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Gentoo: 200404-18 High: SSMTP Format String Exploit Risk

There are multiple format string vulnerabilities in the SSMTP package, which may allow an attacker to run arbitrary code with ssmtp's privileges (potentially root). [More...]. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200404-18 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High Title: Multiple Vulnerabilities in ssmtp Date: April 26, 2004 Bugs: #47918, #48435 ID: 200404-18 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======= There are multiple format string vulnerabilities in the SSMTP package, which may allow an attacker to run arbitrary code with ssmtp's privileges (potentially root). Background ========= SSMTP is a very simple mail transfer agent (MTA) that relays mail from the local machine to another SMTP host. It is not designed to function as a full mail server; its sole purpose is to relay mail. Affected packages ================ ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-mail/ssmtp = 2.60.7 Description ========== There are two format string vulnerabilities inside the log_event() and die() functions of ssmtp. Strings from outside ssmtp are passed to various printf()-like functions from within log_event() and die() as format strings. An attacker could cause a specially-crafted string to be passed to these functions, and potentially cause ssmtp to execute arbitrary code. Impact ===== If ssmtp connects to a malicious mail relay server, this vulnerability can be used to execute code with the rights of the mail sender, including root. Workaround ========= There is no known workaround atthis time. All users are advised to upgrade to the latest available version of ssmtp. Resolution ========= All users are advised to upgrade to the latest available version of ssmtp. # emerge sync # emerge -pv "> =net-mail/ssmtp-2.60.7" # emerge "> =net-mail/ssmtp-2.60.7" References ========= [ 1 ] Secunia Advisory https://www.flexera.com/products/security/software-vulnerability-research/secunia-research [ 2 ] CVE Reference https://www.cve.org/CVERecord?id=CAN-2004-0156 [ 3 ] Debian Advisory https://lists.debian.org/debian-security-announce/2004/msg00084.html Availability =========== This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/200404-18 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 This email address is being protected from spambots. You need JavaScript enabled to view it. or alternatively, you may file a bug at https://bugs.gentoo.org/. License ====== Copyright 2004 Gentoo Technologies, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. https://creativecommons.org/licenses/by-sa/1.0/ . A series of formatting vulnerabilities in the SSMTP software could enable malicious users to run arbitrary commands with root access.. SSMTP Security, Gentoo Advisory, Format String Attack. . LinuxSecurity.com Team

Apr 26, 2004 Gentoo