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CVE-2023-5517— Querying RFC 1918 reverse zones may cause an assertion failure when "nxdomain-redirect" is enabled

Quick assessment

Affected
ISC BIND 9
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ISC BIND是美国ISC公司的一套实现了DNS协议的开源软件。 ISC BIND 存在安全漏洞，该漏洞源于查询处理代码存在问题，可能会导致出现断言失败。

CVSS 7.5 · High EPSS 1.24% · P68

Possible ATT&CK Techniques 1 AI

T1499.002 · Service Exhaustion Flood
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I. Basic Information for CVE-2023-5517

Vulnerability Information
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Vulnerability Title
Querying RFC 1918 reverse zones may cause an assertion failure when "nxdomain-redirect" is enabled
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw in query-handling code can cause `named` to exit prematurely with an assertion failure when: - `nxdomain-redirect <domain>;` is configured, and - the resolver receives a PTR query for an RFC 1918 address that would normally result in an authoritative NXDOMAIN response. This issue affects BIND 9 versions 9.12.0 through 9.16.45, 9.18.0 through 9.18.21, 9.19.0 through 9.19.19, 9.16.8-S1 through 9.16.45-S1, and 9.18.11-S1 through 9.18.21-S1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
ISC BIND 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ISC BIND是美国ISC公司的一套实现了DNS协议的开源软件。 ISC BIND 存在安全漏洞，该漏洞源于查询处理代码存在问题，可能会导致出现断言失败。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ISC BIND 9 9.12.0 ~ 9.16.45 -

II. Public POCs for CVE-2023-5517

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III. Intelligence Information for CVE-2023-5517

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Mailing List Discussions for CVE-2023-5517 (5)

Other References for CVE-2023-5517 (1)

Same Patch Batch · ISC · 2024-02-13 · 5 CVEs total

CVE-2023-4408 7.5 HIGH Parsing large DNS messages may cause excessive CPU load
CVE-2023-5679 7.5 HIGH Enabling both DNS64 and serve-stale may cause an assertion failure during recursive resolu
CVE-2023-6516 7.5 HIGH Specific recursive query patterns may lead to an out-of-memory condition
CVE-2023-5680 5.3 MEDIUM Cleaning an ECS-enabled cache may cause excessive CPU load

IV. Related Vulnerabilities

Same product: BIND 9
Same vendor: ISC

V. Comments for CVE-2023-5517

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