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                                    CERT-Renater

                         Note d'Information No. 2011/VULN312
_____________________________________________________________________

DATE                      : 12/04/2011

HARDWARE PLATFORM(S)      : /

OPERATING SYSTEM(S)       : Debian versions lenny, squeeze, wheezy, sid
                              running dhcp3 versions prior to 3.1.1-6+lenny5,
                                      isc-dhcp versions prior to 4.1.1-P1-15+squeeze2, 4.1.1-P1-16.1	.

======================================================================
http://lists.debian.org/debian-security-announce/2011/msg00085.html
http://lists.debian.org/debian-security-announce/2011/msg00086.html
______________________________________________________________________

- -------------------------------------------------------------------------
Debian Security Advisory DSA-2216-1                   security@debian.org
http://www.debian.org/security/                                Nico Golde
April 10, 2011                         http://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package        : isc-dhcp
Vulnerability  : missing input sanitization
Problem type   : remote
Debian-specific: no
CVE ID         : CVE-2011-0997
Debian bug     : 621099

Sebastian Krahmer and Marius Tomaschewski discovered that dhclient of
isc-dhcp, a DHCP client, is not properly filtering shell meta-characters
in certain options in DHCP server responses.  These options are reused in
an insecure fashion by dhclient scripts.  This allows an attacker to execute
arbitrary commands with the privileges of such a process by sending crafted
DHCP options to a client using a rogue server.


For the oldstable distribution (lenny), this problem has been fixed in
additional update for dhcp3.

For the stable distribution (squeeze), this problem has been fixed in
version 4.1.1-P1-15+squeeze2.

For the testing distribution (wheezy), this problem will be fixed soon.

For the unstable distribution (sid), this problem has been fixed in
version 4.1.1-P1-16.1.


We recommend that you upgrade your isc-dhcp packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org
_______________________________________________________________________

- -------------------------------------------------------------------------
Debian Security Advisory DSA-2217-1                   security@debian.org
http://www.debian.org/security/                                Nico Golde
April 10, 2011                         http://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package        : dhcp3
Vulnerability  : missing input sanitization
Problem type   : remote
Debian-specific: no
CVE ID         : CVE-2011-0997

Sebastian Krahmer and Marius Tomaschewski discovered that dhclient of
dhcp3, a DHCP client, is not properly filtering shell meta-characters
in certain options in DHCP server responses.  These options are reused in
an insecure fashion by dhclient scripts.  This allows an attacker to execute
arbitrary commands with the privileges of such a process by sending crafted
DHCP options to a client using a rogue server.


For the oldstable distribution (lenny), this problem has been fixed in
version 3.1.1-6+lenny5.

For the stable (squeeze), testing (wheezy) and unstable (sid) distributions,
this problem has been fixed in an additional update for isc-dhcp.


We recommend that you upgrade your dhcp3 packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org



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