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Debian alert: New Linux 2.4.19 packages fix several local root exploits (mips)

Posted by dave on · 2 comments
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An integer overflow in brk() system call (do_brk() function) for Linux allows a local attacker to gain root privileges. Fixed upstream in Linux 2.4.23.

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- -------------------------------------------------------------------------- Debian Security Advisory DSA 450-1 [e-mail:security@debian.org] http://www.debian.org/security/ Martin Schulze February 27th, 2004 http://www.debian.org/security/faq - --------------------------------------------------------------------------

Package : kernel-source-2.4.19, kernel-patch-2.4.19-mips Vulnerability : several vulnerabilities Problem-Type : local Debian-specific: no CVE ID : CAN-2003-0961 CAN-2003-0985 CAN-2004-0077

Several local root exploits have been discovered recently in the Linux kernel. This security advisory updates the mips kernel 2.4.19 for Debian GNU/Linux. The Common Vulnerabilities and Exposures project identifies the following problems that are fixed with this update:

CAN-2003-0961:

An integer overflow in brk() system call (do_brk() function) for Linux allows a local attacker to gain root privileges. Fixed upstream in Linux 2.4.23.

CAN-2003-0985:

Paul Starzetz discovered a flaw in bounds checking in mremap() in the Linux kernel (present in version 2.4.x and 2.6.x) which may allow a local attacker to gain root privileges. Version 2.2 is not affected by this bug. Fixed upstream in Linux 2.4.24.

CAN-2004-0077:

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 missing function return value check of internal functions a local attacker can gain root privileges. Fixed upstream in Linux 2.4.25 and 2.6.3.

For the stable distribution (woody) these problems have been fixed in version 2.4.19-0.020911.1.woody3 of mips images and version 2.4.19-4.woody1 of kernel source.

For the unstable distribution (sid) this problem will be fixed soon with the next upload of a 2.4.19 kernel image and in version 2.4.22-0.030928.3 for 2.4.22.

We recommend that you upgrade your Linux kernel packages immediately.

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 - --------------------------------

Source archives:

http://security.debian.org/pool/updates/main/k/kernel-source-2.4.19/kernel-source-2.4.19_2.4.19-4.woody1.dsc Size/MD5 checksum: 672 7bbdd141827b2a7c6e5d3dc0ec1419aa http://security.debian.org/pool/updates/main/k/kernel-source-2.4.19/kernel-source-2.4.19_2.4.19-4.woody1.diff.gz Size/MD5 checksum: 40736 2a4fa2f28b3af1ba4247255cf1cab05d http://security.debian.org/pool/updates/main/k/kernel-source-2.4.19/kernel-source-2.4.19_2.4.19.orig.tar.gz Size/MD5 checksum: 32000211 237896fbb45ae652cc9c5cecc9b746da

http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.19-mips/kernel-patch-2.4.19-mips_2.4.19-0.020911.1.woody3.dsc Size/MD5 checksum: 792 767aee163c5c3fccbddf1f917d06488c http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.19-mips/kernel-patch-2.4.19-mips_2.4.19-0.020911.1.woody3.tar.gz Size/MD5 checksum: 1020287 80c1f72a99eaf113161c589ec49b06f6

Architecture independent components:

http://security.debian.org/pool/updates/main/k/kernel-source-2.4.19/kernel-doc-2.4.19_2.4.19-4.woody1_all.deb Size/MD5 checksum: 1782662 b8ade5f98fcb9f3a5627d688467eddcb http://security.debian.org/pool/updates/main/k/kernel-source-2.4.19/kernel-source-2.4.19_2.4.19-4.woody1_all.deb Size/MD5 checksum: 25892640 b22804d26e298f7f02e51d48d31da2dc

http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.19-mips/kernel-patch-2.4.19-mips_2.4.19-0.020911.1.woody3_all.deb Size/MD5 checksum: 1020394 ba072ba9f904251c7327ccbeedaa8f20

Big endian MIPS architecture:

http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.19-mips/kernel-headers-2.4.19_2.4.19-0.020911.1.woody3_mips.deb Size/MD5 checksum: 3918150 d1d65ee7cfabcf71efc5d06ac78f6319 http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.19-mips/kernel-image-2.4.19-r4k-ip22_2.4.19-0.020911.1.woody3_mips.deb Size/MD5 checksum: 2075108 8f41b6344fe92ba16e69a623c8e3a9b7 http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.19-mips/kernel-image-2.4.19-r5k-ip22_2.4.19-0.020911.1.woody3_mips.deb Size/MD5 checksum: 2075486 e53315d4e51e49d809e83191d945a4f8 http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.19-mips/mips-tools_2.4.19-0.020911.1.woody3_mips.deb Size/MD5 checksum: 12842 b65ca394f3fe542c68787794ee5a4337

These files will probably be moved into the stable distribution on its next revision.

- --------------------------------------------------------------------------------- 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: [e-mail:debian-security-announce@lists.debian.org] Package info: 'apt-cache show ' and http://packages.debian.org/

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-- To UNSUBSCRIBE, email to [e-mail:debian-security-announce-request@lists.debian.org] with a subject of "unsubscribe". Trouble? Contact [e-mail:listmaster@lists.debian.org]

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Comments (2)

jhorner ·
The sooner their kernels are updated the better. I just started managing a research department who has standardized on Linux on the desktop.

Dave (if you're listening...) - I listened to your interview at TheLinuxShow, and you said that you're aggregating rss and html screen-scraped feeds. How did you do this one? email scraping?

BTW- I like your site. I'm a fan of linux and php. If you're interested, check out my article at phparch.com. It appeared in the May 2003 edition which is a free download right now. I'm curious about the code behind lxer...
dave Story submitter ·
Yes, I got this from "email scraping". I'm subscribed to all the announce/alert mailing lists for more of the distributions, and when the mail comes in, procmail automatically sends it to my LXer robot which then makes a decision, checks off the categories, and inserts it into the unposted queue.

Then I edit it to add a lead paragraph, and then approve it. Takes about 15 seconds of my time, total! :)

If you want to talk about the code at LXer go here: http://lxer.com/module/newswire/view/1/index.html

Post any questions to that story and we'll discuss there. :)

best, dave

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