QID 15158

Date Published: 2024-03-11

QID 15158: ISC BIND Security Update (CVE-2023-5517)

ISC BIND (Berkley Internet Domain Name) is an implementation of DNS protocols.

CVE-2023-5517: 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.

Affected versions:
BIND 9.12.0 to 9.16.45
BIND 9.18.0 to 9.18.21
BIND 9.19.0 to 9.19.19
BIND Supported Preview Edition 9.16.8-S1 to 9.16.45-S1
BIND Supported Preview Edition 9.18.11-S1 to 9.18.21-S1

Patched Versions:
BIND 9.16.48
BIND 9.18.24
BIND 9.19.21
BIND Supported Preview Edition 9.16.48-S1
BIND Supported Preview Edition 9.18.24-S1

QID Detection Logic:
This unauthenticated check detects vulnerable systems by fetching the version information from the BIND service using the banner.

Note: This QID has been marked as potential as this vulnerability has a workaround, that cannot be detected through unauthenticated detection.

Successful exploitation of this vulnerability may compromise Confidentiality, Integrity, and Availability of data.

  • CVSS V3 rated as High - 7.5 severity.
  • CVSS V2 rated as High - 7.8 severity.
    • Solution
    Customers are advised to upgrade to the patched version latest release of CVE-2023-5517
    Workaround:
    Disabling the nxdomain-redirect feature makes the faulty code path impossible to reach, preventing this flaw from being exploitable.
    Vendor References

    CVEs related to QID 15158

    CVE-2023-5517 |
    Software Advisories
    Advisory ID Software Component Link
    CVE-2023-5517 URL Logo kb.isc.org/docs/cve-2023-5517
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