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Sicherheit: Fehlende Rückgabewertprüfung in mremap im Kernel (Source, Apus)
Aktuelle Meldungen Distributionen
Name: Fehlende Rückgabewertprüfung in mremap im Kernel (Source, Apus)
ID: DSA-440-1
Distribution: Debian
Plattformen: Debian woody
Datum: Do, 19. Februar 2004, 12:00
Referenzen: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2003-0961
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2003-0985
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0077
Applikationen: Linux, Linux

Originalnachricht

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Debian Security Advisory DSA 440-1 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:

kernel-source-2.4.17_2.4.17-1woody2.dsc
Size/MD5 checksum: 690 f4f41d8b5ce68462139eadff5e340b2f
kernel-source-2.4.17_2.4.17-1woody2.diff.gz
Size/MD5 checksum: 38791 17b8f97671d0f1be7c595123bcf0c86c
kernel-source-2.4.17_2.4.17.orig.tar.gz
Size/MD5 checksum: 29445154 d5de2a4dc49e32c37e557ef856d5d132

kernel-patch-2.4.17-apus_2.4.17-4.dsc
Size/MD5 checksum: 667 beff21e365dba9487c3d1009e6bb8ce7
kernel-patch-2.4.17-apus_2.4.17-4.tar.gz
Size/MD5 checksum: 489649 3feef2fdda2cb1385e12fb18b33c3787

Architecture independent components:

kernel-doc-2.4.17_2.4.17-1woody2_all.deb
Size/MD5 checksum: 1719904 4299b7aeebc01ede7eb5a2f2f5ba0b45
kernel-source-2.4.17_2.4.17-1woody2_all.deb
Size/MD5 checksum: 23878388 15202df8a94f2aa17f09382f520021fc

PowerPC architecture:

kernel-headers-2.4.17-apus_2.4.17-4_powerpc.deb
Size/MD5 checksum: 3365696 0f03db43dd1c83a6c02cbd474ae54685
kernel-image-2.4.17-apus_2.4.17-4_powerpc.deb
Size/MD5 checksum: 2210948 1f12b255f6644f144e3426fa5865b27e
kernel-image-apus_2.4.17-4_powerpc.deb
Size/MD5 checksum: 4078 6a495ea4088b900129c60dd769f7da8d
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-securitydists/stable/updates/main
Mailing list: debian-security-announce@lists.debian.org
Package info: `apt-cache show <pkg>' and http://packages.debian.org/<pkg>

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