CVSS 3.1 Score 7.5 of 10 (high)


Published Feb 13, 2024
Updated: Mar 4, 2024


CVE-2023-5517 is a vulnerability that affects BIND 9, specifically versions 9.12.0 through 9.16.45, 9.18.0 through 9.18.21, and 9.19.0 through 9.19.19, as well as versions with the suffix "-S1." The flaw in the query-handling code of BIND can cause the named process to exit prematurely with an assertion failure in certain scenarios involving the configuration of `nxdomain-redirect <domain>;` and receiving a PTR query for an RFC 1918 address that should result in an authoritative NXDOMAIN response. The risk score for this vulnerability is rated as 26, with a base severity of HIGH and a base score of 7.5 according to the Common Vulnerability Scoring System (CVSS) version 3.1 analysis provided by [email protected]. The potential danger posed by this vulnerability is its impact on availability, and organizations using affected versions of BIND should remediate it by applying the necessary updates or patches provided by ISC (Internet Systems Consortium), which maintains BIND.

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