From koon@gentoo.org Fri May 27 07:41:16 2005 From: Thierry Carrez To: gentoo-announce@lists.gentoo.org Cc: full-disclosure@lists.grok.org.uk, bugtraq@securityfocus.com, security-alerts@linuxsecurity.com Date: Fri, 27 May 2005 13:31:30 +0200 Subject: [Full-disclosure] [ GLSA 200505-20 ] Mailutils: Multiple vulnerabilities in imap4d and mail - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200505-20 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High Title: Mailutils: Multiple vulnerabilities in imap4d and mail Date: May 27, 2005 Bugs: #94053 ID: 200505-20 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== The imap4d server and the mail utility from GNU Mailutils contain multiple vulnerabilities, potentially allowing a remote attacker to execute arbitrary code with root privileges. Background ========== GNU Mailutils is a collection of mail-related utilities, including an IMAP4 server (imap4d) and a Mail User Agent (mail). Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-mail/mailutils < 0.6-r1 >= 0.6-r1 Description =========== infamous41d discovered several vulnerabilities in GNU Mailutils. imap4d does not correctly implement formatted printing of command tags (CAN-2005-1523), fails to validate the range sequence of the "FETCH" command (CAN-2005-1522), and contains an integer overflow in the "fetch_io" routine (CAN-2005-1521). mail contains a buffer overflow in "header_get_field_name()" (CAN-2005-1520). Impact ====== A remote attacker can exploit the format string and integer overflow in imap4d to execute arbitrary code as the imap4d user, which is usually root. By sending a specially crafted email message, a remote attacker could exploit the buffer overflow in the "mail" utility to execute arbitrary code with the rights of the user running mail. Finally, a remote attacker can also trigger a Denial of Service by sending a malicious FETCH command to an affected imap4d, causing excessive resource consumption. Workaround ========== There are no known workarounds at this time. Resolution ========== All GNU Mailutils users should upgrade to the latest available version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-mail/mailutils-0.6-r1" References ========== [ 1 ] CAN-2005-1520 http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1520 [ 2 ] CAN-2005-1521 http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1521 [ 3 ] CAN-2005-1522 http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1522 [ 4 ] CAN-2005-1523 http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1523 [ 5 ] iDEFENSE 05.25.05 advisories http://www.idefense.com/application/poi/display?type=vulnerabilities&showYear=2005 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200505-20.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 security@gentoo.org 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 [ Part 1.2, "OpenPGP digital signature" Application/PGP-SIGNATURE ] [ 196bytes. ] [ Unable to print this part. ] [ Part 2: "Attached Text" ] _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/