Bug 2263917 (CVE-2023-50868) - CVE-2023-50868 bind9: Preparing an NSEC3 closest encloser proof can exhaust CPU resources
Summary: CVE-2023-50868 bind9: Preparing an NSEC3 closest encloser proof can exhaust C...
Keywords:
Status: NEW
Alias: CVE-2023-50868
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2264068 2264101 2264102 2264364
Blocks: 2263895
TreeView+ depends on / blocked
 
Reported: 2024-02-12 19:22 UTC by Marco Benatto
Modified: 2024-05-22 11:41 UTC (History)
10 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in bind9. By flooding a DNSSEC resolver with responses coming from a DNSEC-signed zone using NSEC3, an attacker can lead the targeted resolver to a CPU exhaustion, further leading to a Denial of Service on the targeted host. This vulnerability applies only for systems where DNSSEC validation is enabled.
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2024:0995 0 None None None 2024-02-26 21:47:08 UTC
Red Hat Product Errata RHBA-2024:0996 0 None None None 2024-02-26 22:03:43 UTC
Red Hat Product Errata RHBA-2024:0997 0 None None None 2024-02-26 21:54:29 UTC
Red Hat Product Errata RHBA-2024:1024 0 None None None 2024-02-28 16:18:36 UTC
Red Hat Product Errata RHBA-2024:1033 0 None None None 2024-02-28 21:38:54 UTC
Red Hat Product Errata RHBA-2024:1035 0 None None None 2024-02-29 01:47:31 UTC
Red Hat Product Errata RHBA-2024:1042 0 None None None 2024-02-29 09:08:55 UTC
Red Hat Product Errata RHBA-2024:1185 0 None None None 2024-03-06 05:44:04 UTC
Red Hat Product Errata RHBA-2024:1339 0 None None None 2024-03-14 18:54:20 UTC
Red Hat Product Errata RHBA-2024:1340 0 None None None 2024-03-14 18:54:22 UTC
Red Hat Product Errata RHBA-2024:1342 0 None None None 2024-03-14 21:00:22 UTC
Red Hat Product Errata RHBA-2024:1577 0 None None None 2024-04-01 01:06:34 UTC
Red Hat Product Errata RHBA-2024:1792 0 None None None 2024-04-11 19:32:16 UTC
Red Hat Product Errata RHBA-2024:1805 0 None None None 2024-04-15 01:37:29 UTC
Red Hat Product Errata RHBA-2024:1811 0 None None None 2024-04-15 02:08:29 UTC
Red Hat Product Errata RHBA-2024:1933 0 None None None 2024-04-22 05:29:19 UTC
Red Hat Product Errata RHBA-2024:2714 0 None None None 2024-05-06 16:50:57 UTC
Red Hat Product Errata RHBA-2024:2800 0 None None None 2024-05-09 14:59:23 UTC
Red Hat Product Errata RHBA-2024:2948 0 None None None 2024-05-21 18:16:22 UTC
Red Hat Product Errata RHSA-2024:0965 0 None None None 2024-02-26 02:16:19 UTC
Red Hat Product Errata RHSA-2024:0977 0 None None None 2024-02-26 08:41:48 UTC
Red Hat Product Errata RHSA-2024:0981 0 None None None 2024-02-26 09:30:09 UTC
Red Hat Product Errata RHSA-2024:0982 0 None None None 2024-02-26 09:32:36 UTC
Red Hat Product Errata RHSA-2024:1334 0 None None None 2024-03-14 15:25:19 UTC
Red Hat Product Errata RHSA-2024:1335 0 None None None 2024-03-14 15:28:12 UTC
Red Hat Product Errata RHSA-2024:1522 0 None None None 2024-03-26 12:36:22 UTC
Red Hat Product Errata RHSA-2024:1543 0 None None None 2024-03-27 15:01:17 UTC
Red Hat Product Errata RHSA-2024:1544 0 None None None 2024-03-27 15:05:27 UTC
Red Hat Product Errata RHSA-2024:1545 0 None None None 2024-03-27 15:05:57 UTC
Red Hat Product Errata RHSA-2024:1647 0 None None None 2024-04-02 20:49:57 UTC
Red Hat Product Errata RHSA-2024:1648 0 None None None 2024-04-02 20:50:43 UTC
Red Hat Product Errata RHSA-2024:1781 0 None None None 2024-04-11 10:59:58 UTC
Red Hat Product Errata RHSA-2024:1782 0 None None None 2024-04-11 11:11:10 UTC
Red Hat Product Errata RHSA-2024:1789 0 None None None 2024-04-11 17:43:14 UTC
Red Hat Product Errata RHSA-2024:1800 0 None None None 2024-04-15 01:26:35 UTC
Red Hat Product Errata RHSA-2024:1801 0 None None None 2024-04-15 01:26:11 UTC
Red Hat Product Errata RHSA-2024:1803 0 None None None 2024-04-15 01:47:26 UTC
Red Hat Product Errata RHSA-2024:1804 0 None None None 2024-04-15 01:38:51 UTC
Red Hat Product Errata RHSA-2024:2551 0 None None None 2024-04-30 14:37:44 UTC
Red Hat Product Errata RHSA-2024:2587 0 None None None 2024-04-30 15:06:20 UTC
Red Hat Product Errata RHSA-2024:2696 0 None None None 2024-05-06 01:12:03 UTC
Red Hat Product Errata RHSA-2024:2720 0 None None None 2024-05-07 07:24:30 UTC
Red Hat Product Errata RHSA-2024:2721 0 None None None 2024-05-07 07:44:54 UTC
Red Hat Product Errata RHSA-2024:2821 0 None None None 2024-05-13 01:28:20 UTC
Red Hat Product Errata RHSA-2024:2890 0 None None None 2024-05-16 17:36:59 UTC
Red Hat Product Errata RHSA-2024:3271 0 None None None 2024-05-22 11:41:37 UTC

