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Gentoo Linux Security Advisory GLSA 201709-12 |
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https://security.gentoo.org/ |
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Severity: Normal |
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Title: Perl: Race condition vulnerability |
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Date: September 17, 2017 |
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Bugs: #620304 |
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ID: 201709-12 |
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Synopsis |
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======== |
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|
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A vulnerability in module File::Path for Perl allows local attackers to |
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set arbitrary mode values on arbitrary files bypassing security |
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restrictions. |
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|
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Background |
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========== |
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|
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File::Path module provides a convenient way to create directories of |
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arbitrary depth and to delete an entire directory subtree from the |
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filesystem. |
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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 dev-lang/perl < 5.24.1-r2 >= 5.24.1-r2 |
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2 perl-core/File-Path < 2.130.0 >= 2.130.0 |
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3 virtual/perl-File-Path < 2.130.0 >= 2.130.0 |
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------------------------------------------------------------------- |
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3 affected packages |
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|
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Description |
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=========== |
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|
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A race condition occurs within concurrent environments. This condition |
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was discovered by The cPanel Security Team in the rmtree and |
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remove_tree functions in the File-Path module before 2.13 for Perl. |
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This is due to the time-of-check-to-time-of-use (TOCTOU) race |
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condition between the stat() that decides the inode is a directory and |
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the chmod() that tries to make it user-rwx. |
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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 exploit this condition to set arbitrary mode |
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values on arbitrary files and hence bypass security restrictions. |
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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 Perl users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=dev-lang/perl-5.24.1-r2" |
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All File-Path users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=perl-core/File-Path-2.130.0" |
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|
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All Perl-File-Path users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=virtual/perl-File-Path-2.130.0" |
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|
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References |
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========== |
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[ 1 ] CVE-2017-6512 |
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https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-6512 |
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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/201709-12 |
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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 2017 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/2.5 |
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