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133 vulnerabilities
CVE-2025-11232 (GCVE-0-2025-11232)
Vulnerability from cvelistv5 – Published: 2025-10-29 18:02 – Updated: 2025-11-04 21:09
VLAI?
Summary
To trigger the issue, three configuration parameters must have specific settings: "hostname-char-set" must be left at the default setting, which is "[^A-Za-z0-9.-]"; "hostname-char-replacement" must be empty (the default); and "ddns-qualifying-suffix" must *NOT* be empty (the default is empty). DDNS updates do not need to be enabled for this issue to manifest. A client that sends certain option content would then cause kea-dhcp4 to exit unexpectedly.
This issue affects Kea versions 3.0.1 through 3.0.1 and 3.1.1 through 3.1.2.
Severity ?
7.5 (High)
CWE
- CWE-823 - Use of Out-of-range Pointer Offset
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
Credits
ISC would like to thank Siniša Uskoković and Ralf Steuer from Vienna University of Economics and Business for bringing this vulnerability to our attention.
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CVE-2025-40780 (GCVE-0-2025-40780)
Vulnerability from cvelistv5 – Published: 2025-10-22 15:48 – Updated: 2025-11-04 21:10
VLAI?
Summary
In specific circumstances, due to a weakness in the Pseudo Random Number Generator (PRNG) that is used, it is possible for an attacker to predict the source port and query ID that BIND will use.
This issue affects BIND 9 versions 9.16.0 through 9.16.50, 9.18.0 through 9.18.39, 9.20.0 through 9.20.13, 9.21.0 through 9.21.12, 9.16.8-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.39-S1, and 9.20.9-S1 through 9.20.13-S1.
Severity ?
8.6 (High)
CWE
- CWE-341 - Predictable from Observable State
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| ISC | BIND 9 |
Affected:
9.16.0 , ≤ 9.16.50
(custom)
Affected: 9.18.0 , ≤ 9.18.39 (custom) Affected: 9.20.0 , ≤ 9.20.13 (custom) Affected: 9.21.0 , ≤ 9.21.12 (custom) Affected: 9.16.8-S1 , ≤ 9.16.50-S1 (custom) Affected: 9.18.11-S1 , ≤ 9.18.39-S1 (custom) Affected: 9.20.9-S1 , ≤ 9.20.13-S1 (custom) |
Credits
ISC would like to thank Prof. Amit Klein and Omer Ben Simhon from Hebrew University of Jerusalem for bringing this vulnerability to our attention.
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CVE-2025-40778 (GCVE-0-2025-40778)
Vulnerability from cvelistv5 – Published: 2025-10-22 15:47 – Updated: 2025-11-07 04:56
VLAI?
Summary
Under certain circumstances, BIND is too lenient when accepting records from answers, allowing an attacker to inject forged data into the cache.
This issue affects BIND 9 versions 9.11.0 through 9.16.50, 9.18.0 through 9.18.39, 9.20.0 through 9.20.13, 9.21.0 through 9.21.12, 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.39-S1, and 9.20.9-S1 through 9.20.13-S1.
Severity ?
8.6 (High)
CWE
- CWE-349 - Acceptance of Extraneous Untrusted Data With Trusted Data
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| ISC | BIND 9 |
Affected:
9.11.0 , ≤ 9.16.50
(custom)
Affected: 9.18.0 , ≤ 9.18.39 (custom) Affected: 9.20.0 , ≤ 9.20.13 (custom) Affected: 9.21.0 , ≤ 9.21.12 (custom) Affected: 9.11.3-S1 , ≤ 9.16.50-S1 (custom) Affected: 9.18.11-S1 , ≤ 9.18.39-S1 (custom) Affected: 9.20.9-S1 , ≤ 9.20.13-S1 (custom) |
Credits
ISC would like to thank Yuxiao Wu, Yunyi Zhang, Baojun Liu, and Haixin Duan from Tsinghua University for bringing this vulnerability to our attention.
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CVE-2025-8677 (GCVE-0-2025-8677)
Vulnerability from cvelistv5 – Published: 2025-10-22 15:43 – Updated: 2025-11-04 21:15
VLAI?
