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Gentoo Linux Security Advisory GLSA 200410-19 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: glibc: Insecure tempfile handling in catchsegv script |
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Date: October 21, 2004 |
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Bugs: #66358 |
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ID: 200410-19 |
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Synopsis |
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======== |
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|
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The catchsegv script in the glibc package is vulnerable to symlink |
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attacks, potentially allowing a local user to overwrite arbitrary |
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files with the rights of the user running the script. |
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|
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Background |
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========== |
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glibc is a package that contains the GNU C library. |
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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-libs/glibc <= 2.3.4.20040808 *>= 2.2.5-r9 |
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*>= 2.3.2-r12 |
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*>= 2.3.3.20040420-r2 |
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*>= 2.3.4.20040619-r2 |
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>= 2.3.4.20040808-r1 |
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Description |
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=========== |
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|
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The catchsegv script creates temporary files in world-writeable |
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directories with predictable names. |
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Impact |
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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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catchsegv script is called, this would result in the file being |
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overwritten with the rights of the user running the utility, which |
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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 glibc users should upgrade to the latest version: |
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# emerge sync |
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# emerge -pv sys-libs/glibc |
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# emerge sys-libs/glibc |
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References |
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========== |
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[ 1 ] CAN-2004-0968 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0968 |
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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-200410-19.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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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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