CVE-2019-6471

A race condition when discarding malformed packets can cause BIND to exit with an assertion failure

Description

A race condition which may occur when discarding malformed packets can result in BIND exiting due to a REQUIRE assertion failure in dispatch.c. Versions affected: BIND 9.11.0 -> 9.11.7, 9.12.0 -> 9.12.4-P1, 9.14.0 -> 9.14.2. Also all releases of the BIND 9.13 development branch and version 9.15.0 of the BIND 9.15 development branch and BIND Supported Preview Edition versions 9.11.3-S1 -> 9.11.7-S1.

Remediation

Solution:

  • Upgrade to the patched release most closely related to your current version of BIND: BIND 9.11.8 BIND 9.12.4-P2 BIND 9.14.3 BIND 9.15.1 BIND Supported Preview Edition is a special feature preview branch of BIND provided to eligible ISC support customers. BIND 9.11.8-S1

Category

5.9
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.64% Top 20%
Third-Party Advisory isc.org
Affected: ISC BIND 9
Published at:
Updated at:

References

Link Tags
https://kb.isc.org/docs/cve-2019-6471 third party advisory
https://support.f5.com/csp/article/K10092301?utm_source=f5support&%3Butm_medium=RSS

Frequently Asked Questions

What is the severity of CVE-2019-6471?
CVE-2019-6471 has been scored as a medium severity vulnerability.
How to fix CVE-2019-6471?
To fix CVE-2019-6471: Upgrade to the patched release most closely related to your current version of BIND: BIND 9.11.8 BIND 9.12.4-P2 BIND 9.14.3 BIND 9.15.1 BIND Supported Preview Edition is a special feature preview branch of BIND provided to eligible ISC support customers. BIND 9.11.8-S1
Is CVE-2019-6471 being actively exploited in the wild?
It is possible that CVE-2019-6471 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-6471?
CVE-2019-6471 affects ISC BIND 9.
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