[USN-983-1] Sudo vulnerability

2010-09-1200:00:00

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Ubuntu Security Notice USN-983-1 September 07, 2010
sudo vulnerability
CVE-2010-2956

A security issue affects the following Ubuntu releases:

Ubuntu 9.10
Ubuntu 10.04 LTS

This advisory also applies to the corresponding versions of
Kubuntu, Edubuntu, and Xubuntu.

The problem can be corrected by upgrading your system to the
following package versions:

Ubuntu 9.10:
sudo 1.7.0-1ubuntu2.5
sudo-ldap 1.7.0-1ubuntu2.5

Ubuntu 10.04 LTS:
sudo 1.7.2p1-1ubuntu5.2
sudo-ldap 1.7.2p1-1ubuntu5.2

In general, a standard system update will make all the necessary changes.

Details follow:

Markus Wuethrich discovered that sudo did not always verify the user when a
group was specified in the Runas_Spec. A local attacker could exploit this
to execute arbitrary code as root if sudo was configured to allow the
attacker to use a program as a group when the attacker was not a part of
that group.

Updated packages for Ubuntu 9.10:

Source archives:

http://security.ubuntu.com/ubuntu/pool/main/s/sudo/sudo_1.7.0-1ubuntu2.5.diff.gz
  Size/MD5:    25514 9bfdb8f41c6a5dd5544e6d6b8ab4ac5c
http://security.ubuntu.com/ubuntu/pool/main/s/sudo/sudo_1.7.0-1ubuntu2.5.dsc
  Size/MD5:     1117 431ea989e3fa57b00f8fb13f3e54a025
http://security.ubuntu.com/ubuntu/pool/main/s/sudo/sudo_1.7.0.orig.tar.gz
  Size/MD5:   744311 5fd96bba35fe29b464f7aa6ad255f0a6

amd64 architecture (Athlon64, Opteron, EM64T Xeon):

http://security.ubuntu.com/ubuntu/pool/main/s/sudo/sudo_1.7.0-1ubuntu2.5_amd64.deb
  Size/MD5:   310700 e0e0a0dc1fb83f31f996679b9b13b01f
http://security.ubuntu.com/ubuntu/pool/universe/s/sudo/sudo-ldap_1.7.0-1ubuntu2.5_amd64.deb
  Size/MD5:   334376 9492e829a5b04057a804697e644b9644

i386 architecture (x86 compatible Intel/AMD):

http://security.ubuntu.com/ubuntu/pool/main/s/sudo/sudo_1.7.0-1ubuntu2.5_i386.deb
  Size/MD5:   298210 70b9f891286606ce2a4b1db2f3676bd4
http://security.ubuntu.com/ubuntu/pool/universe/s/sudo/sudo-ldap_1.7.0-1ubuntu2.5_i386.deb
  Size/MD5:   319766 c0df54d97c686bccea3a2b986833d44e

lpia architecture (Low Power Intel Architecture):

http://ports.ubuntu.com/pool/main/s/sudo/sudo_1.7.0-1ubuntu2.5_lpia.deb
  Size/MD5:   298316 609d145034a593e5b637c0c5b9e176b8
http://ports.ubuntu.com/pool/universe/s/sudo/sudo-ldap_1.7.0-1ubuntu2.5_lpia.deb
  Size/MD5:   320176 426ef7871e3c372491fbbd8790350857

powerpc architecture (Apple Macintosh G3/G4/G5):

http://ports.ubuntu.com/pool/main/s/sudo/sudo_1.7.0-1ubuntu2.5_powerpc.deb
  Size/MD5:   306220 7b0b1b6e6ee37e4b33a638e7f2ac292e
http://ports.ubuntu.com/pool/universe/s/sudo/sudo-ldap_1.7.0-1ubuntu2.5_powerpc.deb
  Size/MD5:   329152 1b0cb4498c03cc2883c00837bff8bb83

sparc architecture (Sun SPARC/UltraSPARC):

http://ports.ubuntu.com/pool/main/s/sudo/sudo_1.7.0-1ubuntu2.5_sparc.deb
  Size/MD5:   301892 f46d44e1a8c46a575c5c4f0700910462
http://ports.ubuntu.com/pool/universe/s/sudo/sudo-ldap_1.7.0-1ubuntu2.5_sparc.deb
  Size/MD5:   323970 7a10f46aa2c9388aa74a342d44c41ac4

Updated packages for Ubuntu 10.04:

Source archives:

http://security.ubuntu.com/ubuntu/pool/main/s/sudo/sudo_1.7.2p1-1ubuntu5.2.diff.gz
  Size/MD5:    26583 f3077ddbefcc852cb66d71ec63e0013c
http://security.ubuntu.com/ubuntu/pool/main/s/sudo/sudo_1.7.2p1-1ubuntu5.2.dsc
  Size/MD5:     1131 456ecc22f3b88cb3e60dbfac679b110a
http://security.ubuntu.com/ubuntu/pool/main/s/sudo/sudo_1.7.2p1.orig.tar.gz
  Size/MD5:   771059 4449d466a774f5ce401c9c0e3866c026

amd64 architecture (Athlon64, Opteron, EM64T Xeon):

http://security.ubuntu.com/ubuntu/pool/main/s/sudo/sudo_1.7.2p1-1ubuntu5.2_amd64.deb
  Size/MD5:   326768 29f77801c5304c74366abaecd451080b
http://security.ubuntu.com/ubuntu/pool/universe/s/sudo/sudo-ldap_1.7.2p1-1ubuntu5.2_amd64.deb
  Size/MD5:   350566 08c716ab408e519bb090e2a46715696c

i386 architecture (x86 compatible Intel/AMD):

http://security.ubuntu.com/ubuntu/pool/main/s/sudo/sudo_1.7.2p1-1ubuntu5.2_i386.deb
  Size/MD5:   312528 8bdaeb041859991919aade6a85c70cd1
http://security.ubuntu.com/ubuntu/pool/universe/s/sudo/sudo-ldap_1.7.2p1-1ubuntu5.2_i386.deb
  Size/MD5:   334432 bf7f83603498e26e4f7618eea82cb836

powerpc architecture (Apple Macintosh G3/G4/G5):

http://ports.ubuntu.com/pool/main/s/sudo/sudo_1.7.2p1-1ubuntu5.2_powerpc.deb
  Size/MD5:   321234 498592d623ad408c02dc9dc3794674ae
http://ports.ubuntu.com/pool/universe/s/sudo/sudo-ldap_1.7.2p1-1ubuntu5.2_powerpc.deb
  Size/MD5:   345118 09a20cd3444df0ac4ac34b0829332fac

sparc architecture (Sun SPARC/UltraSPARC):

http://ports.ubuntu.com/pool/main/s/sudo/sudo_1.7.2p1-1ubuntu5.2_sparc.deb
  Size/MD5:   318604 71c8f38d47ed96f07d53192ed729c4e9
http://ports.ubuntu.com/pool/universe/s/sudo/sudo-ldap_1.7.2p1-1ubuntu5.2_sparc.deb
  Size/MD5:   341828 99b090b6d40959d6d349439e0e8934ba