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[Full-disclosure] [ GLSA 200611-05 ] Netkit FTP Server: Privilege escalation

Description

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200611-05 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High Title: Netkit FTP Server: Privilege escalation Date: November 10, 2006 Bugs: #150292 ID: 200611-05 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== An incorrect seteuid() call could allow an FTP user to access some files or directories that would normally be inaccessible. Background ========== net-ftp/ftpd is the Linux Netkit FTP server with optional SSL support. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-ftp/ftpd < 0.17-r4 >= 0.17-r4 Description =========== Paul Szabo reported that an incorrect seteuid() call after the chdir() function can allow an attacker to access a normally forbidden directory, in some very particular circumstances, for example when the NFS-hosted targetted directory is not reachable by the client-side root user. Additionally, some potentially exploitable unchecked setuid() calls were also fixed. Impact ====== A local attacker might craft his home directory to gain access through ftpd to normally forbidden directories like /root, possibly with writing permissions if seteuid() fails and if the ftpd configuration allows that. The unchecked setuid() calls could also lead to a root FTP login, depending on the FTP server configuration. Workaround ========== There is no known workaround at this time. Resolution ========== All Netkit FTP Server users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-ftp/ftpd-0.17-r4" References ========== [ 1 ] CVE-2006-5778 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5778 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200611-05.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 2006 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/2.5


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