CVE-2023-6516
BIND Recursive Resolver Cache Database Denial of Service Vulnerability
Description
To keep its cache database efficient, `named` running as a recursive resolver occasionally attempts to clean up the database. It uses several methods, including some that are asynchronous: a small chunk of memory pointing to the cache element that can be cleaned up is first allocated and then queued for later processing. It was discovered that if the resolver is continuously processing query patterns triggering this type of cache-database maintenance, `named` may not be able to handle the cleanup events in a timely manner. This in turn enables the list of queued cleanup events to grow infinitely large over time, allowing the configured `max-cache-size` limit to be significantly exceeded. This issue affects BIND 9 versions 9.16.0 through 9.16.45 and 9.16.8-S1 through 9.16.45-S1.
INFO
Published Date :
Feb. 13, 2024, 2:15 p.m.
Last Modified :
Oct. 22, 2024, 6:14 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
3.9
Public PoC/Exploit Available at Github
CVE-2023-6516 has a 2 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2023-6516.
| URL | Resource |
|---|---|
| http://www.openwall.com/lists/oss-security/2024/02/13/1 | Mailing List Third Party Advisory |
| https://kb.isc.org/docs/cve-2023-6516 | Vendor Advisory |
| https://lists.fedoraproject.org/archives/list/[email protected]/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/ | Mailing List Third Party Advisory |
| https://lists.fedoraproject.org/archives/list/[email protected]/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/ | Mailing List Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20240503-0008/ | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
asp-net-core csharp docker dockerfile javascript react webapi docker-compose
C# Dockerfile HTML JavaScript CSS
Docker image for MarkLogic Server
database docker marklogic
Makefile Shell RobotFramework XQuery
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-6516 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-6516 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Oct. 22, 2024
Action Type Old Value New Value Changed Reference Type http://www.openwall.com/lists/oss-security/2024/02/13/1 No Types Assigned http://www.openwall.com/lists/oss-security/2024/02/13/1 Mailing List, Third Party Advisory Changed Reference Type https://kb.isc.org/docs/cve-2023-6516 No Types Assigned https://kb.isc.org/docs/cve-2023-6516 Vendor Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/ Mailing List, Third Party Advisory Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/ Mailing List, Third Party Advisory Changed Reference Type https://security.netapp.com/advisory/ntap-20240503-0008/ No Types Assigned https://security.netapp.com/advisory/ntap-20240503-0008/ Third Party Advisory Added CWE NIST CWE-770 Added CPE Configuration OR *cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:* versions from (including) 9.16.0 up to (including) 9.16.45 *cpe:2.3:a:isc:bind:9.16.8:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.16.11:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.16.12:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.16.13:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.16.14:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.16.21:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.16.32:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.16.36:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.16.43:s1:*:*:supported_preview:*:*:* *cpe:2.3:a:isc:bind:9.16.45:s1:*:*:supported_preview:*:*:* Added CPE Configuration OR *cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 03, 2024
Action Type Old Value New Value Added CWE CISA-ADP CWE-789 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
May. 03, 2024
Action Type Old Value New Value Added Reference Internet Systems Consortium (ISC) https://security.netapp.com/advisory/ntap-20240503-0008/ [No types assigned] -
CVE Modified by [email protected]
Mar. 04, 2024
Action Type Old Value New Value Added Reference Internet Systems Consortium (ISC) https://lists.fedoraproject.org/archives/list/[email protected]/message/ZDZFMEKQTZ4L7RY46FCENWFB5MDT263R/ [No types assigned] -
CVE Modified by [email protected]
Feb. 19, 2024
Action Type Old Value New Value Added Reference Internet Systems Consortium (ISC) https://lists.fedoraproject.org/archives/list/[email protected]/message/PNNHZSZPG2E7NBMBNYPGHCFI4V4XRWNQ/ [No types assigned] -
CVE Modified by [email protected]
Feb. 13, 2024
Action Type Old Value New Value Added Reference Internet Systems Consortium (ISC) http://www.openwall.com/lists/oss-security/2024/02/13/1 [No types assigned] -
CVE Received by [email protected]
Feb. 13, 2024
Action Type Old Value New Value Added Description To keep its cache database efficient, `named` running as a recursive resolver occasionally attempts to clean up the database. It uses several methods, including some that are asynchronous: a small chunk of memory pointing to the cache element that can be cleaned up is first allocated and then queued for later processing. It was discovered that if the resolver is continuously processing query patterns triggering this type of cache-database maintenance, `named` may not be able to handle the cleanup events in a timely manner. This in turn enables the list of queued cleanup events to grow infinitely large over time, allowing the configured `max-cache-size` limit to be significantly exceeded. This issue affects BIND 9 versions 9.16.0 through 9.16.45 and 9.16.8-S1 through 9.16.45-S1. Added Reference Internet Systems Consortium (ISC) https://kb.isc.org/docs/cve-2023-6516 [No types assigned] Added CVSS V3.1 Internet Systems Consortium (ISC) AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-6516 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2023-6516
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.22 }} 0.11%
score
0.59817
percentile