ISC BIND up to 9.16.45/9.16.45-S1 named allocation of resources

Summaryinfo

A vulnerability identified as critical has been detected in ISC BIND up to 9.16.45/9.16.45-S1. This affects an unknown part of the component named. Performing a manipulation results in allocation of resources. This vulnerability was named CVE-2023-6516. The attack may be initiated remotely. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in ISC BIND up to 9.16.45/9.16.45-S1 (Domain Name Software). It has been classified as critical. This affects some unknown functionality of the component named. The manipulation with an unknown input leads to a allocation of resources vulnerability. CWE is classifying the issue as CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. This is going to have an impact on availability. The summary by CVE is:

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.

The weakness was presented 02/13/2024. It is possible to read the advisory at kb.isc.org. This vulnerability is uniquely identified as CVE-2023-6516 since 12/05/2023. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 9.16.48 or 9.16.48-S1 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Domain Name Software

Vendor

• ISC

Name

• BIND

Version

• 9.16.0
• 9.16.1
• 9.16.2
• 9.16.3
• 9.16.4
• 9.16.5
• 9.16.6
• 9.16.7
• 9.16.8
• 9.16.9
• 9.16.10
• 9.16.11
• 9.16.12
• 9.16.13
• 9.16.14
• 9.16.15
• 9.16.16
• 9.16.17
• 9.16.18
• 9.16.19
• 9.16.20
• 9.16.21
• 9.16.22
• 9.16.23
• 9.16.24
• 9.16.25
• 9.16.26
• 9.16.27
• 9.16.28
• 9.16.29
• 9.16.30
• 9.16.31
• 9.16.32
• 9.16.33
• 9.16.34
• 9.16.35
• 9.16.36
• 9.16.37
• 9.16.38
• 9.16.39
• 9.16.40
• 9.16.41
• 9.16.42
• 9.16.43
• 9.16.44
• 9.16.45
• 9.16.45-S1

License

• open-source

Website

• Vendor: https://www.isc.org/

CPE 2.3info

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CPE 2.2info

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