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Gentoo Linux Security Advisory GLSA 200410-07 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: ed: Insecure temporary file handling |
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Date: October 09, 2004 |
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Bugs: #66400 |
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ID: 200410-07 |
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Synopsis |
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======== |
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|
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The ed utility is vulnerable to symlink attacks, potentially allowing a |
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local user to overwrite or change rights on arbitrary files with the |
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rights of the user running ed, which could be the root user. |
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|
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Background |
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========== |
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|
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ed is a line-oriented text editor, used to create or modify text files, |
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both interactively and via shell scripts. |
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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 sys-apps/ed <= 0.2-r3 >= 0.2-r4 |
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Description |
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=========== |
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|
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ed insecurely creates temporary files in world-writeable directories |
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with predictable names. Given that ed is used in various system shell |
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scripts, they are by extension affected by the same vulnerability. |
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|
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Impact |
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====== |
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|
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A local attacker could create symbolic links in the temporary files |
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directory, pointing to a valid file somewhere on the filesystem. When |
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ed is called, this would result in file access with the rights of the |
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user running the utility, which could be the root user. |
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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 ed users should upgrade to the latest version: |
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# emerge sync |
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# emerge -pv ">=sys-apps/ed-0.2-r4" |
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# emerge ">=sys-apps/ed-0.2-r4" |
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References |
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========== |
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[ 1 ] CVE-2000-1137 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2000-1137 |
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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-200410-07.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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License |
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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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