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Gentoo Linux Security Advisory GLSA 200707-04 |
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http://security.gentoo.org/ |
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|
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Severity: Normal |
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Title: GNU C Library: Integer overflow |
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Date: July 03, 2007 |
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Bugs: #183844 |
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ID: 200707-04 |
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|
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Synopsis |
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======== |
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|
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An integer overflow in the dynamic loader, ld.so, could result in the |
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execution of arbitrary code with escalated privileges. |
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|
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Background |
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========== |
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|
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The GNU C library is the standard C library used by Gentoo Linux |
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systems. It provides programs with basic facilities and interfaces to |
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system calls. ld.so is the dynamic linker which prepares dynamically |
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linked programs for execution by resolving runtime dependencies and |
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related functions. |
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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 sys-libs/glibc < 2.5-r4 >= 2.5-r4 |
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------------------------------------------------------------------- |
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# Package 1 only applies to x86 users. |
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|
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Description |
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=========== |
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|
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Tavis Ormandy of the Gentoo Linux Security Team discovered a flaw in |
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the handling of the hardware capabilities mask by the dynamic loader. |
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If a mask is specified with a high population count, an integer |
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overflow could occur when allocating memory. |
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|
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Impact |
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====== |
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|
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As the hardware capabilities mask is honored by the dynamic loader |
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during the execution of suid and sgid programs, in theory this |
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vulnerability could result in the execution of arbitrary code with root |
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privileges. This update is provided as a precaution against currently |
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unknown attack vectors. |
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|
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Workaround |
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========== |
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|
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There is no known workaround at this time. |
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|
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Resolution |
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========== |
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All users should upgrade to the latest version: |
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|
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=sys-libs/glibc-2.5-r4" |
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|
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References |
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========== |
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|
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[ 1 ] CVE-2007-3508 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3508 |
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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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|
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http://security.gentoo.org/glsa/glsa-200707-04.xml |
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|
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Concerns? |
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========= |
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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 2007 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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|
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http://creativecommons.org/licenses/by-sa/2.5 |