SecurityTracker.com Archives - (Debian Issues Fix) Linux Kernel do_mremap() Fails to Check do_munmap() Return Values, Allowing a Local User to Gain Root Privileges

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Category: OS (Linux) > Linux Kernel

Vendors: kernel.org

(Debian Issues Fix) Linux Kernel do_mremap() Fails to Check do_munmap() Return Values, Allowing a Local User to Gain Root Privileges

SecurityTracker Alert ID: 1009097

CVE Reference: CAN-2004-0077 (Links to External Site)

Date: Feb 18 2004

Impact: Execution of arbitrary code via local system, Root access via local system

Fix Available: Yes Vendor Confirmed: Yes

Version(s): Debian 3.0

Description: Another vulnerability was reported in the Linux kernel do_mremap() function. A local user can execute arbitrary code with root privileges.

Paul Starzetz discovered and reported that there is a missing return value check within the mremap(2) system call.

When resizing or moving virtual memory areas, the function reportedly does not test the return value of the do_munmap() function. Cases where the function fails (for example, due to the number of virtual memory areas being exceeded by the calling process) will not be properly detected, according to the report. As a result, the kernel may move memory belonging to one process into memory space that is allocated to another process.

Some other calls to the do_munmap() function are also not checked, the report said.

A local user can gain root privileges on the target system.

The original advisory is available at:

http://isec.pl/vulnerabilities/isec-0014-mremap-unmap.txt

Impact: A local user can gain root privileges on the target system.

Vendor URL: www.kernel.org/ (Links to External Site)

Cause: Boundary error

Underlying OS: Linux (Debian)

Reported By: joey@infodrom.org (Martin Schulze)

Message History: This archive entry is a follow-up to the message listed below.

Feb 18 2004

Linux Kernel do_mremap() Fails to Check do_munmap() Return Values, Allowing a Local User to Gain Root Privileges

Source Message Contents

Date: Wed, 18 Feb 2004 14:29:42 +0100 (CET)
From: joey@infodrom.org (Martin Schulze)
Subject: [SECURITY] [DSA 438-1] New Linux 2.4.18 packages fix local root exploit (alpha+i386+powerpc)

 

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

- --------------------------------------------------------------------------
Debian Security Advisory DSA 438-1                     security@debian.org
http://www.debian.org/security/                             Martin Schulze
February 18th, 2004                     http://www.debian.org/security/faq
- --------------------------------------------------------------------------

Package        : kernel-source-2.4.18, kernel-image-2.4.18-1-alpha, kernel-image-2.4.18-1-i386, kerne
l-image-2.4.18-i386bf, kernel-patch-2.4.18-powerpc
Vulnerability  : missing function return value check
Problem-Type   : local
Debian-specific: no
CVE ID         : 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.

For the stable distribution (woody) this problem has been fixed in
version 2.4.18-14.2 of kernel-source, version 2.4.18-14 of alpha
images, version 2.4.18-12.2 of i386 images, version 2.4.18-5woody7
of i386bf images and version 2.4.18-1woody4 of powerpc images.

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

For the unstable distribution (sid) this problem is fixed in version
2.4.24-3 for source, i386 and alpha images and version 2.4.22-10 for
powerpc images.

This problem is also fixed in the upstream version of Linux 2.4.25 and
2.6.3.

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-2.4.18/kernel-source-2.4.18_2.4.18-1
4.2.dsc
      Size/MD5 checksum:      664 38e578dda3dd54a5daa6b8badcac1a58
    http://security.debian.org/pool/updates/main/k/kernel-source-2.4.18/kernel-source-2.4.18_2.4.18-1
4.2.diff.gz
      Size/MD5 checksum:    67490 e1ef6246f639481dfd8b3c5b15d8668e
    http://security.debian.org/pool/updates/main/k/kernel-source-2.4.18/kernel-source-2.4.18_2.4.18.o
rig.tar.gz
      Size/MD5 checksum: 29818323 24b4c45a04a23eb4ce465eb326a6ddf2

