nf_conntrack in netfilter in the Linux kernel before 2.6.20.3 does not set nfctinfo during reassembly of fragmented packets, which leaves the default value as IP_CT_ESTABLISHED and might allow remote attackers to bypass certain rulesets using IPv6 fragments.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Linux_kernel | Linux | * | 2.6.20.2 (including) |
| Red Hat Enterprise Linux 5 | RedHat | kernel-0:2.6.18-8.1.4.el5 | * |
| Linux-source-2.6.15 | Ubuntu | dapper | * |
| Linux-source-2.6.17 | Ubuntu | edgy | * |
References
- http://secunia.com/advisories/24492
- http://secunia.com/advisories/25228
- http://secunia.com/advisories/25288
- http://secunia.com/advisories/25392
- http://secunia.com/advisories/25961
- http://secunia.com/advisories/26620
- http://www.debian.org/security/2007/dsa-1289
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.20.3
- http://www.mandriva.com/security/advisories?name=MDKSA-2007:171
- http://www.mandriva.com/security/advisories?name=MDKSA-2007:196
- http://www.novell.com/linux/security/advisories/2007_43_kernel.html
- http://www.osvdb.org/33028
- http://www.redhat.com/support/errata/RHSA-2007-0347.html
- http://www.securityfocus.com/bid/23976
- http://www.ubuntu.com/usn/usn-464-1
- http://www.vupen.com/english/advisories/2007/0944
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10457
- http://secunia.com/advisories/24492
- http://secunia.com/advisories/25228
- http://secunia.com/advisories/25288
- http://secunia.com/advisories/25392
- http://secunia.com/advisories/25961
- http://secunia.com/advisories/26620
- http://www.debian.org/security/2007/dsa-1289
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.20.3
- http://www.mandriva.com/security/advisories?name=MDKSA-2007:171
- http://www.mandriva.com/security/advisories?name=MDKSA-2007:196
- http://www.novell.com/linux/security/advisories/2007_43_kernel.html
- http://www.osvdb.org/33028
- http://www.redhat.com/support/errata/RHSA-2007-0347.html
- http://www.securityfocus.com/bid/23976
- http://www.ubuntu.com/usn/usn-464-1
- http://www.vupen.com/english/advisories/2007/0944
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10457