Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2012.0729.2 isc-dhcp security update 6 August 2012 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: isc-dhcp Publisher: Debian Operating System: Debian GNU/Linux 6 Impact/Access: Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2012-3954 CVE-2012-3571 CVE-2011-4539 Reference: ESB-2012.0709 ESB-2011.1227 Original Bulletin: http://www.debian.org/security/2012/dsa-2519 Revision History: August 6 2012: Added regression information August 2 2012: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - - ------------------------------------------------------------------------- Debian Security Advisory DSA-2519-2 security@debian.org http://www.debian.org/security/ Nico Golde August 4, 2012 http://www.debian.org/security/faq - - ------------------------------------------------------------------------- Package : isc-dhcp Vulnerability : several Problem type : remote Debian-specific: no CVE ID : CVE-2011-4539 CVE-2012-3571 CVE-2012-3954 It was discovered that the recent update for isc-dhcp, did not contain the patched code included in the source package. Due to quirk in the build system those patches were deapplied during the build process. For the stable distribution (squeeze), this problem has been fixed in version 4.1.1-P1-15+squeeze6. 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 - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iEYEARECAAYFAlAdAyMACgkQHYflSXNkfP9wCgCcCk6v59916GKjY223a7RNwQOG MZsAn34XoNM9uVGwskuO+Yx3CEya1kvO =+/cw - -----END PGP SIGNATURE----- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - - ------------------------------------------------------------------------- Debian Security Advisory DSA-2519-1 security@debian.org http://www.debian.org/security/ Nico Golde August 1, 2012 http://www.debian.org/security/faq - - ------------------------------------------------------------------------- Package : isc-dhcp Vulnerability : several Problem type : remote Debian-specific: no CVE ID : CVE-2011-4539 CVE-2012-3571 CVE-2012-3954 Several security vulnerabilities affecting ISC dhcpd, a server for automatic IP address assignment, have been discovered. Additionally, the latest security update for isc-dhcp, DSA-2516-1, did not properly apply the patches for CVE-2012-3571 and CVE-2012-3954. This has been addressed in this additional update. CVE-2011-4539 BlueCat Networks discovered that it is possible to crash DHCP servers configured to evaluate requests with regular expressions via crafted DHCP request packets. CVE-2012-3571 Markus Hietava of the Codenomicon CROSS project discovered that it is possible to force the server to enter an infinite loop via messages with malformed client identifiers. CVE-2012-3954 Glen Eustace discovered that DHCP servers running in DHCPv6 mode and possibly DHCPv4 mode suffer of memory leaks while processing messages. An attacker can use this flaw to exhaust resources and perform denial of service attacks. For the stable distribution (squeeze), this problem has been fixed in version 4.1.1-P1-15+squeeze5. For the testing (wheezy) and unstable (sid) distributions, this problem will be fixed soon. 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 - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iEYEARECAAYFAlAZdqMACgkQHYflSXNkfP9JTACgqRtw/5/jPQwJWt1lUnvTDs1H Ha0AoKSoDWGdA4LIXa9UbFVG7/0vdksV =EVNR - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBUB8bFu4yVqjM2NGpAQKt6BAAqOrHwd2gOF+qSwztS1I+kVcrpQ6JQUjY WNKw/QOXIYcbI2fmy/nd/H93x0gQT2CcZg1XgwgdOyK2jXl2as5ekQ732v6nyb+4 koC6Mt+PHbFtDP1eOSA5JXnyFRgTmG6/hYraKaSWWD5+rx+3WXItcreETVnskLhA Oog6Um/W/o5FFmk7hE72dEavRqunlqGePzf7iDE3rMa1woaJIaPNYCS1ROvgqmnL oGEEkyGmxdlWBxX7xRK9/RDgH0obLGB6jogX9eXrN6d+TR/TW6PLfh3nuRkkWY7M y27I06vY96/S2fuv5n9rJQPIq3pQKS5xBAWCpTO9OBTExZUubUTBAl8T5Vc1foox RHbqwtEn4u5UCFEEGFzTxYNq5K941+9DNO2jQoMCeonNOUcBhBxcg7DRS1rpR13Q /vzBKOQ6FDPsqKy8eamBe5u21GONq3mbARMQbHA0FoxKLDixo6APaf873blbWpXp OfsLXTcy0oAT/XxrniiE7/2hstaRBWKMtTY5xVF8hYtlgrbVu4VT1JmQsfIPOwPI ztmn27t5oGvgHefy5xP+5cLr+YK0A4nbEIVmZPAjJZwYvQyoIx/QEns2bPi5DtRX ZKDYKD1PtYxFjx0V6TQIqzGbHpJp9W0AtgXIIf9bnAzTeaudyzquaexr5lvGiz3O u/ghVtxkC/c= =Dy/z -----END PGP SIGNATURE-----