|Summary:||CVE-2010-0097 BIND DNSSEC NSEC/NSEC3 validation code could cause bogus NXDOMAIN responses|
|Product:||[Other] Security Response||Reporter:||Josh Bressers <bressers>|
|Component:||vulnerability||Assignee:||Red Hat Product Security <security-response-team>|
|Status:||CLOSED ERRATA||QA Contact:|
|Version:||unspecified||CC:||jlieskov, kchoi, kreilly, ovasik, security-response-team|
|Fixed In Version:||Doc Type:||Bug Fix|
|Doc Text:||Story Points:||---|
|Last Closed:||2013-05-02 09:34:42 UTC||Type:||---|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
|Cloudforms Team:||---||Target Upstream Version:|
|Bug Depends On:||555117, 555118, 555119|
Description Josh Bressers 2010-01-12 19:56:05 UTC
We received the following advisory from ISC: Description: There was an error in the DNSSEC NSEC/NSEC3 validation code that could cause bogus NXDOMAIN responses (that is, NXDOMAIN responses for records proven by NSEC or NSEC3 to exist) to be cached as if they had validated correctly, so that future queries to the resolver would return the bogus NXDOMAIN with the AD flag set. Impact: This problem affects all DNSSEC-validating resolvers. It would be difficult to exploit due to other existing protections against cache poisoning (including transaction ID and source port randomization), but it could impair the ability of DNSSEC to protect against a denial-of-service attack on a secure zone. Workarounds: None, administrators need to upgrade to one of the versions detailed below. Active exploits: None known at this time. Solution: Upgrade BIND to one of the following: 9.4.3-P5, 9.5.2-P2 or 9.6.1-P3. There are no fixes available for BIND versions 9.0 through 9.3, as those releases are at End of Life. Note for BIND 9.7 beta-testers: pre-releases of 9.7.0 are vulnerable. Upcoming releases will include these patches.
Comment 4 Adam Tkac 2010-01-18 15:38:35 UTC
Created attachment 385125 [details] Patch for CVE-2010-0097 This patch fixes CVE-2010-0097 (NSEC/NSEC3 validation code could cause bogus NXDOMAIN responses).
Comment 5 Adam Tkac 2010-01-18 15:40:37 UTC
Created attachment 385126 [details] Improved fix for CVE-2009-4022 Improved fix for CVE-2009-4022. This patch obsoletes original fix for CVE-2009-4022.
Comment 9 Josh Bressers 2010-01-19 21:18:01 UTC
This is now public: https://www.isc.org/advisories/CVE-2010-0097
Comment 10 errata-xmlrpc 2010-01-20 15:16:47 UTC
This issue has been addressed in following products: Red Hat Enterprise Linux 5 Via RHSA-2010:0062 https://rhn.redhat.com/errata/RHSA-2010-0062.html
Comment 11 Fedora Update System 2010-01-21 00:13:20 UTC
bind-9.6.1-9.P3.fc11 has been pushed to the Fedora 11 stable repository. If problems still persist, please make note of it in this bug report.
Comment 12 Fedora Update System 2010-01-21 00:14:40 UTC
bind-9.6.1-15.P3.fc12 has been pushed to the Fedora 12 stable repository. If problems still persist, please make note of it in this bug report.