What is the CVSS score of CVE-2023-4236?

CVE-2023-4236 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 2.1%.

Bind CVE-2023-4236

HIGH

Reachable Assertion (CWE-617)

2023-09-20 security-officer@isc.org

Denial Of Service Bind Fedora Debian Linux H300s Firmware H500s Firmware H700s Firmware H410s Firmware H410c Firmware

7.5

CVSS 3.1 · Vendor: isc

Severity by source

Vendor (isc) PRIMARY

7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from Vendor (isc) · only source for this CVE.

CVSS VectorVendor: isc

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Lifecycle Timeline

CVE Published

Sep 20, 2023 - 13:15 cve.org

HIGH 7.5

DescriptionCVE.org

A flaw in the networking code handling DNS-over-TLS queries may cause named to terminate unexpectedly due to an assertion failure. This happens when internal data structures are incorrectly reused under significant DNS-over-TLS query load. This issue affects BIND 9 versions 9.18.0 through 9.18.18 and 9.18.11-S1 through 9.18.18-S1.

AnalysisAI

A flaw in the networking code handling DNS-over-TLS queries may cause named to terminate unexpectedly due to an assertion failure. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-617. A flaw in the networking code handling DNS-over-TLS queries may cause named to terminate unexpectedly due to an assertion failure. This happens when internal data structures are incorrectly reused under significant DNS-over-TLS query load.18.0 through 9.18.18 and 9.18.11-S1 through 9.18.18-S1. Affected products include: Isc Bind, Fedoraproject Fedora, Debian Debian Linux, Netapp H300S Firmware, Netapp H500S Firmware. Version information: through 9.18.18.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.