CVE-2011-1095
First published: Fri Aug 20 2010(Updated: )
Harald van Dijk discovered [1],[2] that glibc's locale command does not sufficiently sanitize the user environment. According to POSIX specifications [3], the output of the 'locale' command must be appropriately quoted and safe to execute, in order to restore the locale after temporarily forcing a change (such as LC_ALL=C). However, this is not the case with glibc versions up to and including 2.12.1: LANG=' rm -rf /' locale locale: Cannot set LC_CTYPE to default locale: No such file or directory locale: Cannot set LC_MESSAGES to default locale: No such file or directory locale: Cannot set LC_ALL to default locale: No such file or directory LANG= rm -rf / LC_CTYPE=" rm -rf /" LC_NUMERIC=" rm -rf /" LC_TIME=" rm -rf /" LC_COLLATE=" rm -rf /" LC_MONETARY=" rm -rf /" LC_MESSAGES=" rm -rf /" LC_PAPER=" rm -rf /" LC_NAME=" rm -rf /" LC_ADDRESS=" rm -rf /" LC_TELEPHONE=" rm -rf /" LC_MEASUREMENT=" rm -rf /" LC_IDENTIFICATION=" rm -rf /" LC_ALL= Any script that does "eval $(locale)" or something similar will execute the unquoted commands. The POSIX specification states: "The <value> and <implied value> shown above shall be properly quoted for possible later reentry to the shell. The <value> shall not be quoted using double-quotes (so that it can be distinguished by the user from the <implied value> case, which always requires double-quotes)." This has been corrected upstream [4]. [1] <a href="http://bugs.gentoo.org/show_bug.cgi?id=330923">http://bugs.gentoo.org/show_bug.cgi?id=330923</a> [2] <a href="http://sources.redhat.com/bugzilla/show_bug.cgi?id=11904">http://sources.redhat.com/bugzilla/show_bug.cgi?id=11904</a> [3] <a href="http://www.opengroup.org/onlinepubs/000095399/utilities/locale.html">http://www.opengroup.org/onlinepubs/000095399/utilities/locale.html</a> [4] <a href="http://sourceware.org/git/?p=glibc.git;a=patch;h=026373745eab50a683536d950cb7e17dc98c4259">http://sourceware.org/git/?p=glibc.git;a=patch;h=026373745eab50a683536d950cb7e17dc98c4259</a>
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| GNU glibc | =2.2.2 | |
| GNU glibc | =2.9 | |
| GNU glibc | =2.7 | |
| GNU glibc | =2.1.2 | |
| GNU glibc | =2.11 | |
| GNU glibc | =2.0.5 | |
| GNU glibc | =2.2.5 | |
| GNU glibc | =2.0.6 | |
| GNU glibc | =2.10.1 | |
| GNU glibc | =1.00 | |
| GNU glibc | =1.06 | |
| GNU glibc | =2.1.1 | |
| GNU glibc | =1.02 | |
| GNU glibc | =2.0.3 | |
| GNU glibc | =1.07 | |
| GNU glibc | =2.3.1 | |
| GNU glibc | =2.3 | |
| GNU glibc | =2.12.0 | |
| GNU glibc | =2.0 | |
| GNU glibc | =2.1.1.6 | |
| GNU glibc | =1.04 | |
| GNU glibc | =1.01 | |
| GNU glibc | =2.3.10 | |
| GNU glibc | =2.4 | |
| GNU glibc | =2.1 | |
| GNU glibc | =2.3.4 | |
| GNU glibc | =1.09.1 | |
| GNU glibc | =2.1.9 | |
| GNU glibc | =2.3.3 | |
| GNU glibc | =2.12.1 | |
| GNU glibc | =2.6.1 | |
| GNU glibc | =2.0.1 | |
| GNU glibc | =1.09 | |
| GNU glibc | =2.10 | |
| GNU glibc | =2.11.2 | |
| GNU glibc | =2.5.1 | |
| GNU glibc | =2.6 | |
| GNU glibc | =2.0.4 | |
| GNU glibc | =2.0.2 | |
| GNU glibc | =2.2.1 | |
| GNU glibc | =2.3.2 | |
| GNU glibc | =1.03 | |
| GNU glibc | =2.1.3.10 | |
| GNU glibc | =2.3.6 | |
| GNU glibc | <=2.12.2 | |
| GNU glibc | =2.2.3 | |
| GNU glibc | =2.5 | |
| GNU glibc | =2.11.3 | |
| GNU glibc | =1.08 | |
| GNU glibc | =2.3.5 | |
| GNU glibc | =2.8 | |
| GNU glibc | =2.11.1 | |
| GNU glibc | =2.2.4 | |
| GNU glibc | =2.1.3 | |
| GNU glibc | =1.05 | |
| GNU glibc | =2.2 | |
| GNU glibc | =2.10.2 |
