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Gentoo Linux Security Advisory GLSA 202210-26 |
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https://security.gentoo.org/ |
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Severity: Normal |
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Title: Shadow: TOCTOU Race |
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Date: October 31, 2022 |
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Bugs: #830486 |
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ID: 202210-26 |
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Synopsis |
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======== |
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|
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A TOCTOU race has been discovered in Shadow, which could result in the |
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unauthorized modification of files. |
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Background |
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========== |
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|
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Shadow contains utilities to deal with user accounts |
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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/shadow < 4.12.2 >= 4.12.2 |
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Description |
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=========== |
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|
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A TOCTOU race condition was discovered in shadow. A local attacker with |
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write privileges in a directory removed or copied by usermod/userdel |
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could potentially exploit this flaw when the administrator invokes |
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usermod/userdel. |
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Impact |
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====== |
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|
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An unauthorized user could potentially modify files which they do not |
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have write permissions for. |
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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 Shadow users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=sys-apps/shadow-4.12.2" |
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References |
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========== |
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[ 1 ] CVE-2013-4235 |
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https://nvd.nist.gov/vuln/detail/CVE-2013-4235 |
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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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https://security.gentoo.org/glsa/202210-26 |
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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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https://bugs.gentoo.org. |
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|
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License |
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======= |
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Copyright 2022 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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https://creativecommons.org/licenses/by-sa/2.5 |
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