CVE-2018-5740 A flaw in the "deny-answer-aliases" feature can cause an assertion failure in named
A flaw in the deny-answer-aliases feature causes an assertion failure in named, leading to denial of service when this non-default feature is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-5740?
CVE-2018-5740 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 16 Jan 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
"deny-answer-aliases" is a little-used feature intended to help recursive server operators protect end users against DNS rebinding attacks, a potential method of circumventing the security model used by client browsers. However, a defect in this feature makes it easy, when the feature is in use, to experience an assertion failure in name.c. Affects BIND 9.7.0->9.8.8, 9.9.0->9.9.13, 9.10.0->9.10.8, 9.11.0->9.11.4, 9.12.0->9.12.2, 9.13.0->9.13.2.
Weakness: CWE-617
Which versions are affected by CVE-2018-5740?
It affects 11 products.
Linux distribution packages (40)
bind Red Hat:enterprise_linux:6::client | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind-chroot Red Hat:enterprise_linux:6::client | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind-debuginfo Red Hat:enterprise_linux:6::client | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind-devel Red Hat:enterprise_linux:6::client | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind-libs Red Hat:enterprise_linux:6::client | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind-sdb Red Hat:enterprise_linux:6::client | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind-utils Red Hat:enterprise_linux:6::client | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind Red Hat:enterprise_linux:6::computenode | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind-chroot Red Hat:enterprise_linux:6::computenode | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind-debuginfo Red Hat:enterprise_linux:6::computenode | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind-devel Red Hat:enterprise_linux:6::computenode | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind-libs Red Hat:enterprise_linux:6::computenode | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind-sdb Red Hat:enterprise_linux:6::computenode | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind-utils Red Hat:enterprise_linux:6::computenode | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind Red Hat:enterprise_linux:6::server | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind-chroot Red Hat:enterprise_linux:6::server | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind-debuginfo Red Hat:enterprise_linux:6::server | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind-devel Red Hat:enterprise_linux:6::server | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind-libs Red Hat:enterprise_linux:6::server | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind-sdb Red Hat:enterprise_linux:6::server | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind-utils Red Hat:enterprise_linux:6::server | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind Red Hat:enterprise_linux:6::workstation | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind-chroot Red Hat:enterprise_linux:6::workstation | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind-debuginfo Red Hat:enterprise_linux:6::workstation | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind-devel Red Hat:enterprise_linux:6::workstation | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind-libs Red Hat:enterprise_linux:6::workstation | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind-sdb Red Hat:enterprise_linux:6::workstation | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind-utils Red Hat:enterprise_linux:6::workstation | All versions | 32:9.8.2-0.68.rc1.el6_10.1 |
bind Red Hat:enterprise_linux:7::client | All versions | 32:9.9.4-61.el7_5.1 |
bind-chroot Red Hat:enterprise_linux:7::client | All versions | 32:9.9.4-61.el7_5.1 |
bind-debuginfo Red Hat:enterprise_linux:7::client | All versions | 32:9.9.4-61.el7_5.1 |
bind-devel Red Hat:enterprise_linux:7::client | All versions | 32:9.9.4-61.el7_5.1 |
bind-libs Red Hat:enterprise_linux:7::client | All versions | 32:9.9.4-61.el7_5.1 |
bind-libs-lite Red Hat:enterprise_linux:7::client | All versions | 32:9.9.4-61.el7_5.1 |
bind-license Red Hat:enterprise_linux:7::client | All versions | 32:9.9.4-61.el7_5.1 |
bind-lite-devel Red Hat:enterprise_linux:7::client | All versions | 32:9.9.4-61.el7_5.1 |
bind-pkcs11 Red Hat:enterprise_linux:7::client | All versions | 32:9.9.4-61.el7_5.1 |
bind-pkcs11-devel Red Hat:enterprise_linux:7::client | All versions | 32:9.9.4-61.el7_5.1 |
bind-pkcs11-libs Red Hat:enterprise_linux:7::client | All versions | 32:9.9.4-61.el7_5.1 |
bind-pkcs11-utils Red Hat:enterprise_linux:7::client | All versions | 32:9.9.4-61.el7_5.1 |
Products include Canonical Ubuntu Linux, Debian Debian Linux, Hp Hp-Ux, Isc Bind, Netapp Data Ontap Edge, Opensuse Leap and 5 more.
How do I fix CVE-2018-5740?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2018-5740 being exploited?
There is no known exploitation of CVE-2018-5740 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as ALPINE-CVE-2018-5740, DEBIAN-CVE-2018-5740, DLA-1485-1, GHSA-rqpc-6vjv-w22p, MGASA-2018-0353, RHSA-2018:2570 and 3 more.