CVE-2019-6471: A race condition when discarding malformed packets can cause BIND to exit with an assertion failure

Published Oct 9, 2019
·
Updated

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.

Affected Software

109 affected components
F5 Big-ip Local Traffic Manager>=11.5.2<=11.5.9
F5 Big-ip Local Traffic Manager>=11.6.1<=11.6.4
F5 Big-ip Local Traffic Manager>=12.1.0<=12.1.4
F5 Big-ip Local Traffic Manager>=13.1.0<=13.1.1
F5 Big-ip Local Traffic Manager=14.0.0
F5 Big-ip Local Traffic Manager=14.1.0
F5 Big-ip Local Traffic Manager=15.0.0
F5 Big-ip Application Acceleration Manager>=11.5.2<=11.5.9
F5 Big-ip Application Acceleration Manager>=11.6.1<=11.6.4
F5 Big-ip Application Acceleration Manager>=12.1.0<=12.1.4
F5 Big-ip Application Acceleration Manager>=13.1.0<=13.1.1
F5 Big-ip Application Acceleration Manager=14.0.0
F5 Big-ip Application Acceleration Manager=14.1.0
F5 Big-ip Application Acceleration Manager=15.0.0
F5 BIG-IP Advanced Firewall Manager>=11.5.2<=11.5.9
F5 BIG-IP Advanced Firewall Manager>=11.6.1<=11.6.4
F5 BIG-IP Advanced Firewall Manager>=12.1.0<=12.1.4
F5 BIG-IP Advanced Firewall Manager>=13.1.0<=13.1.1
F5 BIG-IP Advanced Firewall Manager=14.0.0
F5 BIG-IP Advanced Firewall Manager=14.1.0
F5 BIG-IP Advanced Firewall Manager=15.0.0
F5 BIG-IP Analytics>=11.5.2<=11.5.9
F5 BIG-IP Analytics>=11.6.1<=11.6.4
F5 BIG-IP Analytics>=12.1.0<=12.1.4
F5 BIG-IP Analytics>=13.1.0<=13.1.1
F5 BIG-IP Analytics=14.0.0
F5 BIG-IP Analytics=14.1.0
F5 BIG-IP Analytics=15.0.0
F5 BIG-IP Access Policy Manager>=11.5.2<=11.5.9
F5 BIG-IP Access Policy Manager>=11.6.1<=11.6.4
F5 BIG-IP Access Policy Manager>=12.1.0<=12.1.4
F5 BIG-IP Access Policy Manager>=13.1.0<=13.1.1
F5 BIG-IP Access Policy Manager=14.0.0
F5 BIG-IP Access Policy Manager=14.1.0
F5 BIG-IP Access Policy Manager=15.0.0
F5 BIG-IP Application Security Manager>=11.5.2<=11.5.9
F5 BIG-IP Application Security Manager>=11.6.1<=11.6.4
F5 BIG-IP Application Security Manager>=12.1.0<=12.1.4
F5 BIG-IP Application Security Manager>=13.1.0<=13.1.1
F5 BIG-IP Application Security Manager=14.0.0
F5 BIG-IP Application Security Manager=14.1.0
F5 BIG-IP Application Security Manager=15.0.0
F5 BIG-IP Edge Gateway>=11.5.2<=11.5.9
F5 BIG-IP Edge Gateway>=11.6.1<=11.6.4
F5 BIG-IP Edge Gateway>=12.1.0<=12.1.4
F5 BIG-IP Edge Gateway>=13.1.0<=13.1.1
F5 BIG-IP Edge Gateway=14.0.0
F5 BIG-IP Edge Gateway=14.1.0
F5 BIG-IP Edge Gateway=15.0.0
F5 Big-ip Fraud Protection Service>=11.5.2<=11.5.9
F5 Big-ip Fraud Protection Service>=11.6.1<=11.6.4
F5 Big-ip Fraud Protection Service>=12.1.0<=12.1.4
F5 Big-ip Fraud Protection Service>=13.1.0<=13.1.1
F5 Big-ip Fraud Protection Service=14.0.0
F5 Big-ip Fraud Protection Service=14.1.0
F5 Big-ip Fraud Protection Service=15.0.0
F5 Big-ip Global Traffic Manager>=11.5.2<=11.5.9
F5 Big-ip Global Traffic Manager>=11.6.1<=11.6.4
F5 Big-ip Global Traffic Manager>=12.1.0<=12.1.4
F5 Big-ip Global Traffic Manager>=13.1.0<=13.1.1