Summary
Querying for records within a specially crafted zone containing certain malformed DNSKEY records can lead to CPU exhaustion.
This issue affects BIND 9 versions 9.18.0 through 9.18.39, 9.20.0 through 9.20.13, 9.21.0 through 9.21.12, 9.18.11-S1 through 9.18.39-S1, and 9.20.9-S1 through 9.20.13-S1.
Severity ?
7.5 (High)
CWE
- CWE-405 - Asymmetric Resource Consumption (Amplification)
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
Credits
ISC would like to thank Zuyao Xu and Xiang Li from the All-in-One Security and Privacy Laboratory at Nankai University for bringing this vulnerability to our attention.
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CVE-2025-8696 (GCVE-0-2025-8696)
Vulnerability from cvelistv5 – Published: 2025-09-10 17:59 – Updated: 2025-11-04 21:15
VLAI?
Summary
If an unauthenticated user sends a large amount of data to the Stork UI, it may cause memory and disk use problems for the system running the Stork server.
This issue affects Stork versions 1.0.0 through 2.3.0.
Severity ?
7.5 (High)
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
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CVE-2025-40779 (GCVE-0-2025-40779)
Vulnerability from cvelistv5 – Published: 2025-08-27 20:23 – Updated: 2025-11-04 21:10
VLAI?
Summary
If a DHCPv4 client sends a request with some specific options, and Kea fails to find an appropriate subnet for the client, the `kea-dhcp4` process will abort with an assertion failure. This happens only if the client request is unicast directly to Kea; broadcast messages do not cause the problem.
This issue affects Kea versions 2.7.1 through 2.7.9, 3.0.0, and 3.1.0.
Severity ?
7.5 (High)
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
Credits
ISC would like to thank the following for bringing this vulnerability to our attention:
* Jochen M.
* Martin Dinev, Trading212
* Ashwani Kumar, Post Graduate Institute of Medical Education & Research, Chandigarh, India
* Bret Giddings, University of Essex
* Florian Ritterhoff, Munich University of Applied Sciences
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CVE-2025-40777 (GCVE-0-2025-40777)
Vulnerability from cvelistv5 – Published: 2025-07-16 17:38 – Updated: 2025-11-04 21:10
VLAI?
Summary
If a `named` caching resolver is configured with `serve-stale-enable` `yes`, and with `stale-answer-client-timeout` set to `0` (the only allowable value other than `disabled`), and if the resolver, in the process of resolving a query, encounters a CNAME chain involving a specific combination of cached or authoritative records, the daemon will abort with an assertion failure.
This issue affects BIND 9 versions 9.20.0 through 9.20.10, 9.21.0 through 9.21.9, and 9.20.9-S1 through 9.20.10-S1.
Severity ?
7.5 (High)
CWE
- CWE-617 - Reachable Assertion
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
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CVE-2025-40776 (GCVE-0-2025-40776)
Vulnerability from cvelistv5 – Published: 2025-07-16 13:41 – Updated: 2025-07-22 14:55
VLAI?
Summary
A `named` caching resolver that is configured to send ECS (EDNS Client Subnet) options may be vulnerable to a cache-poisoning attack.
This issue affects BIND 9 versions 9.11.3-S1 through 9.16.50-S1, 9.18.11-S1 through 9.18.37-S1, and 9.20.9-S1 through 9.20.10-S1.
Severity ?
8.6 (High)
CWE
- CWE-349 - Acceptance of Extraneous Untrusted Data With Trusted Data
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
Credits
ISC would like to thank Xiang Li from AOSP Lab of Nankai University for bringing this vulnerability to our attention.
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CVE-2025-32803 (GCVE-0-2025-32803)
Vulnerability from cvelistv5 – Published: 2025-05-28 17:08 – Updated: 2025-05-28 17:28
VLAI?
Summary
In some cases, Kea log files or lease files may be world-readable.
This issue affects Kea versions 2.4.0 through 2.4.1, 2.6.0 through 2.6.2, and 2.7.0 through 2.7.8.
