CVE-2018-5741 Update policies krb5-subdomain and ms-subdomain do not enforce controls promised in their documentation
Incorrect documentation of BIND update-policy rules may lead administrators to configure less restrictive DNS update permissions than intended.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-5741?
CVE-2018-5741 is a medium-severity missing authorization vulnerability in Isc Bind, published on 16 Jan 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
To provide fine-grained controls over the ability to use Dynamic DNS (DDNS) to update records in a zone, BIND 9 provides a feature called update-policy. Various rules can be configured to limit the types of updates that can be performed by a client, depending on the key used when sending the update request. Unfortunately, some rule types were not initially documented, and when documentation for them was added to the Administrator Reference Manual (ARM) in change #3112, the language that was added to the ARM at that time incorrectly described the behavior of two rule types, krb5-subdomain and ms-subdomain. This incorrect documentation could mislead operators into believing that policies they had configured were more restrictive than they actually were. This affects BIND versions prior to BIND 9.11.5 and BIND 9.12.3.
Weakness: CWE-863
Which versions are affected by CVE-2018-5741?
It affects 1 product.
Linux distribution packages (40)
bind Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
bind-chroot Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
bind-debuginfo Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
bind-devel Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
bind-export-devel Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
bind-export-libs Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
bind-libs Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
bind-libs-lite Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
bind-license Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
bind-lite-devel Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
bind-pkcs11 Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
bind-pkcs11-devel Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
bind-pkcs11-libs Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
bind-pkcs11-utils Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
bind-sdb Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
bind-sdb-chroot Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
bind-utils Red Hat:enterprise_linux:7::client | All versions | 32:9.11.4-9.P2.el7 |
bind Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
bind-chroot Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
bind-debuginfo Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
bind-devel Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
bind-export-devel Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
bind-export-libs Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
bind-libs Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
bind-libs-lite Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
bind-license Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
bind-lite-devel Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
bind-pkcs11 Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
bind-pkcs11-devel Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
bind-pkcs11-libs Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
bind-pkcs11-utils Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
bind-sdb Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
bind-sdb-chroot Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
bind-utils Red Hat:enterprise_linux:7::computenode | All versions | 32:9.11.4-9.P2.el7 |
bind Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-9.P2.el7 |
bind-chroot Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-9.P2.el7 |
bind-debuginfo Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-9.P2.el7 |
bind-devel Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-9.P2.el7 |
bind-export-devel Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-9.P2.el7 |
bind-export-libs Red Hat:enterprise_linux:7::server | All versions | 32:9.11.4-9.P2.el7 |
Products include Isc Bind.
How do I fix CVE-2018-5741?
Upgrade to a fixed version.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2018-5741 being exploited?
There is no known exploitation of CVE-2018-5741 in the wild and no public exploit code.
Other vulnerabilities in Isc Bind
Sources
Also known as ALPINE-CVE-2018-5741, CLSA-2022-1657560205, CLSA-2022-1657561196, DEBIAN-CVE-2018-5741, GHSA-ghpp-72v8-mpmv, RHSA-2019:2057 and 1 more.