F5 Big-ip Global Traffic Manager=9.2.2
F5 Big-ip Global Traffic Manager=14.0.0
F5 Big-ip Global Traffic Manager=14.1.0
F5 Big-ip Global Traffic Manager=15.0.0
F5 Big-ip Link Controller>=11.5.2<=11.5.9
F5 Big-ip Link Controller>=11.6.1<=11.6.4
F5 Big-ip Link Controller>=12.1.0<=12.1.4
F5 Big-ip Link Controller>=13.1.0<=13.1.1
F5 Big-ip Link Controller=9.2.2
F5 Big-ip Link Controller=14.0.0
F5 Big-ip Link Controller=14.1.0
F5 Big-ip Link Controller=15.0.0
F5 Big-ip Webaccelerator>=11.5.2<=11.5.9
F5 Big-ip Webaccelerator>=11.6.1<=11.6.4
F5 Big-ip Webaccelerator>=12.1.0<=12.1.4
F5 Big-ip Webaccelerator>=13.1.0<=13.1.1
F5 Big-ip Webaccelerator=9.2.2
F5 Big-ip Webaccelerator=14.0.0
F5 Big-ip Webaccelerator=14.1.0
F5 Big-ip Webaccelerator=15.0.0
F5 Big-ip Policy Enforcement Manager>=11.5.2<=11.5.9
F5 Big-ip Policy Enforcement Manager>=11.6.1<=11.6.4
F5 Big-ip Policy Enforcement Manager>=12.1.0<=12.1.4
F5 Big-ip Policy Enforcement Manager>=13.1.0<=13.1.1
F5 Big-ip Policy Enforcement Manager=9.2.2
F5 Big-ip Policy Enforcement Manager=14.0.0
F5 Big-ip Policy Enforcement Manager=14.1.0
F5 Big-ip Policy Enforcement Manager=15.0.0
ISC BIND>=9.11.0<=9.11.7
ISC BIND>=9.12.0<=9.12.3
ISC BIND>=9.13.0<=9.13.7
ISC BIND>=9.14.0<=9.14.2
ISC BIND>=9.15.0<=9.15.5
ISC BIND=9.11.3-s1
ISC BIND=9.11.7-s1
ISC BIND=9.12.4
ISC BIND=9.12.4-p1
F5 Enterprise Manager=3.1.1
F5 BIG-IQ Centralized Management>=5.1.0<=5.4.0
F5 BIG-IQ Centralized Management>=6.0.0<=6.1.0
F5 iWorkflow=2.3.0
F5 Big-ip Domain Name System>=11.5.2<=11.5.9
F5 Big-ip Domain Name System>=11.6.1<=11.6.4
F5 Big-ip Domain Name System>=12.1.0<=12.1.4
F5 Big-ip Domain Name System>=13.1.0<=13.1.1
F5 Big-ip Domain Name System=9.2.2
F5 Big-ip Domain Name System=14.0.0
F5 Big-ip Domain Name System=14.1.0
F5 Big-ip Domain Name System=15.0.0

Remediation

Information

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

Event History

Oct 9, 2019
CVE Published
via MITRE·02:17 PM
Data Sourced
via MITRE·02:17 PM
RemedyDescriptionSeverityWeakness
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Frequently Asked Questions

1

What is the severity of CVE-2019-6471?

The severity of CVE-2019-6471 is high due to the potential for denial of service caused by a race condition in BIND.

2

How do I fix CVE-2019-6471?

To fix CVE-2019-6471, upgrade to the latest version of BIND that is not affected, specifically versions beyond 9.11.7, 9.12.4-P1, or 9.14.2.

3

What software does CVE-2019-6471 affect?

CVE-2019-6471 affects multiple versions of ISC BIND, as well as specific versions of F5 BIG-IP products.

4

Is there a workaround for CVE-2019-6471?

There is no official workaround for CVE-2019-6471; the recommended action is to apply the appropriate software update.

5

What happens if CVE-2019-6471 is exploited?

If CVE-2019-6471 is exploited, it can result in BIND exiting unexpectedly, causing denial of service.

Company

Resources

Contact

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