Severity ?
4 (Medium)
CWE
- CWE-276 - Incorrect Default Permissions
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
Credits
ISC would like to thank Matthias Gerstner from the SUSE security team for bringing this vulnerability to our attention.
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CVE-2025-32802 (GCVE-0-2025-32802)
Vulnerability from cvelistv5 – Published: 2025-05-28 17:08 – Updated: 2025-05-28 17:23
VLAI?
Summary
Kea configuration and API directives can be used to overwrite arbitrary files, subject to permissions granted to Kea. Many common configurations run Kea as root, leave the API entry points unsecured by default, and/or place the control sockets in insecure paths.
This issue affects Kea versions 2.4.0 through 2.4.1, 2.6.0 through 2.6.2, and 2.7.0 through 2.7.8.
Severity ?
6.1 (Medium)
CWE
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
Credits
ISC would like to thank Matthias Gerstner from the SUSE security team for bringing this vulnerability to our attention.
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CVE-2025-32801 (GCVE-0-2025-32801)
Vulnerability from cvelistv5 – Published: 2025-05-28 17:03 – Updated: 2025-05-28 17:33
VLAI?
Summary
Kea configuration and API directives can be used to load a malicious hook library. Many common configurations run Kea as root, leave the API entry points unsecured by default, and/or place the control sockets in insecure paths.
This issue affects Kea versions 2.4.0 through 2.4.1, 2.6.0 through 2.6.2, and 2.7.0 through 2.7.8.
Severity ?
7.8 (High)
CWE
- CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
Credits
ISC would like to thank Matthias Gerstner from the SUSE security team and Laura Pardo from Red Hat's Product Security Team for bringing this vulnerability to our attention.
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CVE-2025-40775 (GCVE-0-2025-40775)
Vulnerability from cvelistv5 – Published: 2025-05-21 12:35 – Updated: 2025-05-23 13:11
VLAI?
Summary
When an incoming DNS protocol message includes a Transaction Signature (TSIG), BIND always checks it. If the TSIG contains an invalid value in the algorithm field, BIND immediately aborts with an assertion failure.
This issue affects BIND 9 versions 9.20.0 through 9.20.8 and 9.21.0 through 9.21.7.
Severity ?
7.5 (High)
CWE
- CWE-232 - Improper Handling of Undefined Values
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
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CVE-2024-12705 (GCVE-0-2024-12705)
Vulnerability from cvelistv5 – Published: 2025-01-29 21:40 – Updated: 2025-02-07 17:02
VLAI?
Summary
Clients using DNS-over-HTTPS (DoH) can exhaust a DNS resolver's CPU and/or memory by flooding it with crafted valid or invalid HTTP/2 traffic.
This issue affects BIND 9 versions 9.18.0 through 9.18.32, 9.20.0 through 9.20.4, 9.21.0 through 9.21.3, and 9.18.11-S1 through 9.18.32-S1.
Severity ?
7.5 (High)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
Credits
ISC would like to thank Jean-François Billaud for bringing this vulnerability to our attention.
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CVE-2024-11187 (GCVE-0-2024-11187)
Vulnerability from cvelistv5 – Published: 2025-01-29 21:40 – Updated: 2025-02-11 19:02
VLAI?
Summary
It is possible to construct a zone such that some queries to it will generate responses containing numerous records in the Additional section. An attacker sending many such queries can cause either the authoritative server itself or an independent resolver to use disproportionate resources processing the queries. Zones will usually need to have been deliberately crafted to attack this exposure.
This issue affects BIND 9 versions 9.11.0 through 9.11.37, 9.16.0 through 9.16.50, 9.18.0 through 9.18.32, 9.20.0 through 9.20.4, 9.21.0 through 9.21.3, 9.11.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.50-S1, and 9.18.11-S1 through 9.18.32-S1.
Severity ?
