Mageia alert MGASA-2012-0256 (dhcp)

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Mageia Updates <buildsystem-daemon@mageia.org> 
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[updates-announce] MGASA-2012-0256: dhcp-4.2.4-0.P1.1.mga1
 (1/core), dhcp-4.2.4P1-1.1.mga2 (2/core) 
Date:
    	     
 
Fri, 7 Sep 2012 20:11:47 +0200
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<20120907181147.GA15006@valstar.mageia.org>
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Article, Thread
              
MGASA-2012-0256
Date: 	September 7th, 2012
Affected releases: 	1, 2


Description:
Updated dhcp packages fix security vulnerabilities:

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).


Updated Packages:
Mageia 1:
dhcp-client-4.2.4-0.P1.1.mga1
dhcp-common-4.2.4-0.P1.1.mga1
dhcp-devel-4.2.4-0.P1.1.mga1
dhcp-doc-4.2.4-0.P1.1.mga1
dhcp-relay-4.2.4-0.P1.1.mga1
dhcp-server-4.2.4-0.P1.1.mga1

Mageia 2:
dhcp-client-4.2.4P1-1.1.mga2
dhcp-common-4.2.4P1-1.1.mga2
dhcp-devel-4.2.4P1-1.1.mga2
dhcp-doc-4.2.4P1-1.1.mga2
dhcp-relay-4.2.4P1-1.1.mga2
dhcp-server-4.2.4P1-1.1.mga2


References:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-3570
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-3571
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-3954
https://kb.isc.org/article/AA-00714
https://kb.isc.org/article/AA-00712
https://kb.isc.org/article/AA-00737
http://www.mandriva.com/en/support/security/advisories/?d...
https://bugs.mageia.org/show_bug.cgi?id=6872
https://wiki.mageia.org/en/Support/Advisories/MGASA-2012-...