CVE-2011-2534: Buffer Overflow
First published: Thu Mar 10 2011(Updated: )
'buffer' string is copied from userspace. It is not checked whether it is zero terminated. This may lead to overflow inside of simple_strtoul(). Changli Gao suggested to copy not more than user supplied 'size' bytes. It was introduced before the git epoch. Files "ipt_CLUSTERIP/*" are root writable only by default, however, on some setups permissions might be relaxed to e.g. network admin user. <a href="http://marc.info/?l=netfilter-devel&m=130036157327564&w=2">http://marc.info/?l=netfilter-devel&m=130036157327564&w=2</a> Proposed patch: <a href="http://git.kernel.org/?p=linux/kernel/git/kaber/nf-2.6.git;a=commitdiff;h=961ed183a9fd080cf306c659b8736007e44065a5">http://git.kernel.org/?p=linux/kernel/git/kaber/nf-2.6.git;a=commitdiff;h=961ed183a9fd080cf306c659b8736007e44065a5</a> Acknowledgements: Red Hat would like to thank Vasiliy Kulikov of Openwall for reporting this issue.
Credit: cve@mitre.org cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <2.6.39 | |
| debian/linux-2.6 |
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Reference Links
- http://marc.info/?l=netfilter&m=129978077509888&w=2
- http://www.openwall.com/lists/oss-security/2011/03/21/1
- https://bugzilla.redhat.com/show_bug.cgi?id=689337
- http://www.openwall.com/lists/oss-security/2011/03/21/4
- http://www.openwall.com/lists/oss-security/2011/03/18/15
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.39
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=961ed183a9fd080cf306c659b8736007e44065a5
- http://marc.info/?l=netfilter-devel&m=130036157327564&w=2
- http://www.securityfocus.com/bid/46921
- http://securityreason.com/securityalert/8284
- https://www.cve.org/CVERecord?id=CVE-2011-2534 https://nvd.nist.gov/vuln/detail/CVE-2011-2534
- https://access.redhat.com/security/cve/CVE-2011-2534
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=961ed183a9fd080cf306c659b8736007e44065a5
- http://marc.info/?l=netfilter-devel&m=130036157327564&w=2
- http://marc.info/?l=netfilter&m=129978077509888&w=2
- https://launchpad.net/bugs/cve/CVE-2011-2534
- http://git.kernel.org/?p=linux/kernel/git/kaber/nf-2.6.git;a=commitdiff;h=961ed183a9fd080cf306c659b8736007e44065a5
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=961ed183a9fd080cf306c659b8736007e44065a5
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=689337#c4
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2534
- http://rhn.redhat.com/errata/RHSA-2011-0833.html
- http://rhn.redhat.com/errata/RHSA-2011-0498.html
- http://rhn.redhat.com/errata/RHSA-2011-0500.html
- https://security-tracker.debian.org/tracker/CVE-2011-2534
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2534
- https://nvd.nist.gov/vuln/detail/CVE-2011-2534
- https://ubuntu.com/security/CVE-2011-2534
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