Description Marco Benatto 2024-02-12 19:22:00 UTC 
The processing of responses coming from DNSSEC-signed zones using NSEC3 can cause CPU exhaustion on a DNSSEC-validating resolver.
Comment 4 Dhananjay Arunesh 2024-02-13 16:48:54 UTC 
Created bind tracking bugs for this issue:

Affects: fedora-all [bug 2264068]
Comment 6 Petr Menšík 2024-02-13 18:20:07 UTC 
Quite surprising information for me. This seems to have been coordinated among multiple vendors. This is issue not only in BIND9, but any validating resolvers it seems!
Found out just by coincidence at:
https://fosstodon.org/@tychotithonus@infosec.exchange/111924626751024210

- unbound is affected as well: https://github.com/NLnetLabs/unbound/releases/tag/release-1.19.1
- dnsmasq is affected too: https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2024q1/017430.html

Somehow I expect systemd-resolved to be affected too, when everyone else is.
Comment 7 Petr Menšík 2024-02-13 18:21:17 UTC 
Related to bug #2263914.

ISC KB article: https://kb.isc.org/docs/cve-2023-50868
Comment 9 Zack Miele 2024-02-13 21:53:23 UTC 
Created dnsmasq tracking bugs for this issue:

Affects: fedora-all [bug 2264102]


Created unbound tracking bugs for this issue:

Affects: fedora-all [bug 2264101]
Comment 11 Dhananjay Arunesh 2024-02-15 08:25:09 UTC 
Created dhcp tracking bugs for this issue:

Affects: fedora-all [bug 2264364]
Comment 15 errata-xmlrpc 2024-02-26 02:16:17 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:0965 https://access.redhat.com/errata/RHSA-2024:0965
Comment 16 errata-xmlrpc 2024-02-26 08:41:46 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:0977 https://access.redhat.com/errata/RHSA-2024:0977
Comment 17 errata-xmlrpc 2024-02-26 09:30:07 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Extended Update Support

Via RHSA-2024:0981 https://access.redhat.com/errata/RHSA-2024:0981
Comment 18 errata-xmlrpc 2024-02-26 09:32:34 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Extended Update Support