7.5 (High)
CWE
- CWE-405 - Asymmetric Resource Consumption (Amplification)
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| ISC | BIND 9 |
Affected:
9.11.0 , ≤ 9.11.37
(custom)
Affected: 9.16.0 , ≤ 9.16.50 (custom) Affected: 9.18.0 , ≤ 9.18.32 (custom) Affected: 9.20.0 , ≤ 9.20.4 (custom) Affected: 9.21.0 , ≤ 9.21.3 (custom) Affected: 9.11.3-S1 , ≤ 9.11.37-S1 (custom) Affected: 9.16.8-S1 , ≤ 9.16.50-S1 (custom) Affected: 9.18.11-S1 , ≤ 9.18.32-S1 (custom) |
Credits
ISC would like to thank Toshifumi Sakaguchi for bringing this vulnerability to our attention.
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CVE-2024-4076 (GCVE-0-2024-4076)
Vulnerability from cvelistv5 – Published: 2024-07-23 14:40 – Updated: 2025-02-13 17:53
VLAI?
Summary
Client queries that trigger serving stale data and that also require lookups in local authoritative zone data may result in an assertion failure.
This issue affects BIND 9 versions 9.16.13 through 9.16.50, 9.18.0 through 9.18.27, 9.19.0 through 9.19.24, 9.11.33-S1 through 9.11.37-S1, 9.16.13-S1 through 9.16.50-S1, and 9.18.11-S1 through 9.18.27-S1.
Severity ?
7.5 (High)
CWE
- CWE-617 - Reachable Assertion
Assigner
References
Impacted products
Credits
ISC would like to thank Daniel Stränger for bringing this vulnerability to our attention.
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CVE-2024-1975 (GCVE-0-2024-1975)
Vulnerability from cvelistv5 – Published: 2024-07-23 14:38 – Updated: 2025-02-13 17:32
VLAI?
Summary
If a server hosts a zone containing a "KEY" Resource Record, or a resolver DNSSEC-validates a "KEY" Resource Record from a DNSSEC-signed domain in cache, a client can exhaust resolver CPU resources by sending a stream of SIG(0) signed requests.
This issue affects BIND 9 versions 9.0.0 through 9.11.37, 9.16.0 through 9.16.50, 9.18.0 through 9.18.27, 9.19.0 through 9.19.24, 9.9.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.49-S1, and 9.18.11-S1 through 9.18.27-S1.
Severity ?
7.5 (High)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| ISC | BIND 9 |
Affected:
9.0.0 , ≤ 9.11.37
(custom)
Affected: 9.16.0 , ≤ 9.16.50 (custom) Affected: 9.18.0 , ≤ 9.18.27 (custom) Affected: 9.19.0 , ≤ 9.19.24 (custom) Affected: 9.9.3-S1 , ≤ 9.11.37-S1 (custom) Affected: 9.16.8-S1 , ≤ 9.16.49-S1 (custom) Affected: 9.18.11-S1 , ≤ 9.18.27-S1 (custom) |
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CVE-2024-1737 (GCVE-0-2024-1737)
Vulnerability from cvelistv5 – Published: 2024-07-23 14:34 – Updated: 2025-02-13 17:32
VLAI?
Summary
Resolver caches and authoritative zone databases that hold significant numbers of RRs for the same hostname (of any RTYPE) can suffer from degraded performance as content is being added or updated, and also when handling client queries for this name.
This issue affects BIND 9 versions 9.11.0 through 9.11.37, 9.16.0 through 9.16.50, 9.18.0 through 9.18.27, 9.19.0 through 9.19.24, 9.11.4-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.50-S1, and 9.18.11-S1 through 9.18.27-S1.
Severity ?
7.5 (High)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| ISC | BIND 9 |
Affected:
9.11.0 , ≤ 9.11.37
(custom)
Affected: 9.16.0 , ≤ 9.16.50 (custom) Affected: 9.18.0 , ≤ 9.18.27 (custom) Affected: 9.19.0 , ≤ 9.19.24 (custom) Affected: 9.11.4-S1 , ≤ 9.11.37-S1 (custom) Affected: 9.16.8-S1 , ≤ 9.16.50-S1 (custom) Affected: 9.18.11-S1 , ≤ 9.18.27-S1 (custom) |
Credits
ISC would like to thank Toshifumi Sakaguchi for bringing this vulnerability to our attention.
