Debian alert: New Linux 2.4.17 packages fix several local root exploits (powerpc/apus)

Posted by dave on Feb 18, 2004 6:02 AM EDT
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Several local root exploits have been discovered recently in the Linux kernel. This security advisory updates the PowerPC/Apus kernel for Debian GNU/Linux. The Common Vulnerabilities and Exposures project identifies the following problems that are fixed with this update:

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- -------------------------------------------------------------------------- Debian Security Advisory DSA 440-1 [e-mail:security@debian.org] http://www.debian.org/security/ Martin Schulze February 18th, 2004 http://www.debian.org/security/faq - --------------------------------------------------------------------------

Package : kernel-source-2.4.17, kernel-patch-2.4.17-apus 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 PowerPC/Apus kernel 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 2.4.17-4 of powerpc/apus images.

Other architectures will probably mentioned in a separate advisory or are not affected (m68k).

For the unstable distribution (sid) this problem will be fixed soon.

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-2.4.17/kernel-source-2.4.17_2.4.17-1woody2.dsc Size/MD5 checksum: 690 f4f41d8b5ce68462139eadff5e340b2f http://security.debian.org/pool/updates/main/k/kernel-source-2.4.17/kernel-source-2.4.17_2.4.17-1woody2.diff.gz Size/MD5 checksum: 38791 17b8f97671d0f1be7c595123bcf0c86c http://security.debian.org/pool/updates/main/k/kernel-source-2.4.17/kernel-source-2.4.17_2.4.17.orig.tar.gz Size/MD5 checksum: 29445154 d5de2a4dc49e32c37e557ef856d5d132

http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-apus/kernel-patch-2.4.17-apus_2.4.17-4.dsc Size/MD5 checksum: 667 beff21e365dba9487c3d1009e6bb8ce7 http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-apus/kernel-patch-2.4.17-apus_2.4.17-4.tar.gz Size/MD5 checksum: 489649 3feef2fdda2cb1385e12fb18b33c3787

Architecture independent components:

http://security.debian.org/pool/updates/main/k/kernel-source-2.4.17/kernel-doc-2.4.17_2.4.17-1woody2_all.deb Size/MD5 checksum: 1719904 4299b7aeebc01ede7eb5a2f2f5ba0b45 http://security.debian.org/pool/updates/main/k/kernel-source-2.4.17/kernel-source-2.4.17_2.4.17-1woody2_all.deb Size/MD5 checksum: 23878388 15202df8a94f2aa17f09382f520021fc

PowerPC architecture:

http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-apus/kernel-headers-2.4.17-apus_2.4.17-4_powerpc.deb Size/MD5 checksum: 3365696 0f03db43dd1c83a6c02cbd474ae54685 http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-apus/kernel-image-2.4.17-apus_2.4.17-4_powerpc.deb Size/MD5 checksum: 2210948 1f12b255f6644f144e3426fa5865b27e http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-apus/kernel-image-apus_2.4.17-4_powerpc.deb Size/MD5 checksum: 4078 6a495ea4088b900129c60dd769f7da8d http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.17-apus/kernel-patch-2.4.17-apus_2.4.17-4_powerpc.deb Size/MD5 checksum: 490346 41eebb692f46cfcb118818048de6d6ad

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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