CVE-2019-6471 A race condition when discarding malformed packets can cause BIND to exit with an assertion failure
Medium 5.9
Published
Updated
Check this codebase for CVE-2019-6471 and fix it if it is affected.
What it is: CVE-2019-6471 is a medium-severity vulnerability in F5 Big-Ip Access Policy Manager, published on 9 Oct 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2019-6471 in the wild and no public exploit code.
Affected product: F5 Big-Ip Access Policy Manager. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2019-6471/ (Markdown: https://insights.sbomify.com/CVE-2019-6471/index.md)
A race condition when discarding malformed packets causes BIND to exit, leading to denial of service for DNS services.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2019-6471?
CVE-2019-6471 is a medium-severity vulnerability in F5 Big-Ip Access Policy Manager, published on 9 Oct 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2019-6471?
It affects 17 products.
Linux distribution packages (40)
bind Red Hat:enterprise_linux:8::appstream | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-chroot Red Hat:enterprise_linux:8::appstream | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-devel Red Hat:enterprise_linux:8::appstream | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-export-libs-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-libs Red Hat:enterprise_linux:8::appstream | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-libs-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-libs-lite Red Hat:enterprise_linux:8::appstream | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-libs-lite-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-license Red Hat:enterprise_linux:8::appstream | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-lite-devel Red Hat:enterprise_linux:8::appstream | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-pkcs11 Red Hat:enterprise_linux:8::appstream | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-pkcs11-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-pkcs11-devel Red Hat:enterprise_linux:8::appstream | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-pkcs11-libs Red Hat:enterprise_linux:8::appstream | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-pkcs11-libs-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-pkcs11-utils Red Hat:enterprise_linux:8::appstream | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-pkcs11-utils-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-sdb Red Hat:enterprise_linux:8::appstream | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-sdb-chroot Red Hat:enterprise_linux:8::appstream | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-sdb-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-utils Red Hat:enterprise_linux:8::appstream | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-utils-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 32:9.11.4-17.P2.el8_0.1 |
python3-bind Red Hat:enterprise_linux:8::appstream | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind Red Hat:enterprise_linux:8::baseos | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-debugsource Red Hat:enterprise_linux:8::baseos | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-export-devel Red Hat:enterprise_linux:8::baseos | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-export-libs Red Hat:enterprise_linux:8::baseos | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-export-libs-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-libs-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-libs-lite-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-pkcs11-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-pkcs11-libs-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-pkcs11-utils-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-sdb-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind-utils-debuginfo Red Hat:enterprise_linux:8::baseos | All versions | 32:9.11.4-17.P2.el8_0.1 |
bind SUSE:Linux Enterprise Module for Basesystem 15 | All versions | 9.11.2-12.13.2 |
bind SUSE:Linux Enterprise Module for Basesystem 15 SP1 | All versions | 9.11.2-12.13.2 |
Products include F5 Big-Ip Access Policy Manager, F5 Big-Ip Advanced Firewall Manager, F5 Big-Ip Analytics, F5 Big-Ip Application Acceleration Manager, F5 Big-Ip Application Security Manager, F5 Big-Ip Domain Name System and 11 more.
How do I fix CVE-2019-6471?
Apply the vendor's patch.
Is CVE-2019-6471 being exploited?
There is no known exploitation of CVE-2019-6471 in the wild and no public exploit code.
Other vulnerabilities in F5 Big-Ip Access Policy Manager
- CVE-2023-46747 F5 BIG-IP Configuration Utility Authentication Bypass
- CVE-2022-1388 F5 BIG-IP Missing Authentication
- CVE-2021-22986 F5 BIG-IP and BIG-IQ Centralized Management iControl REST Remote Code Execution
- CVE-2021-22991 F5 BIG-IP Traffic Management Microkernel Buffer Overflow
- CVE-2020-5902 F5 BIG-IP Traffic Management User Interface (TMUI) Remote Code Execution
Sources
Also known as ALPINE-CVE-2019-6471, DEBIAN-CVE-2019-6471, GHSA-52fp-qxmc-8q94, RHSA-2019:1714, SUSE-SU-2019:2550-1, UBUNTU-CVE-2019-6471 and 3 more.