Race condition in ISC BIND - CVE-2019-6471

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Main Vulnerability Database Vulnerabilities #VU21568

Race condition in ISC BIND - CVE-2019-6471

Published: October 7, 2019


Vulnerability identifier: #VU21568
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-6471
CWE-ID: CWE-362
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: ISC
Affected software:
ISC BIND

Detailed vulnerability description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a race condition when processing DNS requests in dispatch.c. A remote attacker can send specially crafted DNS packets to the affected daemon, trigger a REQUIRE assertion failure and crash the DNS server.

How to mitigate CVE-2019-6471

Install updates from vendor's website.

Sources