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Reference Links
- http://bugs.gentoo.org/show_bug.cgi?id=330923
- http://secunia.com/advisories/43976
- http://www.redhat.com/support/errata/RHSA-2011-0413.html
- https://bugzilla.redhat.com/show_bug.cgi?id=625893
- http://openwall.com/lists/oss-security/2011/03/08/8
- http://www.vupen.com/english/advisories/2011/0863
- http://security.gentoo.org/glsa/glsa-201011-01.xml
- http://sources.redhat.com/bugzilla/show_bug.cgi?id=11904
- http://sourceware.org/bugzilla/show_bug.cgi?id=11904
- http://secunia.com/advisories/43989
- http://openwall.com/lists/oss-security/2011/03/08/21
- http://secunia.com/advisories/43830
- http://openwall.com/lists/oss-security/2011/03/08/22
- http://www.redhat.com/support/errata/RHSA-2011-0412.html
- http://securitytracker.com/id?1025286
- http://secunia.com/advisories/46397
- http://www.vmware.com/security/advisories/VMSA-2011-0012.html
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:178
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12272
- http://www.securityfocus.com/archive/1/520102/100/0/threaded
- http://sourceware.org/git/?p=glibc.git%3Ba=patch%3Bh=026373745eab50a683536d950cb7e17dc98c4259
- http://www.opengroup.org/onlinepubs/000095399/utilities/locale.html
- http://sourceware.org/git/?p=glibc.git;a=patch;h=026373745eab50a683536d950cb7e17dc98c4259
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=625893#c1
- http://www.gentoo.org/security/en/glsa/glsa-201011-01.xml
- https://rhn.redhat.com/errata/RHSA-2011-0412.html
- https://rhn.redhat.com/errata/RHSA-2011-0413.html
- https://rhn.redhat.com/errata/RHSA-2012-0125.html
- collector/nvd-historical
- collector/nvd-index
- agent/severity
- agent/references
- agent/weakness
- agent/author
- agent/description
- agent/type
- agent/event
- agent/first-publish-date
- agent/softwarecombine
- agent/last-modified-date
- agent/remedy
- agent/tags
- collector/mitre-cve
- source/MITRE
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2011-1095
- vendor/gnu
- canonical/gnu glibc
- version/gnu glibc/2.2.2
- version/gnu glibc/2.9
- version/gnu glibc/2.7
- version/gnu glibc/2.1.2
- version/gnu glibc/2.11
- version/gnu glibc/2.0.5
- version/gnu glibc/2.2.5
- version/gnu glibc/2.0.6
- version/gnu glibc/2.10.1
- version/gnu glibc/1.00
- version/gnu glibc/1.06
- version/gnu glibc/2.1.1
- version/gnu glibc/1.02
- version/gnu glibc/2.0.3
- version/gnu glibc/1.07
- version/gnu glibc/2.3.1
- version/gnu glibc/2.3
- version/gnu glibc/2.12.0
- version/gnu glibc/2.0
- version/gnu glibc/2.1.1.6
- version/gnu glibc/1.04
- version/gnu glibc/1.01
- version/gnu glibc/2.3.10
- version/gnu glibc/2.4
- version/gnu glibc/2.1
- version/gnu glibc/2.3.4
- version/gnu glibc/1.09.1
- version/gnu glibc/2.1.9
- version/gnu glibc/2.3.3
- version/gnu glibc/2.12.1
- version/gnu glibc/2.6.1
- version/gnu glibc/2.0.1
- version/gnu glibc/1.09
- version/gnu glibc/2.10
- version/gnu glibc/2.11.2
- version/gnu glibc/2.5.1
- version/gnu glibc/2.6
- version/gnu glibc/2.0.4
- version/gnu glibc/2.0.2
- version/gnu glibc/2.2.1
- version/gnu glibc/2.3.2
- version/gnu glibc/1.03
- version/gnu glibc/2.1.3.10
- version/gnu glibc/2.3.6
- version/gnu glibc/2.12.2
- version/gnu glibc/2.2.3
- version/gnu glibc/2.5
- version/gnu glibc/2.11.3
- version/gnu glibc/1.08
- version/gnu glibc/2.3.5
- version/gnu glibc/2.8
- version/gnu glibc/2.11.1
- version/gnu glibc/2.2.4
- version/gnu glibc/2.1.3
- version/gnu glibc/1.05
- version/gnu glibc/2.2
- version/gnu glibc/2.10.2