medium
5.9
CWE
362 617
Advisory Published
Updated

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

First published: Wed Oct 09 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.

Credit: security-officer@isc.org

Affected SoftwareAffected VersionHow to fix
Riverbed SteelApp Traffic Manager>=11.5.2<=11.5.9
Riverbed SteelApp Traffic Manager>=11.6.1<=11.6.4
Riverbed SteelApp Traffic Manager>=12.1.0<=12.1.4
Riverbed SteelApp Traffic Manager>=13.1.0<=13.1.1
Riverbed SteelApp Traffic Manager=14.0.0
Riverbed SteelApp Traffic Manager=14.1.0
Riverbed SteelApp 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 Access Policy Manager>=11.5.2<=11.5.9
F5 Access Policy Manager>=11.6.1<=11.6.4
F5 Access Policy Manager>=12.1.0<=12.1.4
F5 Access Policy Manager>=13.1.0<=13.1.1
F5 Access Policy Manager=14.0.0
F5 Access Policy Manager=14.1.0
F5 Access Policy Manager=15.0.0
F5 Application Security Manager>=11.5.2<=11.5.9
F5 Application Security Manager>=11.6.1<=11.6.4
F5 Application Security Manager>=12.1.0<=12.1.4
F5 Application Security Manager>=13.1.0<=13.1.1
F5 Application Security Manager=14.0.0
F5 Application Security Manager=14.1.0
F5 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
Riverbed SteelApp Traffic Manager>=11.5.2<=11.5.9
Riverbed SteelApp Traffic Manager>=11.6.1<=11.6.4
Riverbed SteelApp Traffic Manager>=12.1.0<=12.1.4
Riverbed SteelApp Traffic Manager>=13.1.0<=13.1.1
Riverbed SteelApp Traffic Manager=9.2.2
Riverbed SteelApp Traffic Manager=14.0.0
Riverbed SteelApp Traffic Manager=14.1.0
Riverbed SteelApp 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>=9.11.0<=9.11.7
ISC BIND 9>=9.12.0<=9.12.3
ISC BIND 9>=9.13.0<=9.13.7
ISC BIND 9>=9.14.0<=9.14.2
ISC BIND 9>=9.15.0<=9.15.5
ISC BIND 9=9.11.3-s1
ISC BIND 9=9.11.7-s1
ISC BIND 9=9.12.4
ISC BIND 9=9.12.4-p1
F5 Enterprise Manager=3.1.1
F5 BIG-IP and BIG-IQ Centralized Management>=5.1.0<=5.4.0
F5 BIG-IP and BIG-IQ Centralized Management>=6.0.0<=6.1.0
F5 iWorkflow=2.3.0
F5 BIG-IP>=11.5.2<=11.5.9
F5 BIG-IP>=11.6.1<=11.6.4
F5 BIG-IP>=12.1.0<=12.1.4
F5 BIG-IP>=13.1.0<=13.1.1
F5 BIG-IP=9.2.2
F5 BIG-IP=14.0.0
F5 BIG-IP=14.1.0
F5 BIG-IP=15.0.0

Remedy

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

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Reference Links

Frequently Asked Questions

  • 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.

  • 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.

  • 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.

  • 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.

  • 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.

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