In BIND 9.3.0 -> 9.11.35, 9.12.0 -> 9.16.21, and versions 9.9.3-S1 -> 9.11.35-S1 and 9.16.8-S1 -> 9.16.21-S1 of BIND Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.18 of the BIND 9.17 development branch, exploitation of broken authoritative servers using a flaw in response processing can cause degradation in BIND resolver performance. The way the lame cache is currently designed makes it possible for its internal data structures to grow almost infinitely, which may cause significant delays in client query processing.
This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.3, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and limited availability for affected systems. Impacting 23 products from isc, from debian, from fedoraproject and 20 others, organizations running these solutions should prioritize assessment and patching.
Reported in 2021, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.
2021-10-27T21:15:07.613
2024-11-21T05:54:34.323
Modified
CVSSv3.1: 5.3 (MEDIUM)
AV:N/AC:L/Au:N/C:N/I:N/A:P
10.0
2.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | isc | bind | < 9.11.36 | Yes |
| Application | isc | bind | < 9.16.22 | Yes |
| Application | isc | bind | < 9.17.19 | Yes |
| Application | isc | bind | 9.9.3 | Yes |
| Application | isc | bind | 9.9.12 | Yes |
| Application | isc | bind | 9.9.13 | Yes |
| Application | isc | bind | 9.10.5 | Yes |
| Application | isc | bind | 9.10.7 | Yes |
| Application | isc | bind | 9.11.3 | Yes |
| Application | isc | bind | 9.11.5 | Yes |
| Application | isc | bind | 9.11.5 | Yes |
| Application | isc | bind | 9.11.5 | Yes |
| Application | isc | bind | 9.11.6 | Yes |
| Application | isc | bind | 9.11.7 | Yes |
| Application | isc | bind | 9.11.8 | Yes |
| Application | isc | bind | 9.11.12 | Yes |
| Application | isc | bind | 9.11.21 | Yes |
| Application | isc | bind | 9.11.27 | Yes |
| Application | isc | bind | 9.11.29 | Yes |
| Application | isc | bind | 9.11.35 | Yes |
| Application | isc | bind | 9.16.8 | Yes |
| Application | isc | bind | 9.16.11 | Yes |
| Application | isc | bind | 9.16.13 | Yes |
| Application | isc | bind | 9.16.21 | Yes |
| Operating System | debian | debian_linux | 9.0 | Yes |
| Operating System | debian | debian_linux | 10.0 | Yes |
| Operating System | debian | debian_linux | 11.0 | Yes |
| Operating System | fedoraproject | fedora | 33 | Yes |
| Operating System | fedoraproject | fedora | 34 | Yes |
| Operating System | fedoraproject | fedora | 35 | Yes |
| Operating System | netapp | h300s_firmware | - | Yes |
| Hardware | netapp | h300s | - | No |
| Operating System | netapp | h500s_firmware | - | Yes |
| Hardware | netapp | h500s | - | No |
| Operating System | netapp | h700s_firmware | - | Yes |
| Hardware | netapp | h700s | - | No |
| Operating System | netapp | h300e_firmware | - | Yes |
| Hardware | netapp | h300e | - | No |
| Operating System | netapp | h500e_firmware | - | Yes |
| Hardware | netapp | h500e | - | No |
| Operating System | netapp | h700e_firmware | - | Yes |
| Hardware | netapp | h700e | - | No |
| Operating System | netapp | h410s_firmware | - | Yes |
| Hardware | netapp | h410s | - | No |
| Operating System | netapp | h410c_firmware | - | Yes |
| Hardware | netapp | h410c | - | No |
| Application | netapp | cloud_backup | - | Yes |
| Application | siemens | sinec_infrastructure_network_services | < 1.0.1.1 | Yes |
| Application | oracle | http_server | 12.2.1.3.0 | Yes |
| Application | oracle | http_server | 12.2.1.4.0 | Yes |
| Application | oracle | zfs_storage_appliance_kit | 8.8 | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For isc's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.