bugtraq - [USN-56-1] exim4 vulnerabilities

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Message-ID: <20050107125549.GA2757@box79162.elkhouse.de>
Date: Fri, 7 Jan 2005 13:55:49 +0100
From: Martin Pitt <martin.pitt@...onical.com>
To: ubuntu-security-announce@...ts.ubuntu.com
Cc: bugtraq@...urityfocus.com, full-disclosure@...ts.netsys.com
Subject: [USN-56-1] exim4 vulnerabilities

===========================================================
Ubuntu Security Notice USN-56-1		   January 07, 2005
exim4 vulnerabilities
CAN-2005-0021, CAN-2005-0022
===========================================================

A security issue affects the following Ubuntu releases:

Ubuntu 4.10 (Warty Warthog)

The following packages are affected:

exim4-daemon-heavy
exim4-daemon-light

The problem can be corrected by upgrading the affected package to
version 4.34-5ubuntu1.1. In general, a standard system upgrade is
sufficient to effect the necessary changes.

Details follow:

A flaw has been found in the host_aton() function, which can overflow
a buffer if it is presented with an illegal IPv6 address that has more
than 8 components. When supplying certain command line parameters, the
input was not checked, so that a local attacker could possibly exploit
the buffer overflow to run arbitrary code with the privileges of the
Exim mail server. (CAN-2005-0021)

Additionally, the BASE64 decoder in the SPA authentication handler did
not check the size of its output buffer. By sending an invalid BASE64
authentication string, a remote attacker could overflow the buffer,
which could possibly be exploited to run arbitrary code with the
privileges of the Exim mail server. (CAN-2005-0022)

  Source archives:

    http://security.ubuntu.com/ubuntu/pool/main/e/exim4/exim4_4.34-5ubuntu1.1.diff.gz
      Size/MD5:   463699 cdb8d46e351c34fc1f89536fdae343da
    http://security.ubuntu.com/ubuntu/pool/main/e/exim4/exim4_4.34-5ubuntu1.1.dsc
      Size/MD5:     1080 864fe588fae6035a5e258f5c04cf7dab
    http://security.ubuntu.com/ubuntu/pool/main/e/exim4/exim4_4.34.orig.tar.gz
      Size/MD5:  1717473 acdf7117f18b71702d4da284b1263275

  Architecture independent packages:

    http://security.ubuntu.com/ubuntu/pool/main/e/exim4/exim4-config_4.34-5ubuntu1.1_all.deb
      Size/MD5:   171766 9c845bd86beaee3d52c42c813b1ad032
    http://security.ubuntu.com/ubuntu/pool/universe/e/exim4/exim4_4.34-5ubuntu1.1_all.deb
      Size/MD5:     1200 5cd02a62d88ba49c5df8008938ef4f65

  amd64 architecture (Athlon64, Opteron, EM64T Xeon)

    http://security.ubuntu.com/ubuntu/pool/main/e/exim4/exim4-base_4.34-5ubuntu1.1_amd64.deb
      Size/MD5:   787866 e748245e594745259b3708545aa6c4b1
    http://security.ubuntu.com/ubuntu/pool/main/e/exim4/exim4-daemon-heavy_4.34-5ubuntu1.1_amd64.deb
      Size/MD5:   431982 a3027eeb99010ec3fbbd9ed8d7602c6b
    http://security.ubuntu.com/ubuntu/pool/main/e/exim4/exim4-daemon-light_4.34-5ubuntu1.1_amd64.deb
      Size/MD5:   360702 407afc6744039f296993d4a0b0d07203
    http://security.ubuntu.com/ubuntu/pool/universe/e/exim4/eximon4_4.34-5ubuntu1.1_amd64.deb
      Size/MD5:    73474 22e6e191c1a624555ddcb0dbef570398

  i386 architecture (x86 compatible Intel/AMD)

    http://security.ubuntu.com/ubuntu/pool/main/e/exim4/exim4-base_4.34-5ubuntu1.1_i386.deb
      Size/MD5:   784452 20baa66e23f89210828da736e978dcf2
    http://security.ubuntu.com/ubuntu/pool/main/e/exim4/exim4-daemon-heavy_4.34-5ubuntu1.1_i386.deb
      Size/MD5:   406080 0fca8d0a724c1028847e4770640abd00
    http://security.ubuntu.com/ubuntu/pool/main/e/exim4/exim4-daemon-light_4.34-5ubuntu1.1_i386.deb
      Size/MD5:   336978 b479636f03f2f370443109e7d69a8a4b
    http://security.ubuntu.com/ubuntu/pool/universe/e/exim4/eximon4_4.34-5ubuntu1.1_i386.deb
      Size/MD5:    69218 e230f352300632a19d0f36ef8c4b6ca7

  powerpc architecture (Apple Macintosh G3/G4/G5)

    http://security.ubuntu.com/ubuntu/pool/main/e/exim4/exim4-base_4.34-5ubuntu1.1_powerpc.deb
      Size/MD5:   792338 4f59dfd48441b4ba58cf7379278b5414
    http://security.ubuntu.com/ubuntu/pool/main/e/exim4/exim4-daemon-heavy_4.34-5ubuntu1.1_powerpc.deb
      Size/MD5:   437952 7c0e3eb42f5aaf21c56571e4ce76e863
    http://security.ubuntu.com/ubuntu/pool/main/e/exim4/exim4-daemon-light_4.34-5ubuntu1.1_powerpc.deb
      Size/MD5:   364814 d89db8c70e78070c8cad5e64e99702ab
    http://security.ubuntu.com/ubuntu/pool/universe/e/exim4/eximon4_4.34-5ubuntu1.1_powerpc.deb
      Size/MD5:    74848 6e9f16cbaf431df8412748c98ba2561b

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