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CVE-2024-0760 (GCVE-0-2024-0760)
Vulnerability from cvelistv5 – Published: 2024-07-23 14:26 – Updated: 2025-02-13 17:27
VLAI?
Summary
A malicious client can send many DNS messages over TCP, potentially causing the server to become unstable while the attack is in progress. The server may recover after the attack ceases. Use of ACLs will not mitigate the attack.
This issue affects BIND 9 versions 9.18.1 through 9.18.27, 9.19.0 through 9.19.24, and 9.18.11-S1 through 9.18.27-S1.
Severity ?
7.5 (High)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
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CVE-2024-28872 (GCVE-0-2024-28872)
Vulnerability from cvelistv5 – Published: 2024-07-11 14:49 – Updated: 2025-03-26 14:40
VLAI?
Summary
The TLS certificate validation code is flawed. An attacker can obtain a TLS certificate from the Stork server and use it to connect to the Stork agent. Once this connection is established with the valid certificate, the attacker can send malicious commands to a monitored service (Kea or BIND 9), possibly resulting in confidential data loss and/or denial of service. It should be noted that this vulnerability is not related to BIND 9 or Kea directly, and only customers using the Stork management tool are potentially affected.
This issue affects Stork versions 0.15.0 through 1.15.0.
Severity ?
8.9 (High)
CWE
- CWE-295 - Improper Certificate Validation
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
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CVE-2023-6516 (GCVE-0-2023-6516)
Vulnerability from cvelistv5 – Published: 2024-02-13 14:05 – Updated: 2025-02-13 17:26
VLAI?
Summary
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.
Severity ?
7.5 (High)
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
References
Impacted products
Credits
ISC would like to thank Infoblox for bringing this vulnerability to our attention.
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CVE-2023-5680 (GCVE-0-2023-5680)
Vulnerability from cvelistv5 – Published: 2024-02-13 14:05 – Updated: 2025-03-17 15:04
VLAI?
Summary
If a resolver cache has a very large number of ECS records stored for the same name, the process of cleaning the cache database node for this name can significantly impair query performance.
This issue affects BIND 9 versions 9.11.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.45-S1, and 9.18.11-S1 through 9.18.21-S1.
Severity ?
5.3 (Medium)
Assigner
References
| URL | Tags | |
|---|---|---|
Impacted products
Credits
ISC would like to thank Yann Kerherve and Ask Bjørn Hansen for bringing this vulnerability to our attention.
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CVE-2023-5679 (GCVE-0-2023-5679)
Vulnerability from cvelistv5 – Published: 2024-02-13 14:05 – Updated: 2025-03-28 23:51
VLAI?
Summary
A bad interaction between DNS64 and serve-stale may cause `named` to crash with an assertion failure during recursive resolution, when both of these features are enabled.
This issue affects BIND 9 versions 9.16.12 through 9.16.45, 9.18.0 through 9.18.21, 9.19.0 through 9.19.19, 9.16.12-S1 through 9.16.45-S1, and 9.18.11-S1 through 9.18.21-S1.
Severity ?
7.5 (High)
CWE
- CWE-617 - Reachable Assertion
Assigner
References
Impacted products
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CVE-2023-5517 (GCVE-0-2023-5517)
Vulnerability from cvelistv5 – Published: 2024-02-13 14:04 – Updated: 2025-02-13 17:25
VLAI?
Summary
A flaw in query-handling code can cause `named` to exit prematurely with an assertion failure when:
- `nxdomain-redirect <domain>;` is configured, and
- the resolver receives a PTR query for an RFC 1918 address that would normally result in an authoritative NXDOMAIN response.
This issue affects BIND 9 versions 9.12.0 through 9.16.45, 9.18.0 through 9.18.21, 9.19.0 through 9.19.19, 9.16.8-S1 through 9.16.45-S1, and 9.18.11-S1 through 9.18.21-S1.
Severity ?