Via RHSA-2024:0982 https://access.redhat.com/errata/RHSA-2024:0982
Comment 20 errata-xmlrpc 2024-03-14 15:25:18 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:1334 https://access.redhat.com/errata/RHSA-2024:1334
Comment 21 errata-xmlrpc 2024-03-14 15:28:10 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:1335 https://access.redhat.com/errata/RHSA-2024:1335
Comment 22 errata-xmlrpc 2024-03-26 12:36:20 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Extended Update Support

Via RHSA-2024:1522 https://access.redhat.com/errata/RHSA-2024:1522
Comment 25 errata-xmlrpc 2024-03-27 15:01:15 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Extended Update Support

Via RHSA-2024:1543 https://access.redhat.com/errata/RHSA-2024:1543
Comment 26 errata-xmlrpc 2024-03-27 15:05:25 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Extended Update Support

Via RHSA-2024:1544 https://access.redhat.com/errata/RHSA-2024:1544
Comment 27 errata-xmlrpc 2024-03-27 15:05:56 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Extended Update Support

Via RHSA-2024:1545 https://access.redhat.com/errata/RHSA-2024:1545
Comment 28 errata-xmlrpc 2024-04-02 20:49:55 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Extended Update Support

Via RHSA-2024:1647 https://access.redhat.com/errata/RHSA-2024:1647
Comment 29 errata-xmlrpc 2024-04-02 20:50:41 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Extended Update Support

Via RHSA-2024:1648 https://access.redhat.com/errata/RHSA-2024:1648
Comment 31 errata-xmlrpc 2024-04-11 10:59:57 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:1781 https://access.redhat.com/errata/RHSA-2024:1781
Comment 32 errata-xmlrpc 2024-04-11 11:11:09 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:1782 https://access.redhat.com/errata/RHSA-2024:1782
Comment 33 errata-xmlrpc 2024-04-11 17:43:12 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:1789 https://access.redhat.com/errata/RHSA-2024:1789
Comment 34 errata-xmlrpc 2024-04-15 01:26:09 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Extended Update Support

Via RHSA-2024:1801 https://access.redhat.com/errata/RHSA-2024:1801
Comment 35 errata-xmlrpc 2024-04-15 01:26:33 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Extended Update Support

Via RHSA-2024:1800 https://access.redhat.com/errata/RHSA-2024:1800
Comment 36 errata-xmlrpc 2024-04-15 01:38:50 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Extended Update Support

Via RHSA-2024:1804 https://access.redhat.com/errata/RHSA-2024:1804
Comment 37 errata-xmlrpc 2024-04-15 01:47:24 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Extended Update Support

Via RHSA-2024:1803 https://access.redhat.com/errata/RHSA-2024:1803
Comment 39 errata-xmlrpc 2024-04-30 14:37:42 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2024:2551 https://access.redhat.com/errata/RHSA-2024:2551
Comment 40 errata-xmlrpc 2024-04-30 15:06:18 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Telecommunications Update Service
  Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

Via RHSA-2024:2587 https://access.redhat.com/errata/RHSA-2024:2587
Comment 41 errata-xmlrpc 2024-05-06 01:12:01 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Advanced Update Support
  Red Hat Enterprise Linux 8.2 Telecommunications Update Service
  Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions

Via RHSA-2024:2696 https://access.redhat.com/errata/RHSA-2024:2696
Comment 42 errata-xmlrpc 2024-05-07 07:24:29 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Extended Update Support

Via RHSA-2024:2720 https://access.redhat.com/errata/RHSA-2024:2720
Comment 43 errata-xmlrpc 2024-05-07 07:44:53 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Extended Update Support

Via RHSA-2024:2721 https://access.redhat.com/errata/RHSA-2024:2721
Comment 44 errata-xmlrpc 2024-05-13 01:28:18 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.4 Telecommunications Update Service

Via RHSA-2024:2821 https://access.redhat.com/errata/RHSA-2024:2821
Comment 45 errata-xmlrpc 2024-05-16 17:36:56 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Advanced Update Support

Via RHSA-2024:2890 https://access.redhat.com/errata/RHSA-2024:2890
Comment 46 errata-xmlrpc 2024-05-22 11:41:35 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:3271 https://access.redhat.com/errata/RHSA-2024:3271
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