CVE-2011-2699
First published: Wed Jul 20 2011(Updated: )
IPv6 fragment identification generation is way beyond what we use for IPv4 : It uses a single generator. Its not scalable and allows DOS attacks. Now inetpeer is IPv6 aware, we can use it to provide a more secure and scalable frag ident generator (per destination, instead of system wide) This patch : 1) defines a new secure_ipv6_id() helper 2) extends inet_getid() to provide 32bit results 3) extends ipv6_select_ident() with a new dest parameter <a href="http://thread.gmane.org/gmane.linux.network/201773">http://thread.gmane.org/gmane.linux.network/201773</a> Acknowledgements: Red Hat would like to thank Fernando Gont for reporting this issue.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <3.1 | |
| Redhat Enterprise Linux | =4.0 | |
| Redhat Enterprise Mrg | =2.0 | |
| debian/linux-2.6 |
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Reference Links
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1
- https://bugzilla.redhat.com/show_bug.cgi?id=723429
- http://www.openwall.com/lists/oss-security/2011/07/20/5
- https://github.com/torvalds/linux/commit/87c48fa3b4630905f98268dde838ee43626a060c
- http://www.securitytracker.com/id?1027274
- http://www.mandriva.com/security/advisories?name=MDVSA-2013:150
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=87c48fa3b4630905f98268dde838ee43626a060c
- https://launchpad.net/bugs/cve/CVE-2011-2699
- http://thread.gmane.org/gmane.linux.network/201773
- https://access.redhat.com/support/policy/updates/errata/
- https://rhn.redhat.com/errata/RHSA-2011-1386.html
- https://rhn.redhat.com/errata/RHSA-2011-1465.html
- http://git.kernel.org/linus/87c48fa3b4630905f98268dde838ee43626a060c
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=723429#c9
- http://permalink.gmane.org/gmane.linux.kernel.stable/16086
- http://git.kernel.org/?p=linux/kernel/git/stable/linux-3.0.y.git;a=commitdiff;h=ef81bb40bf15f350fe865f31fa42f1082772a576
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=748667
- https://rhn.redhat.com/errata/RHSA-2012-0358.html
- https://security-tracker.debian.org/tracker/CVE-2011-2699
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2699
- https://nvd.nist.gov/vuln/detail/CVE-2011-2699
- https://ubuntu.com/security/CVE-2011-2699
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