7.5 (High)
CWE
- CWE-617 - Reachable Assertion
Assigner
References
| URL | Tags | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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CVE-2023-4408 (GCVE-0-2023-4408)
Vulnerability from cvelistv5 – Published: 2024-02-13 14:04 – Updated: 2025-03-14 16:16
VLAI?
Summary
The DNS message parsing code in `named` includes a section whose computational complexity is overly high. It does not cause problems for typical DNS traffic, but crafted queries and responses may cause excessive CPU load on the affected `named` instance by exploiting this flaw. This issue affects both authoritative servers and recursive resolvers.
This issue affects BIND 9 versions 9.0.0 through 9.16.45, 9.18.0 through 9.18.21, 9.19.0 through 9.19.19, 9.9.3-S1 through 9.11.37-S1, 9.16.8-S1 through 9.16.45-S1, and 9.18.11-S1 through 9.18.21-S1.
Severity ?
7.5 (High)
CWE
- CWE-407 - Inefficient Algorithmic Complexity
Assigner
References
| URL | Tags | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||
Impacted products
Credits
ISC would like to thank Shoham Danino from Reichman University, Anat Bremler-Barr from Tel-Aviv University, Yehuda Afek from Tel-Aviv University, and Yuval Shavitt from Tel-Aviv University for bringing this vulnerability to our attention.
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CVE-2023-4236 (GCVE-0-2023-4236)
Vulnerability from cvelistv5 – Published: 2023-09-20 12:32 – Updated: 2025-02-13 17:09
VLAI?
Summary
A flaw in the networking code handling DNS-over-TLS queries may cause `named` to terminate unexpectedly due to an assertion failure. This happens when internal data structures are incorrectly reused under significant DNS-over-TLS query load.
This issue affects BIND 9 versions 9.18.0 through 9.18.18 and 9.18.11-S1 through 9.18.18-S1.
Severity ?
7.5 (High)
Assigner
References
| URL | Tags | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||
Impacted products
Credits
ISC would like to thank Robert Story from the USC/ISI DNS root server operations team for bringing this vulnerability to our attention.
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CVE-2023-3341 (GCVE-0-2023-3341)
Vulnerability from cvelistv5 – Published: 2023-09-20 12:32 – Updated: 2025-12-02 20:15
VLAI?
Summary
The code that processes control channel messages sent to `named` calls certain functions recursively during packet parsing. Recursion depth is only limited by the maximum accepted packet size; depending on the environment, this may cause the packet-parsing code to run out of available stack memory, causing `named` to terminate unexpectedly. Since each incoming control channel message is fully parsed before its contents are authenticated, exploiting this flaw does not require the attacker to hold a valid RNDC key; only network access to the control channel's configured TCP port is necessary.
This issue affects BIND 9 versions 9.2.0 through 9.16.43, 9.18.0 through 9.18.18, 9.19.0 through 9.19.16, 9.9.3-S1 through 9.16.43-S1, and 9.18.0-S1 through 9.18.18-S1.
Severity ?
7.5 (High)
CWE
- CWE-1325 - Improperly Controlled Sequential Memory Allocation
Assigner
References
| URL | Tags | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
Impacted products
Credits
ISC would like to thank Eric Sesterhenn from X41 D-Sec GmbH for bringing this vulnerability to our attention.
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CVE-2023-2911 (GCVE-0-2023-2911)
Vulnerability from cvelistv5 – Published: 2023-06-21 16:26 – Updated: 2025-02-13 16:49
VLAI?
Summary
If the `recursive-clients` quota is reached on a BIND 9 resolver configured with both `stale-answer-enable yes;` and `stale-answer-client-timeout 0;`, a sequence of serve-stale-related lookups could cause `named` to loop and terminate unexpectedly due to a stack overflow.
This issue affects BIND 9 versions 9.16.33 through 9.16.41, 9.18.7 through 9.18.15, 9.16.33-S1 through 9.16.41-S1, and 9.18.11-S1 through 9.18.15-S1.
Severity ?
7.5 (High)
Assigner
References
| URL | Tags | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
Impacted products
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CVE-2023-2829 (GCVE-0-2023-2829)
Vulnerability from cvelistv5 – Published: 2023-06-21 16:26 – Updated: 2025-02-13 16:48
VLAI?
