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Gentoo Linux Security Advisory GLSA 200611-05 |
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http://security.gentoo.org/ |
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Severity: High |
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Title: Netkit FTP Server: Privilege escalation |
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Date: November 10, 2006 |
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Bugs: #150292 |
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ID: 200611-05 |
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Synopsis |
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======== |
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|
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An incorrect seteuid() call could allow an FTP user to access some |
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files or directories that would normally be inaccessible. |
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Background |
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========== |
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|
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net-ftp/ftpd is the Linux Netkit FTP server with optional SSL support. |
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 net-ftp/ftpd < 0.17-r4 >= 0.17-r4 |
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Description |
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=========== |
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|
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Paul Szabo reported that an incorrect seteuid() call after the chdir() |
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function can allow an attacker to access a normally forbidden |
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directory, in some very particular circumstances, for example when the |
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NFS-hosted targetted directory is not reachable by the client-side root |
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user. Additionally, some potentially exploitable unchecked setuid() |
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calls were also fixed. |
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|
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Impact |
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====== |
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|
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A local attacker might craft his home directory to gain access through |
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ftpd to normally forbidden directories like /root, possibly with |
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writing permissions if seteuid() fails and if the ftpd configuration |
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allows that. The unchecked setuid() calls could also lead to a root FTP |
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login, depending on the FTP server configuration. |
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|
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Workaround |
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========== |
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There is no known workaround at this time. |
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Resolution |
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========== |
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All Netkit FTP Server users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=net-ftp/ftpd-0.17-r4" |
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References |
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========== |
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[ 1 ] CVE-2006-5778 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5778 |
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Availability |
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============ |
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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http://security.gentoo.org/glsa/glsa-200611-05.xml |
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Concerns? |
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========= |
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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http://bugs.gentoo.org. |
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|
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License |
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======= |
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Copyright 2006 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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http://creativecommons.org/licenses/by-sa/2.5 |
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