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Gentoo Linux Security Advisory GLSA 200409-18 |
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http://security.gentoo.org/ |
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Severity: High |
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Title: cdrtools: Local root vulnerability in cdrecord if set SUID |
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root |
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Date: September 14, 2004 |
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Bugs: #63187 |
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ID: 200409-18 |
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Synopsis |
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======== |
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|
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cdrecord, if manually set SUID root, is vulnerable to a local root |
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exploit allowing users to escalate privileges. |
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|
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Background |
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========== |
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|
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The cdrtools package is a set of tools for CD recording, including the |
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popular cdrecord command-line utility. |
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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 app-cdr/cdrtools <= 2.01_alpha37 >= 2.01_alpha37-r1 |
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*>= 2.01_alpha28-r2 |
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|
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Description |
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=========== |
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|
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Max Vozeler discovered that the cdrecord utility, when set to SUID |
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root, fails to drop root privileges before executing a user-supplied |
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RSH program. By default, Gentoo does not ship the cdrecord utility as |
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SUID root and therefore is not vulnerable. However, many users (and |
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CD-burning front-ends) set this manually after installation. |
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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 specify a malicious program using the $RSH |
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environment variable and have it executed by the SUID cdrecord, |
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resulting in root privileges escalation. |
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|
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Workaround |
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========== |
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As a workaround, you could remove the SUID rights from your cdrecord |
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utility : |
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# chmod a-s /usr/bin/cdrecord |
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Resolution |
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========== |
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All cdrtools users should upgrade to the latest version: |
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# emerge sync |
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# emerge -pv ">=app-cdr/cdrtools-2.01_alpha37-r1" |
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# emerge ">=app-cdr/cdrtools-2.01_alpha37-r1" |
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|
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References |
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========== |
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|
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[ 1 ] CAN-2004-0806 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0806 |
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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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http://security.gentoo.org/glsa/glsa-200409-18.xml |
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|
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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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|
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Copyright 2004 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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|
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http://creativecommons.org/licenses/by-sa/1.0 |
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