[Please upgrade Dnsmasq on all distributions -- Raju] This is an RFC 1153 digest. (1 message) ----------------------------------------------------------------------
MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1445798504==" Message-ID: <[EMAIL PROTECTED]> From: Thierry Carrez <[EMAIL PROTECTED]> Sender: [EMAIL PROTECTED] To: [EMAIL PROTECTED] Cc: full-disclosure@lists.grok.org.uk, bugtraq@securityfocus.com, [EMAIL PROTECTED] Subject: [Full-disclosure] [ GLSA 200504-03 ] Dnsmasq: Poisoning and Denial of Service vulnerabilities Date: Mon, 04 Apr 2005 13:38:37 +0200 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --===============1445798504== Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigD0B79BC929BBE9CF988AEFB3" This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigD0B79BC929BBE9CF988AEFB3 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200504-03 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Low Title: Dnsmasq: Poisoning and Denial of Service vulnerabilities Date: April 04, 2005 Bugs: #86718 ID: 200504-03 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== Dnsmasq is vulnerable to DNS cache poisoning attacks and a potential Denial of Service from the local network. Background ========== Dnsmasq is a lightweight and easily-configurable DNS forwarder and DHCP server. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-dns/dnsmasq < 2.22 >= 2.22 Description =========== Dnsmasq does not properly detect that DNS replies received do not correspond to any DNS query that was sent. Rob Holland of the Gentoo Linux Security Audit team also discovered two off-by-one buffer overflows that could crash DHCP lease files parsing. Impact ====== A remote attacker could send malicious answers to insert arbitrary DNS data into the Dnsmasq cache. These attacks would in turn help an attacker to perform man-in-the-middle and site impersonation attacks. The buffer overflows might allow an attacker on the local network to crash Dnsmasq upon restart. Workaround ========== There is no known workaround at this time. Resolution ========== All Dnsmasq users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-dns/dnsmasq-2.22" References ========== [ 1 ] Dnsmasq Changelog http://www.thekelleys.org.uk/dnsmasq/CHANGELOG Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200504-03.xml Concerns? ========= Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to [EMAIL PROTECTED] or alternatively, you may file a bug at http://bugs.gentoo.org. License ======= Copyright 2005 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. http://creativecommons.org/licenses/by-sa/2.0 --------------enigD0B79BC929BBE9CF988AEFB3 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) iD8DBQFCUSdCvcL1obalX08RAor/AJ0Zb4dyMS+58gaWHIBbGGKlSVhJewCgpyKR cVqhr+9H9AZtNnqfV9ygwek= =lmAU -----END PGP SIGNATURE----- --------------enigD0B79BC929BBE9CF988AEFB3-- --===============1445798504== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/ --===============1445798504==-- ------------------------------ End of this Digest ****************** -- Raj Mathur [EMAIL PROTECTED] http://kandalaya.org/ GPG: 78D4 FC67 367F 40E2 0DD5 0FEF C968 D0EF CC68 D17F It is the mind that moves _______________________________________________ ilugd mailinglist -- ilugd@lists.linux-delhi.org http://frodo.hserus.net/mailman/listinfo/ilugd Archives at: http://news.gmane.org/gmane.user-groups.linux.delhi http://www.mail-archive.com/ilugd@lists.linux-delhi.org/