Stay Secure with the Latest Linux Advisories

security advisorygentooremote code execution

Gentoo: GLSA-200409-15 Normal: Usermin Multiple Risks and Shellcode Attack

A vulnerability in the webmail function of Usermin could be used by an attacker to execute shell code via a specially-crafted e-mail. A bug in the installation script of Webmin and Usermin also allows a local user to execute a symlink attack at installation time. [More...]. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200409-15 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: Webmin, Usermin: Multiple vulnerabilities in Usermin Date: September 12, 2004 Bugs: #63167 ID: 200409-15 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======= A vulnerability in the webmail function of Usermin could be used by an attacker to execute shell code via a specially-crafted e-mail. A bug in the installation script of Webmin and Usermin also allows a local user to execute a symlink attack at installation time. Background ========= Webmin and Usermin are web-based system administration consoles. Webmin allows an administrator to easily configure servers and other features. Usermin allows users to configure their own accounts, execute commands, and read e-mail. The Usermin functionality, including webmail, is also included in Webmin. Affected packages ================ ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-admin/usermin < 1.090 > = 1.090 2 app-admin/webmin < 1.160 > = 1.160 ------------------------------------------------------------------- 2 affected packages on all of theirsupported architectures. ------------------------------------------------------------------- Description ========== There is an input validation bug in the webmail feature of Usermin. Additionally, the Webmin and Usermin installation scripts write to /tmp/.webmin without properly checking if it exists first. Impact ===== The first vulnerability allows a remote attacker to inject arbitrary shell code in a specially-crafted e-mail. This could lead to remote code execution with the privileges of the user running Webmin or Usermin. The second could allow local users who know Webmin or Usermin is going to be installed to have arbitrary files be overwritten by creating a symlink by the name /tmp/.webmin that points to some target file, e.g. /etc/passwd. Workaround ========= There is no known workaround at this time. Resolution ========= All Usermin users should upgrade to the latest version: # emerge sync # emerge -pv "> =app-admin/usermin-1.090" # emerge "> =app-admin/usermin-1.090" All Webmin users should upgrade to the latest version: # emerge sync # emerge -pv "> =app-admin/webmin-1.160" # emerge "> =app-admin/webmin-1.160" References ========= [ 1 ] Secunia Advisory SA12488 https://www.flexera.com/products/security/software-vulnerability-research/secunia-research [ 2 ] Usermin Changelog https://webmin.com/tags/usermin-changelog/ Availability =========== This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/200409-15 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 Foundation, 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/ -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) Comment: Using GnuPG with Thunderbird - iQEVAwUBQUSoAbDO2aFJ9pv2AQIrDggAuEDR9uz2KNl/7Z0a+kn/wZ0eaf4/gmsS RG6539CXmk9m4HIyz204duru9Qp8LTAhBabOvf4VyofWNtKEhF+Ide5w++4rBkKE mEeD4fCOEr4TUMjVx8qSXjbGSSzGYCREB2PwnHm+G8k3RFaqgtEPmusBr0Kh0WWh UwKGGIuHU5m8LuT1kq7frGDy7zZzbPtOPqp3vkSDsaIQhJckk6cIUlo/qezwrBtg t9oZ8qm1cILR0n+y9IxbBVdZLRwhHoLpBrBI/spJOT2+J7Szl/RRyn78eFtAqjVx G9Ng8RO36Q/JBMdrzNx/zwTEsLTRNi1nkpMFrOMyBNzjTIhZBlZ+Bg==wprj -----END PGP SIGNATURE----- . The recent advisory highlights various vulnerabilities in Usermin and Webmin, emphasizing the potential for shellcode execution through specially crafted emails.. Usermin Software, Webmin Threat, Gentoo Security Risks. . LinuxSecurity.com Team

Sep 12, 2004 Gentoo