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.
2023-06-21T17:15:47.703
2024-11-21T07:59:22.150
Modified
CVSSv3.1: 7.5 (HIGH)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | isc | bind | ≤ 9.16.41 | Yes |
| Application | isc | bind | ≤ 9.16.41 | Yes |
| Application | isc | bind | ≤ 9.18.15 | Yes |
| Application | isc | bind | ≤ 9.18.15 | Yes |
| Application | isc | bind | ≤ 9.19.13 | Yes |
| Operating System | debian | debian_linux | 10.0 | Yes |
| Operating System | debian | debian_linux | 11.0 | Yes |
| Operating System | debian | debian_linux | 12.0 | Yes |
| Operating System | fedoraproject | fedora | 37 | Yes |
| Operating System | fedoraproject | fedora | 38 | Yes |
| Application | netapp | active_iq_unified_manager | - | Yes |
| Operating System | netapp | h500s_firmware | - | Yes |
| Hardware | netapp | h500s | - | No |
| Operating System | netapp | h700s_firmware | - | Yes |
| Hardware | netapp | h700s | - | No |
| Operating System | netapp | h410s_firmware | - | Yes |
| Hardware | netapp | h410s | - | No |
| Operating System | netapp | h410c_firmware | - | Yes |
| Hardware | netapp | h410c | - | No |
| Operating System | netapp | h300s_firmware | - | Yes |
| Hardware | netapp | h300s | - | No |