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Gentoo Linux Security Advisory GLSA 200407-07 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: Shorewall : Insecure temp file handling |
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Date: July 08, 2004 |
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Bugs: #55675 |
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ID: 200407-07 |
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Synopsis |
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======== |
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|
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Shorewall contains a bug in the code handling the creation of temporary |
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files and directories. This can allow a non-root user to overwrite |
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arbitrary system files. |
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|
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Background |
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========== |
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|
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Shorewall is a high level tool for configuring Netfilter, the firewall |
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facility included in the Linux Kernel. |
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|
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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-firewall/shorewall <= 1.4.10c >= 1.4.10f |
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|
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Description |
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=========== |
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|
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Shorewall uses temporary files and directories in an insecure manner. A |
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local user could create symbolic links at specific locations, |
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eventually overwriting other files on the filesystem with the rights of |
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the shorewall process. |
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|
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Impact |
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====== |
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|
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An attacker could exploit this vulnerability to overwrite arbitrary |
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system files with root privileges, resulting in Denial of Service or |
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further exploitation. |
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|
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Workaround |
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========== |
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|
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There is no known workaround at this time. All users should upgrade to |
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the latest available version of Shorewall. |
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|
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Resolution |
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========== |
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|
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All users should upgrade to the latest available version of Shorewall, |
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as follows: |
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# emerge sync |
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|
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# emerge -pv ">=net-firewall/shorewall-1.4.10f" |
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# emerge ">=net-firewall/shorewall-1.4.10f" |
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|
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References |
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========== |
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|
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[ 1 ] Shorewall Announcement |
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|
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http://lists.shorewall.net/pipermail/shorewall-announce/2004-June/000385.html |
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|
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Availability |
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============ |
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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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|
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http://security.gentoo.org/glsa/glsa-200407-07.xml |
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|
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Concerns? |
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========= |
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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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|
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Copyright 2004 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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|
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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/1.0 |
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