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Sicherheit: Fehlende Rückgabewertprüfung in mremap im Kernel (Kernel 2.4.16)
Aktuelle Meldungen Distributionen
Name: Fehlende Rückgabewertprüfung in mremap im Kernel (Kernel 2.4.16)
ID: DSA-439-1
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

Originalnachricht

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Debian Security Advisory DSA 439-1 security@debian.org
http://www.debian.org/security/ Martin Schulze
February 18th, 2004 http://www.debian.org/security/faq
--------------------------------------------------------------------------

Package : kernel-image-2.4.16-lart, kernel-image-2.4.16-netwinder,
kernel-image-2.4.16-riscpc, kernel-patch-2.4.16-arm
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) this problem has been fixed in
version 2.4.26/20040204 of lart, netwinder and riscpc image and in
version 20040204 of kernel-patch-2.4.16-arm.

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

For the unstable distribution (sid) these problems 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-patch-2.4.16-arm_20040204.dsc
Size/MD5 checksum: 562 7bd0b443e490132da8f26188ca560f75
kernel-patch-2.4.16-arm_20040204.tar.gz
Size/MD5 checksum: 579045 853b5f05e03217dfb47f28cf852dca4c

kernel-image-2.4.16-lart_20040204.dsc
Size/MD5 checksum: 586 e2cb96946739cfffd4327ae1e218a982
kernel-image-2.4.16-lart_20040204.tar.gz
Size/MD5 checksum: 16443 9b5b8c8311cc6ba23abc2e121882281a

kernel-image-2.4.16-netwinder_20040204.dsc
Size/MD5 checksum: 624 d2258e373574684da142a45ecfc4312f
kernel-image-2.4.16-netwinder_20040204.tar.gz
Size/MD5 checksum: 21783 fc07fb8db829045ef9a8ee6881e1af48

kernel-image-2.4.16-riscpc_20040204.dsc
Size/MD5 checksum: 592 f2252946f185d1c52796a68a1d442cb0
kernel-image-2.4.16-riscpc_20040204.tar.gz
Size/MD5 checksum: 19104 144bfd5b87a5daccf879049334b24bcd

Architecture independent components:

kernel-patch-2.4.16-arm_20040204_all.deb
Size/MD5 checksum: 583148 6a4951879008cc3d882d6a30112d0cbc

ARM architecture:

kernel-image-2.4.16-lart_20040204_arm.deb
Size/MD5 checksum: 717092 eb20d52fed79cfe95981f1838bc38e0c

kernel-headers-2.4.16_20040204_arm.deb
Size/MD5 checksum: 3421140 3e0dfbdcb48437ab733d43c92deb0157
kernel-image-2.4.16-netwinder_20040204_arm.deb
Size/MD5 checksum: 6671136 72f1f771e847c593e83179b6dbda4074

kernel-image-2.4.16-riscpc_20040204_arm.deb
Size/MD5 checksum: 2910348 c4fab31d10a137738aeb722eb7358488


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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