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Home » Security Advisories» Debian » Sudo missing input sanitising

Sudo missing input sanitising

The former correction to vulnerabilities in the sudo package worked fine but were too strict for some environments. Therefore we have reviewed the changes again and allowed some environment variables to go back into the privileged execution environment. Hence, this update.

  • Vendor: Debian
  • Vendor ID: DSA 946-2
  • Date: April 08, 2006


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Debian Security Advisory DSA 946-2 [email protected]
http://www.debian.org/security/ Martin Schulze
April 8th, 2006 http://www.debian.org/security/faq
- --------------------------------------------------------------------------

Package : sudo
Vulnerability : missing input sanitising
Problem type : local
Debian-specific: no
CVE IDs : CVE-2005-4158 CVE-2006-0151
Debian Bug : 342948

The former correction to vulnerabilities in the sudo package worked
fine but were too strict for some environments. Therefore we have
reviewed the changes again and allowed some environment variables to
go back into the privileged execution environment. Hence, this
update.

The configuration option "env_reset" is now activated by default. It
will preserve only the environment variables HOME, LOGNAME, PATH,
SHELL, TERM, DISPLAY, XAUTHORITY, XAUTHORIZATION, LANG, LANGUAGE,
LC_*, and USER in addition to the separate SUDO_* variables.

For completeness please find below the original advisory text:

It has been discovered that sudo, a privileged program, that
provides limited super user privileges to specific users, passes
several environment variables to the program that runs with
elevated privileges. In the case of include paths (e.g. for Perl,
Python, Ruby or other scripting languages) this can cause arbitrary
code to be executed as privileged user if the attacker points to a
manipulated version of a system library.

This update alters the former behaviour of sudo and limits the
number of supported environment variables to LC_*, LANG, LANGUAGE
and TERM. Additional variables are only passed through when set as
env_check in /etc/sudoers, which might be required for some scripts
to continue to work.

For the old stable distribution (woody) this problem has been fixed in
version 1.6.6-1.6.

For the stable distribution (sarge) this problem has been fixed in
version 1.6.8p7-1.4.

For the unstable distribution (sid) the same behaviour will be
implemented soon.

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/s/sudo/sudo_1.6.6-1.6.dsc
Size/MD5 checksum: 589 fda4d1382149f25cfebf1699db73c2aa
http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.6-1.6.diff.gz
Size/MD5 checksum: 14121 396faaedb67ff76a247a6946cae23d51
http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.6.orig.tar.gz
Size/MD5 checksum: 333074 4da4bf6cf31634cc7a17ec3b69fdc333

Alpha architecture:

http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.6-1.6_alpha.deb
Size/MD5 checksum: 152548 bbf4346a6956e646b5dd0c73059bb97c

ARM architecture:

http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.6-1.6_arm.deb
Size/MD5 checksum: 142328 3f58b32ce7cb6334c391e53da32e6fcd

Intel IA-32 architecture:

http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.6-1.6_i386.deb
Size/MD5 checksum: 135988 90c493e545de6fb4e69041ff3adb5e64

Intel IA-64 architecture:

http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.6-1.6_ia64.deb
Size/MD5 checksum: 173384 8db6ba716e87235971e32e87d03f2c40

HP Precision architecture:

http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.6-1.6_hppa.deb
Size/MD5 checksum: 148504 87976f60402cac2cee6e7d58f7dd63c8

Motorola 680x0 architecture:

http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.6-1.6_m68k.deb
Size/MD5 checksum: 133596 fe52aae580b7b0bc3ff9ac36012cede0

Big endian MIPS architecture:

http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.6-1.6_mips.deb
Size/MD5 checksum: 145228 933f52b4795e5acd1d69a10d569165b5

Little endian MIPS architecture:

http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.6-1.6_mipsel.deb
Size/MD5 checksum: 145094 a4d7a6bdb7f26c1f29494a11ccf97a74

PowerPC architecture:

http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.6-1.6_powerpc.deb
Size/MD5 checksum: 141508 fd135af083103859e484e52119464662

IBM S/390 architecture:

http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.6-1.6_s390.deb
Size/MD5 checksum: 141078 2b5d766cce3ca1b94539d4965e97c01b

Sun Sparc architecture:

http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.6-1.6_sparc.deb
Size/MD5 checksum: 143808 39b46d2ca3289c4f2bd7d0228fc4eef7


Debian GNU/Linux 3.1 alias sarge
- --------------------------------

Source archives:

http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.8p7-1.4.dsc
Size/MD5 checksum: 573 40676c986431100eef088b1f3b3c1e03
http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.8p7-1.4.diff.gz
Size/MD5 checksum: 21602 6cf5325a202a70e62c2a662e9de3d6c5
http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.8p7.orig.tar.gz
Size/MD5 checksum: 585302 ad65d24f20c736597360d242515e412c

Alpha architecture:

http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.8p7-1.4_alpha.deb
Size/MD5 checksum: 177688 64d7d8eb1188d58f197e121c55ce9ca0

AMD64 architecture:

http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.8p7-1.4_amd64.deb
Size/MD5 checksum: 171058 6870002928d01d45e0a5287cc2017a70

ARM architecture:

http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.8p7-1.4_arm.deb
Size/MD5 checksum: 164372 31031e0fc73dd4a1a6cc57a44b514f88

Intel IA-32 architecture:

http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.8p7-1.4_i386.deb
Size/MD5 checksum: 160676 9eda34ab034ad6ab65e4f3ea1876015e

Intel IA-64 architecture:

http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.8p7-1.4_ia64.deb
Size/MD5 checksum: 195934 1df26a3372ea03ac840a40266fbf48d6

HP Precision architecture:

http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.8p7-1.4_hppa.deb
Size/MD5 checksum: 171542 8e0ad3c6f597e27169864daf90eccb16

Motorola 680x0 architecture:

http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.8p7-1.4_m68k.deb
Size/MD5 checksum: 155874 900bed288f532882a0cccb798f871d77

Big endian MIPS architecture:

http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.8p7-1.4_mips.deb
Size/MD5 checksum: 169346 0f2094e3a4c51c83e9975b57a48b15a2

Little endian MIPS architecture:

http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.8p7-1.4_mipsel.deb
Size/MD5 checksum: 169392 6be4e3681b8dc4ddc9777ed1f186285f

PowerPC architecture:

http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.8p7-1.4_powerpc.deb
Size/MD5 checksum: 166290 76386481e58f6cfcd53c394877792950

IBM S/390 architecture:

http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.8p7-1.4_s390.deb
Size/MD5 checksum: 169100 bab22d31f43acc189ec97458f5047133

Sun Sparc architecture:

http://security.debian.org/pool/updates/main/s/sudo/sudo_1.6.8p7-1.4_sparc.deb
Size/MD5 checksum: 163168 e0cdf1a6ed38504a0b31904aa7c654cc



These files will probably be moved into the stable distribution on
its next update.

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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: [email protected]
Package info: `apt-cache show ' and http://packages.debian.org/

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