Package name
Advisory ID
Affected versions
2011 i586 , 2011 x86_64

Problem description

Multiple vulnerabilities has been discovered and corrected in ISC DHCP:

An unexpected client identifier parameter can cause the ISC DHCP
daemon to segmentation fault when running in DHCPv6 mode, resulting
in a denial of service to further client requests. In order to exploit
this condition, an attacker must be able to send requests to the DHCP
server (CVE-2012-3570

An error in the handling of malformed client identifiers can cause
a DHCP server running affected versions (see Impact) to enter a
state where further client requests are not processed and the server
process loops endlessly, consuming all available CPU cycles. Under
normal circumstances this condition should not be triggered, but a
non-conforming or malicious client could deliberately trigger it in
a vulnerable server. In order to exploit this condition an attacker
must be able to send requests to the DHCP server (CVE-2012-3571

Two memory leaks have been found and fixed in ISC DHCP. Both are
reproducible when running in DHCPv6 mode (with the -6 command-line
argument.) The first leak is confirmed to only affect servers
operating in DHCPv6 mode, but based on initial code analysis the
second may theoretically affect DHCPv4 servers (though this has not
been demonstrated.) (CVE-2012-3954).

The updated packages have been upgraded to the latest version
(4.2.4-P1) which is not affected by these issues.

Updated packages

2011 i586

 5153e3eb1b4ceca9f800544d13ef6872  2011/i586/dhcp-client-4.2.4-0.P1.1.1-mdv2011.0.i586.rpm
 8c6117c838ec86e12abe5ea1efa12f85  2011/i586/dhcp-common-4.2.4-0.P1.1.1-mdv2011.0.i586.rpm
 03dd3ee3fe46a4bc255a20bc0a3f4edd  2011/i586/dhcp-devel-4.2.4-0.P1.1.1-mdv2011.0.i586.rpm
 e6fb5efee36e445626e3e52314cb24e1  2011/i586/dhcp-doc-4.2.4-0.P1.1.1-mdv2011.0.i586.rpm
 4da38e33e8542ae24e59f475a216dc88  2011/i586/dhcp-relay-4.2.4-0.P1.1.1-mdv2011.0.i586.rpm
 af313c55824cd839740cd03556b43650  2011/i586/dhcp-server-4.2.4-0.P1.1.1-mdv2011.0.i586.rpm 
 c6766b7bfe76fbbbfe19df2a08863c47  2011/SRPMS/dhcp-4.2.4-0.P1.1.1.src.rpm

2011 x86_64

 d59247271566158ed3ce91748e8bd244  2011/x86_64/dhcp-client-4.2.4-0.P1.1.1-mdv2011.0.x86_64.rpm
 66e0771c5304de4550560bd39aa40f77  2011/x86_64/dhcp-common-4.2.4-0.P1.1.1-mdv2011.0.x86_64.rpm
 37d678da37bb3b21a14a1e68619342de  2011/x86_64/dhcp-devel-4.2.4-0.P1.1.1-mdv2011.0.x86_64.rpm
 5311a79668ab721cd829061f48dbbf39  2011/x86_64/dhcp-doc-4.2.4-0.P1.1.1-mdv2011.0.x86_64.rpm
 5c59c00623d6b3a3a2130a5a467a9d33  2011/x86_64/dhcp-relay-4.2.4-0.P1.1.1-mdv2011.0.x86_64.rpm
 cc93817435d581230d1e7fcee425abb3  2011/x86_64/dhcp-server-4.2.4-0.P1.1.1-mdv2011.0.x86_64.rpm 
 c6766b7bfe76fbbbfe19df2a08863c47  2011/SRPMS/dhcp-4.2.4-0.P1.1.1.src.rpm