high
7.5
CWE
770
Advisory Published
Updated

CVE-2018-5743: Limiting simultaneous TCP clients was ineffective

First published: Wed Oct 09 2019(Updated: )

By design, BIND is intended to limit the number of TCP clients that can be connected at any given time. The number of allowed connections is a tunable parameter which, if unset, defaults to a conservative value for most servers. Unfortunately, the code which was intended to limit the number of simultaneous connections contained an error which could be exploited to grow the number of simultaneous connections beyond this limit. Versions affected: BIND 9.9.0 -> 9.10.8-P1, 9.11.0 -> 9.11.6, 9.12.0 -> 9.12.4, 9.14.0. BIND 9 Supported Preview Edition versions 9.9.3-S1 -> 9.11.5-S3, and 9.11.5-S5. Versions 9.13.0 -> 9.13.7 of the 9.13 development branch are also affected. Versions prior to BIND 9.9.0 have not been evaluated for vulnerability to CVE-2018-5743.

Credit: security-officer@isc.org

Affected SoftwareAffected VersionHow to fix
F5 Big-ip Local Traffic Manager>=11.5.2<=11.6.5
F5 Big-ip Local Traffic Manager>=12.1.0<=12.1.4
F5 Big-ip Local Traffic Manager>=13.0.0<=13.1.1
F5 Big-ip Local Traffic Manager>=14.0.0<=14.1.0
F5 Big-ip Local Traffic Manager=15.0.0
F5 Big-ip Application Acceleration Manager>=11.5.2<=11.6.5
F5 Big-ip Application Acceleration Manager>=12.1.0<=12.1.4
F5 Big-ip Application Acceleration Manager>=13.0.0<=13.1.1
F5 Big-ip Application Acceleration Manager>=14.0.0<=14.1.0
F5 Big-ip Application Acceleration Manager=15.0.0
F5 BIG-IP Advanced Firewall Manager>=11.5.2<=11.6.5
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<=14.1.0
F5 BIG-IP Advanced Firewall Manager=15.0.0
F5 BIG-IP Analytics>=11.5.2<=11.6.5
F5 BIG-IP Analytics>=12.1.0<=12.1.4
F5 BIG-IP Analytics>=13.0.0<=13.1.1
F5 BIG-IP Analytics>=14.0.0<=14.1.0
F5 BIG-IP Analytics=15.0.0
F5 BIG-IP Access Policy Manager>=11.5.2<=11.6.5
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<=14.1.0
F5 BIG-IP Access Policy Manager=15.0.0
F5 BIG-IP Application Security Manager>=11.5.2<=11.6.5
F5 BIG-IP Application Security Manager>=12.1.0<=12.1.4
F5 BIG-IP Application Security Manager>=13.0.0<=13.1.1
F5 BIG-IP Application Security Manager>=14.0.0<=14.1.1
F5 BIG-IP Application Security Manager=15.0.0
F5 Big-ip Edge Gateway>=11.5.2<=11.6.5
F5 Big-ip Edge Gateway>=12.1.0<=12.1.4
F5 Big-ip Edge Gateway>=13.0.0<=13.1.1
F5 Big-ip Edge Gateway>=14.0.0<=14.1.0
F5 Big-ip Edge Gateway=15.0.0
F5 Big-ip Fraud Protection Service>=11.5.2<=11.6.5
F5 Big-ip Fraud Protection Service>=12.1.0<=12.1.4
F5 Big-ip Fraud Protection Service>=13.0.0<=13.1.1
F5 Big-ip Fraud Protection Service>=14.0.0<=14.1.0
F5 Big-ip Fraud Protection Service=15.0.0
F5 Big-ip Global Traffic Manager>=11.5.2<=11.6.5
F5 Big-ip Global Traffic Manager>=12.1.0<=12.1.4
F5 Big-ip Global Traffic Manager>=13.0.0<=13.1.1
F5 Big-ip Global Traffic Manager>=14.0.0<=14.1.0
F5 Big-ip Global Traffic Manager=15.0.0
F5 Big-ip Link Controller>=11.5.2<=11.6.5
F5 Big-ip Link Controller>=12.1.0<=12.1.4
F5 Big-ip Link Controller>=13.0.0<=13.1.1
F5 Big-ip Link Controller>=14.0.0<=14.1.0
F5 Big-ip Link Controller=15.0.0
F5 Big-ip Webaccelerator>=11.5.2<=11.6.5
F5 Big-ip Webaccelerator>=12.1.0<=12.1.4
F5 Big-ip Webaccelerator>=13.1.0<=13.1.1
F5 Big-ip Webaccelerator>=14.0.0<=14.1.0
F5 Big-ip Webaccelerator=15.0.0
F5 Big-ip Policy Enforcement Manager>=11.5.2<=11.6.5
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>=14.0.0<=14.1.0
F5 Big-ip Policy Enforcement Manager=15.0.0
ISC BIND>=9.9.0<=9.10.8
ISC BIND>=9.11.0<=9.11.6
ISC BIND>=9.12.0<=9.12.4
ISC BIND>=9.13.0<=9.13.7
ISC BIND=9.9.3-s1
ISC BIND=9.10.8-p1
ISC BIND=9.11.5-s3
ISC BIND=9.11.5-s5
ISC BIND=9.14.0
F5 Enterprise Manager=3.1.1
F5 BIG-IQ Centralized Management>=5.0.0<=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<=11.6.5
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>=14.0.0<=14.1.0
F5 Big-ip Domain Name System=15.0.0
debian/bind9
1:9.11.5.P4+dfsg-5.1+deb10u7
1:9.11.5.P4+dfsg-5.1+deb10u9
1:9.16.44-1~deb11u1
1:9.18.19-1~deb12u1
1:9.19.19-1

Remedy

Upgrade to a version of BIND containing a fix for the ineffective limits. + BIND 9.11.6-P1 + BIND 9.12.4-P1 + BIND 9.14.1 BIND Supported Preview Edition is a special feature preview branch of BIND provided to eligible ISC support customers. + BIND 9.11.5-S6 + BIND 9.11.6-S1

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