Summary
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.
Severity ?
7.5 (High)
Assigner
References
| URL | Tags | |
|---|---|---|
Impacted products
Credits
ISC would like to thank Greg Kuechle from SaskTel for bringing this vulnerability to our attention.
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CVE-2023-2828 (GCVE-0-2023-2828)
Vulnerability from cvelistv5 – Published: 2023-06-21 16:26 – Updated: 2025-02-13 16:48
VLAI?
Summary
Every `named` instance configured to run as a recursive resolver maintains a cache database holding the responses to the queries it has recently sent to authoritative servers. The size limit for that cache database can be configured using the `max-cache-size` statement in the configuration file; it defaults to 90% of the total amount of memory available on the host. When the size of the cache reaches 7/8 of the configured limit, a cache-cleaning algorithm starts to remove expired and/or least-recently used RRsets from the cache, to keep memory use below the configured limit.
It has been discovered that the effectiveness of the cache-cleaning algorithm used in `named` can be severely diminished by querying the resolver for specific RRsets in a certain order, effectively allowing the configured `max-cache-size` limit to be significantly exceeded.
This issue affects BIND 9 versions 9.11.0 through 9.16.41, 9.18.0 through 9.18.15, 9.19.0 through 9.19.13, 9.11.3-S1 through 9.16.41-S1, and 9.18.11-S1 through 9.18.15-S1.
Severity ?
7.5 (High)
Assigner
References
| URL | Tags | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||
Impacted products
Credits
ISC would like to thank Shoham Danino from Reichman University, Anat Bremler-Barr from Tel-Aviv University, Yehuda Afek from Tel-Aviv University, and Yuval Shavitt from Tel-Aviv University for bringing this vulnerability to our attention.
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CVE-2022-3924 (GCVE-0-2022-3924)
Vulnerability from cvelistv5 – Published: 2023-01-25 21:39 – Updated: 2025-03-31 13:58
VLAI?
Summary
This issue can affect BIND 9 resolvers with `stale-answer-enable yes;` that also make use of the option `stale-answer-client-timeout`, configured with a value greater than zero.
If the resolver receives many queries that require recursion, there will be a corresponding increase in the number of clients that are waiting for recursion to complete. If there are sufficient clients already waiting when a new client query is received so that it is necessary to SERVFAIL the longest waiting client (see BIND 9 ARM `recursive-clients` limit and soft quota), then it is possible for a race to occur between providing a stale answer to this older client and sending an early timeout SERVFAIL, which may cause an assertion failure.
This issue affects BIND 9 versions 9.16.12 through 9.16.36, 9.18.0 through 9.18.10, 9.19.0 through 9.19.8, and 9.16.12-S1 through 9.16.36-S1.
Severity ?
7.5 (High)
CWE
- n/a
Assigner
References
| URL | Tags | ||||
|---|---|---|---|---|---|
|
|||||
Impacted products
Credits
ISC would like to thank Maksym Odinintsev from AWS for bringing this vulnerability to our attention.
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],
"source": {
"discovery": "EXTERNAL"
},
"title": "named configured to answer from stale cache may terminate unexpectedly at recursive-clients soft quota",
"workarounds": [
{
"lang": "en",
"value": "Disabling `stale-answer-client-timeout` entirely or setting the timeout value to zero prevents the problem.\n\nIt is not possible to disable the limit on `recursive-clients`, though it could be set to a very high value in order to reduce the likelihood of encountering this scenario. However, this is not recommended as the limit on recursive clients is important for preventing exhaustion of server resources."
}
]
}
},
"cveMetadata": {
"assignerOrgId": "404fd4d2-a609-4245-b543-2c944a302a22",
"assignerShortName": "isc",
"cveId": "CVE-2022-3924",
"datePublished": "2023-01-25T21:39:49.110Z",
"dateReserved": "2022-11-10T09:07:37.642Z",
"dateUpdated": "2025-03-31T13:58:09.212Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}