/kernel-image-2.2.10-powerpc-apus_2.2.10-13woody1.dsc
Size/MD5 checksum: 614 f6f2c6563e5eed7ff97d19551a1117fb
http://security.debian.org/pool/updates/main/k/kernel-image-2.2.10-powerpc-apus/kernel-image-2.2.10-powerpc-apus_2.2.10-13woody1.tar.gz
Size/MD5 checksum: 453378 865a8125d959621697b045edc210e200
Architecture independent components:
http://security.debian.org/pool/updates/main/k/kernel-source-2.2.10/kernel-doc-2.2.10_2.2.10-2_all.deb
Size/MD5 checksum: 866978 74d85ee7a1f5855710b3201b907967dd
http://security.debian.org/pool/updates/main/k/kernel-source-2.2.10/kernel-source-2.2.10_2.2.10-2_all.deb
Size/MD5 checksum: 11302672 7a66220ced59920d2cc50eff7003108f
PowerPC architecture:
http://security.debian.org/pool/updates/main/k/kernel-image-2.2.10-powerpc-apus/kernel-headers-2.2.10-apus_2.2.10-13woody1_powerpc.deb
Size/MD5 checksum: 1575772 03558d9d86b2c08194088cf5cece6811
http://security.debian.org/pool/updates/main/k/kernel-image-2.2.10-powerpc-apus/kernel-image-2.2.10-apus_2.2.10-13woody1_powerpc.deb
Size/MD5 checksum: 1303764 2a3c5a6a45c3978ae45c4572ddc0547b
These files will probably be moved into the stable distribution on
its next revision.
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For apt-get: deb http://security.debian.org/ stable/updates main
For dpkg-ftp: ftp://security.debian.org/debian-security dists/stable/updates/main
Mailing list: debian-security-announce@lists.debian.org
Package info: `apt-cache show <pkg>' and http://packages.debian.org/
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Relevant Pages
... Vulnerability: ... respective kernel series, though. ... with the 2.4.20 kernel-image package for powerpc/apus. ... kernel image will be removed from Debian unstable. ...
(Full-Disclosure)
... Debian supply both optimised kernels and to a lesser degree ... Doing a full emerge of the kernel source (inside the ... really required and what is not for a package (this requires the most ... soon as it stopped compiling and installing. ...
(Debian-User)
... server to EMC so natural failover which comes with EMC can't be ... not with Debian:( ... EMC has PowerPath software but it's binary version including kernel ... though the resulting package is fairly basic, ...
(Debian-User)
... One of the things that Debian does is to backport fixes to "older" ... report of a security hole in the particular version of some software ... The 'stable' package set is not so good at keeping up with the ... Mostly the same things apply to the kernel as with other software. ...
(comp.os.linux.misc)
... firmware in /lib/firmware and not in versioned subdirs. ... The problem for Debian users is NOT official Debian kernel packages. ... don't know the first thing about package management. ...
(Linux-Kernel)
