Bug 2216581 (CVE-2023-2829) - CVE-2023-2829 bind: DNSSEC-Validated cache can be remotely terminated with malformed NSEC record
Summary: CVE-2023-2829 bind: DNSSEC-Validated cache can be remotely terminated with ma...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2023-2829
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2216623 2216624 2216625 2216633 2216634 2216635 2216636 2216637 2216638 2216639 2216640 2216641 2217445 2217446 2217447 2217448
Blocks: 2216252
TreeView+ depends on / blocked
 
Reported: 2023-06-21 22:24 UTC by Anten Skrabec
Modified: 2023-06-28 17:41 UTC (History)
4 users (show)

Fixed In Version:
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A vulnerability was found in BIND. This security flaw occurs when a named instance is configured to run as a DNSSEC-validating recursive resolver with the Aggressive Use of DNSSEC-Validated Cache (RFC 8198) option (synth-from-dnssec) enabled; remote termination can occur using a zone with a malformed NSEC record.
Clone Of:
Environment:
Last Closed: 2023-06-28 17:41:01 UTC
Embargoed:

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Description Anten Skrabec 2023-06-21 22:24:55 UTC 
A `named` instance configured to run as a DNSSEC-validating recursive resolver with the Aggressive Use of DNSSEC-Validated Cache (RFC 8198) option (`synth-from-dnssec`) enabled can be remotely terminated using a zone with a malformed NSEC record.
This issue affects BIND 9 versions 9.16.8-S1 through 9.16.41-S1 and 9.18.11-S1 through 9.18.15-S1.

https://kb.isc.org/docs/cve-2023-2829
Comment 1 Sandipan Roy 2023-06-22 05:49:11 UTC 
Created bind tracking bugs for this issue:

Affects: fedora-37 [bug 2216623]
Affects: fedora-38 [bug 2216625]


Created dhcp tracking bugs for this issue:

Affects: fedora-37 [bug 2216624]
Comment 3 Petr Menšík 2023-06-22 14:07:44 UTC 
According to upstream article [1] this is only affecting supported preview version. We do not have it in RHEL or even in Fedora. 
That is also why upstream release notes [2] of latest 9.16 does not mention this vulnerability.
We are not affected by this one. In any release or component. Nor have a change to backport.

Can all those bugs be closed?

1. https://kb.isc.org/docs/cve-2023-2829
2. https://downloads.isc.org/isc/bind9/9.16.42/doc/arm/html/notes.html#security-fixes
Comment 6 Product Security DevOps Team 2023-06-28 17:40:59 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2023-2829
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