In ISC DHCP 4.4.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1, when the function option_code_hash_lookup() is called from add_option(), it increases the option's refcount field. However, there is not a corresponding call to option_dereference() to decrement the refcount field. The function add_option() is only used in server responses to lease query packets. Each lease query response calls this function for several options, so eventually, the reference counters could overflow and cause the server to abort.
This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 6.5, indicating it requires adjacent network access with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 3 products from isc, from debian, from fedoraproject organizations running these solutions should prioritize assessment and patching.
Reported in 2022, 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.
2022-10-07T05:15:08.677
2024-11-21T07:01:56.183
Modified
CVSSv3.1: 6.5 (MEDIUM)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | isc | dhcp | ≤ 4.4.3 | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Application | isc | dhcp | 4.1-esv | Yes |
| Operating System | debian | debian_linux | 10.0 | Yes |
| Operating System | fedoraproject | fedora | 35 | Yes |
| Operating System | fedoraproject | fedora | 36 | Yes |
| Operating System | fedoraproject | fedora | 37 | 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.