Resource management error in ISC BIND - CVE-2020-8616

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Main Vulnerability Database Vulnerabilities #VU28121

Resource management error in ISC BIND - CVE-2020-8616

Published: May 20, 2020 / Updated: October 27, 2023


Vulnerability identifier: #VU28121
CSH Severity: High
CVSS v4: 8.7 [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]
CVE-ID: CVE-2020-8616
CWE-ID: CWE-399
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to improper management of internal resources with the applicatoin. In order for a server performing recursion to locate records in the DNS graph it must be capable of processing referrals, such as those received when it attempts to query an authoritative server for a record which is delegated elsewhere. A malicious actor who intentionally exploits this lack of effective limitation on the number of fetches performed when processing referrals can, through the use of specially crafted referrals, cause a recursing server to issue a very large number of fetches in an attempt to process the referral.


Affected software

ISC BIND
Arch Linux
Amazon Linux AMI
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for Power 9
Red Hat Enterprise Linux for IBM System z (Structure A)
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Anolis OS
IBM AIX
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, big endian - Extended Update Support
Red Hat Enterprise Linux EUS Compute Node
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Slackware Linux
Opensuse
Junos OS
Fedora
IBM VIOS
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
bind9 (Debian package)
bind9 (Ubuntu package)
bind (Alpine package)
bind (Red Hat package) main
dnsperf
bind
bind-chroot
bind-devel
bind-export-devel
bind-export-libs
bind-libs
bind-libs-lite
bind-lite-devel
bind-pkcs11
bind-pkcs11-devel
bind-pkcs11-libs
bind-pkcs11-utils
bind-sdb
bind-sdb-chroot
bind-utils
bind-license
python3-bind
bind-dyndb-ldap
Data Computing Appliance (DCA)
Red Hat OpenShift Container Platform
Juniper Junos Space

How to mitigate CVE-2020-8616

Install updates from vendor's website.

ISC BIND - addressed in versions 9.11.19, 9.11.19-S1, 9.14.12, 9.16.3
bind9 (Debian package) - addressed in versions 1:9.10.3.dfsg.P4-12.3+deb9u6, 1:9.11.5.P4+dfsg-5.1+deb10u1
bind9 (Ubuntu package) - addressed in versions 1:9.8.1.dfsg.P1-4ubuntu0.30, 1:9.9.5.dfsg-3ubuntu0.19+esm2, 1:9.10.3.dfsg.P4-8ubuntu1.16, 1:9.11.3+dfsg-1ubuntu1.12, 1:9.11.5.P4+dfsg-5.1ubuntu2.2, 1:9.16.1-0ubuntu2.1
bind (Alpine package) - update to 9.14.12-r0
bind (Red Hat package) main - addressed in versions 9.8.2-0.23.rc1.el6_5.9, 9.8.2-0.30.rc1.el6_6.11, 9.8.2-0.68.rc1.el6_10.7, 9.9.4-29.el7_2.9, 9.9.4-50.el7_3.4, 9.9.4-51.el7_4.4, 9.9.4-74.el7_6.4, 9.11.4-9.P2.el7_7.2, 9.11.4-16.P2.el7_8.6, 9.11.4-19.P2.el8_0, 9.11.4-26.P2.el8_1.3, 9.11.13-5.el8_2
Junos OS - addressed in versions 15.1X49-D240, 17.4R3-S4, 18.1R3-S12, 18.2R2-S8, 18.2R3-S7, 18.3R3-S4, 18.4R1-S8, 18.4R2-S6, 18.4R3-S6, 19.1R1-S6, 19.1R2-S2, 19.1R3-S3, 19.2R1-S6, 19.2R3-S1, 19.3R2-S5, 19.3R3, 19.4R2-S2, 19.4R3, 20.1R2, 20.2R1-S2, 20.2R2, 20.3R1
dnsperf - update to 2.3.4-1.fc31
Data Computing Appliance (DCA) - update to 4.3.0.0
Red Hat OpenShift Container Platform - update to 4.3.25
bind - addressed in versions 9.11.4-26.P2, 9.11.36-3
bind-chroot - addressed in versions 9.11.4-26.P2, 9.11.36-3
bind-devel - addressed in versions 9.11.4-26.P2, 9.11.36-3
bind-export-devel - addressed in versions 9.11.4-26.P2, 9.11.36-3
bind-export-libs - addressed in versions 9.11.4-26.P2, 9.11.36-3
bind-libs - addressed in versions 9.11.4-26.P2, 9.11.36-3
bind-libs-lite - addressed in versions 9.11.4-26.P2, 9.11.36-3
bind-lite-devel - addressed in versions 9.11.4-26.P2, 9.11.36-3
bind-pkcs11 - addressed in versions 9.11.4-26.P2, 9.11.36-3
bind-pkcs11-devel - addressed in versions 9.11.4-26.P2, 9.11.36-3
bind-pkcs11-libs - addressed in versions 9.11.4-26.P2, 9.11.36-3
bind-pkcs11-utils - addressed in versions 9.11.4-26.P2, 9.11.36-3
bind-sdb - addressed in versions 9.11.4-26.P2, 9.11.36-3
bind-sdb-chroot - addressed in versions 9.11.4-26.P2, 9.11.36-3
bind-utils - addressed in versions 9.11.4-26.P2, 9.11.36-3
bind-license - addressed in versions 9.11.4-26.P2, 9.11.36-3
bind - addressed in versions 9.11.19-1.fc31, 9.11.19-1.fc32
python3-bind - update to 9.11.36-3
bind-dyndb-ldap - update to 11.2-3.fc31
Juniper Junos Space - update to 20.3R1

External References

Related Security Bulletins