Bug 1702642 (CVE-2019-6468) - CVE-2019-6468 bind: named can exit with an assertion failure if nxdomain-redirect is used.
Summary: CVE-2019-6468 bind: named can exit with an assertion failure if nxdomain-redi...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2019-6468
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 1702542
TreeView+ depends on / blocked
 
Reported: 2019-04-24 10:59 UTC by Huzaifa S. Sidhpurwala
Modified: 2021-02-16 22:04 UTC (History)
10 users (show)

Fixed In Version: bind 9.11.5-S6
Clone Of:
Environment:
Last Closed: 2019-04-25 05:24:45 UTC
Embargoed:

Attachments (Terms of Use)

Description Huzaifa S. Sidhpurwala 2019-04-24 10:59:24 UTC 
As per upstream advisory:

In BIND Supported Preview Edition, an error in the nxdomain-redirect feature can occur in versions which support EDNS Client Subnet (ECS) features. In those versions which have ECS support, enabling nxdomain-redirect is likely to lead to BIND exiting due to assertion failure.

If nxdomain-redirect is enabled (via configuration) in a vulnerable BIND release, a malicious party can cause BIND to exit by deliberately triggering the bug.
Comment 1 Huzaifa S. Sidhpurwala 2019-04-24 10:59:29 UTC 
Acknowledgments:

Name: ISC
Comment 2 Huzaifa S. Sidhpurwala 2019-04-24 11:00:47 UTC 
Statement:

This issue only affects the special feature preview branch of bind. Bind packages shipped with Red Hat Enterprise Linux are not affected by this flaw.
Comment 3 Huzaifa S. Sidhpurwala 2019-04-25 05:24:49 UTC 
External References:

https://kb.isc.org/docs/cve-2019-6468
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