Vulnerability in Isc Bind
CVE-2023-4408
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.
EPSS: 0.013 (68.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Isc Bind — versions 9.9.3, 9.16.8, 9.16.11
- Isc Bind 9 — versions 9.0.0, 9.18.0, 9.19.0
- Netapp Ontap — versions 9.14.1, 9.15.1
- Fedoraproject Fedora — versions 38, 39
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-officer@isc.org (vendor-advisory, Vendor Advisory)
- security-officer@isc.org (Mailing List, Third Party Advisory)
- security-officer@isc.org (Mailing List, Third Party Advisory)
- security-officer@isc.org (Mailing List, Third Party Advisory)
- security-officer@isc.org (Mailing List, Third Party Advisory)
- security-officer@isc.org (Mailing List, Third Party Advisory)
- security-officer@isc.org (Third Party Advisory)
Frequently asked questions
- What is CVE-2023-4408?
- CVE-2023-4408 is a high-severity vulnerability in Isc Bind, classified under Inefficient Algorithmic Complexity. CVSS score: 7.5/10. Published 2024-02-13.
- How severe is CVE-2023-4408?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2023-4408 known to be exploited?
- 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.