    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-alpha/kernel-image-2.4.18-1-
alpha_2.4.18-14.dsc
      Size/MD5 checksum:      876 7774c946590a5a80332ca920f67cc8ec
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-alpha/kernel-image-2.4.18-1-
alpha_2.4.18-14.tar.gz
      Size/MD5 checksum:    24477 b9c0ba46774c2da3be69851110d6f2f9

    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-image-2.4.18-1-i
386_2.4.18-12.2.dsc
      Size/MD5 checksum:     1193 b44a4e8f803bb2214bd0c4c3e9f88d81
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-image-2.4.18-1-i
386_2.4.18-12.2.tar.gz
      Size/MD5 checksum:    70044 f4caad005d02a1c7cadfa73bfc4952fb

    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-i386bf/kernel-image-2.4.18-i38
6bf_2.4.18-5woody7.dsc
      Size/MD5 checksum:      656 e091295663f495df0ea8273703decef0
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-i386bf/kernel-image-2.4.18-i38
6bf_2.4.18-5woody7.tar.gz
      Size/MD5 checksum:    26249 f84d855e356c1f5290f6fe96d9e039c8

    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.18-powerpc/kernel-patch-2.4.18-po
werpc_2.4.18-1woody4.dsc
      Size/MD5 checksum:      713 7f68980058d55c40a037c6666354ffe9
    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.18-powerpc/kernel-patch-2.4.18-po
werpc_2.4.18-1woody4.tar.gz
      Size/MD5 checksum:    79541 bff712e95a6960659a0e96dab9732ed4

  Architecture independent components:

    http://security.debian.org/pool/updates/main/k/kernel-source-2.4.18/kernel-doc-2.4.18_2.4.18-14.2
_all.deb
      Size/MD5 checksum:  1719692 32cb6638a9be7e7f7332152c04854bba
    http://security.debian.org/pool/updates/main/k/kernel-source-2.4.18/kernel-source-2.4.18_2.4.18-1
4.2_all.deb
      Size/MD5 checksum: 24133918 306f15a8a6279221394b6a8ac2c5a69c

    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.18-powerpc/kernel-patch-2.4.18-po
werpc_2.4.18-1woody4_all.deb
      Size/MD5 checksum:    79274 8ea5d169fd45e464c1213e729e4e5368

  Alpha architecture:

    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-alpha/kernel-headers-2.4.18-
1_2.4.18-14_alpha.deb
      Size/MD5 checksum:  3363042 9ee4da919ccec99281efdaaae303af73
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-alpha/kernel-headers-2.4.18-
1-generic_2.4.18-14_alpha.deb
      Size/MD5 checksum:  3512422 47b306297211fd7079abb918bb10ef37
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-alpha/kernel-headers-2.4.18-
1-smp_2.4.18-14_alpha.deb
      Size/MD5 checksum:  3515048 d0153184a825640d1fe64b905ab98de4
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-alpha/kernel-image-2.4.18-1-
generic_2.4.18-14_alpha.deb
      Size/MD5 checksum: 12425644 aa320665938f55d33bfc8a9593e4639f
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-alpha/kernel-image-2.4.18-1-
smp_2.4.18-14_alpha.deb
      Size/MD5 checksum: 12800414 2901b9a0ff3cabfbb4249ee2cbb94b43

  Intel IA-32 architecture:

    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-headers-2.4.18-1
_2.4.18-12.2_i386.deb
      Size/MD5 checksum:  3412982 cad64cfd789bfa49fe5463a3b4a8a5bd
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-headers-2.4.18-1
-386_2.4.18-12.2_i386.deb
      Size/MD5 checksum:  3503440 02c707f32c72f98df9002c04006aae6b
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-headers-2.4.18-1
-586tsc_2.4.18-12.2_i386.deb
      Size/MD5 checksum:  3504340 bd5e69e90ab3be3378f588abbfe23c79
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-headers-2.4.18-1
-686_2.4.18-12.2_i386.deb
      Size/MD5 checksum:  3504232 6ab9026a1484be3aaf7fa08217ae9c5c
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-headers-2.4.18-1
-686-smp_2.4.18-12.2_i386.deb
      Size/MD5 checksum:  3505300 2ffc58a24a13bf0991be5b982026b6c5
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-headers-2.4.18-1
-k6_2.4.18-12.2_i386.deb
      Size/MD5 checksum:  3504034 a448bb692b10914a3a7f7f1d9b16be96
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-headers-2.4.18-1
-k7_2.4.18-12.2_i386.deb
      Size/MD5 checksum:  3504256 349318073fbd9b6f3eae2b7bc5d65b54
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-image-2.4.18-1-3
86_2.4.18-12.2_i386.deb
      Size/MD5 checksum:  8797608 df96f2969970f149992e74cfd7838919
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-image-2.4.18-1-5
86tsc_2.4.18-12.2_i386.deb
      Size/MD5 checksum:  8704208 b29d3a133a3d5485645a1428045481f2
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-image-2.4.18-1-6
86_2.4.18-12.2_i386.deb
      Size/MD5 checksum:  8703628 fdf8ddc2c2fdc0c5ceffb9f34b8dc00f
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-image-2.4.18-1-6
86-smp_2.4.18-12.2_i386.deb
      Size/MD5 checksum:  8959706 da0efa81b152f5ce0e949ba00a58b1f0
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-image-2.4.18-1-k
6_2.4.18-12.2_i386.deb
      Size/MD5 checksum:  8660826 78ee935b25e3cb8e1d6affc13e78aa35
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-image-2.4.18-1-k
7_2.4.18-12.2_i386.deb
      Size/MD5 checksum:  8863038 8b0605e449390dfd819e5543c79fe0e3
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-pcmcia-modules-2
.4.18-1-386_2.4.18-12.2_i386.deb
      Size/MD5 checksum:   228532 83d533868f288d4bd7866cf4b3114321
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-pcmcia-modules-2
.4.18-1-586tsc_2.4.18-12.2_i386.deb
      Size/MD5 checksum:   228084 dca93798c731513d7f8908c591fc4992
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-pcmcia-modules-2
.4.18-1-686_2.4.18-12.2_i386.deb
      Size/MD5 checksum:   227546 99c579382f1c93af23cdedb9dfdce997
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-pcmcia-modules-2
.4.18-1-686-smp_2.4.18-12.2_i386.deb
      Size/MD5 checksum:   231188 cae74563956d0a8757994959b101e5c0
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-pcmcia-modules-2
.4.18-1-k6_2.4.18-12.2_i386.deb
      Size/MD5 checksum:   227180 eb3383f20e4123b964a6143fae4be03b
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-1-i386/kernel-pcmcia-modules-2
.4.18-1-k7_2.4.18-12.2_i386.deb
      Size/MD5 checksum:   230440 e4875246851ee5dd470bf61af43e2ef6

    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-i386bf/kernel-headers-2.4.18-b
f2.4_2.4.18-5woody7_i386.deb
      Size/MD5 checksum:  3410436 8238f8f8d03b19071ca774e611c83cd5
    http://security.debian.org/pool/updates/main/k/kernel-image-2.4.18-i386bf/kernel-image-2.4.18-bf2
.4_2.4.18-5woody7_i386.deb
      Size/MD5 checksum:  6425110 e7e25ace06cd1edbb6967c3cae155e09

  PowerPC architecture:

    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.18-powerpc/kernel-headers-2.4.18_
2.4.18-1woody4_powerpc.deb
      Size/MD5 checksum:  3432656 4116a684a091bbc46a94fcafc03ba50a
    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.18-powerpc/kernel-image-2.4.18-ne
wpmac_2.4.18-1woody4_powerpc.deb
      Size/MD5 checksum:  9452588 ca305391d3dfe3aa0ab140a047d67df2
    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.18-powerpc/kernel-image-2.4.18-po
werpc_2.4.18-1woody4_powerpc.deb
      Size/MD5 checksum: 10101958 d427f943297e02355545d7fa1a2ab263
    http://security.debian.org/pool/updates/main/k/kernel-patch-2.4.18-powerpc/kernel-image-2.4.18-po
werpc-smp_2.4.18-1woody4_powerpc.deb
      Size/MD5 checksum: 10345492 4d6e160cb19df083c4d238f8ff1e4913


  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: debian-security-announce@lists.debian.org
Package info: `apt-cache show <pkg>' and http://packages.debian.org/<pkg>

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