CVE-2023-28450 Denial of service in n/a
High 7.5
Published
Updated
Check this codebase for CVE-2023-28450 and fix it if it is affected.
What it is: CVE-2023-28450 is a high-severity denial of service vulnerability in n/a, published on 15 Mar 2023. 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-2023-28450 in the wild and no public exploit code.
Affected product: n/a. 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-2023-28450/ (Markdown: https://insights.sbomify.com/CVE-2023-28450/index.md)
Dnsmasq uses an excessive default EDNS.0 UDP packet size, potentially causing network fragmentation and denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-28450?
CVE-2023-28450 is a high-severity denial of service vulnerability in n/a, published on 15 Mar 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An issue was discovered in Dnsmasq before 2.90. The default maximum EDNS.0 UDP packet size was set to 4096 but should be 1232 because of DNS Flag Day 2020.
Which versions are affected by CVE-2023-28450?
It affects 1 product.
Linux distribution packages (30)
dnsmasq AlmaLinux:8 | All versions | 2.79-31.el8 |
dnsmasq-utils AlmaLinux:8 | All versions | 2.79-31.el8 |
dnsmasq AlmaLinux:9 | All versions | 2.85-14.el9 |
dnsmasq-utils AlmaLinux:9 | All versions | 2.85-14.el9 |
dnsmasq Red Hat:enterprise_linux:8::appstream | All versions | 0:2.79-31.el8 |
dnsmasq-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:2.79-31.el8 |
dnsmasq-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 0:2.79-31.el8 |
dnsmasq-utils Red Hat:enterprise_linux:8::appstream | All versions | 0:2.79-31.el8 |
dnsmasq-utils-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:2.79-31.el8 |
dnsmasq Red Hat:enterprise_linux:9::appstream | All versions | 0:2.85-14.el9 |
dnsmasq-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:2.85-14.el9 |
dnsmasq-debugsource Red Hat:enterprise_linux:9::appstream | All versions | 0:2.85-14.el9 |
dnsmasq-utils Red Hat:enterprise_linux:9::appstream | All versions | 0:2.85-14.el9 |
dnsmasq-utils-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:2.85-14.el9 |
dnsmasq Red Hat:rhel_eus:9.2::appstream | All versions | 0:2.85-6.el9_2.4 |
dnsmasq-debuginfo Red Hat:rhel_eus:9.2::appstream | All versions | 0:2.85-6.el9_2.4 |
dnsmasq-debugsource Red Hat:rhel_eus:9.2::appstream | All versions | 0:2.85-6.el9_2.4 |
dnsmasq-utils Red Hat:rhel_eus:9.2::appstream | All versions | 0:2.85-6.el9_2.4 |
dnsmasq-utils-debuginfo Red Hat:rhel_eus:9.2::appstream | All versions | 0:2.85-6.el9_2.4 |
dnsmasq SUSE:HPE Helion OpenStack 8 | All versions | 2.78-18.21.1 |
dnsmasq SUSE:Linux Enterprise Micro 5.1 | All versions | 2.86-150100.7.23.1 |
dnsmasq SUSE:Linux Enterprise Micro 5.2 | All versions | 2.86-150100.7.23.1 |
dnsmasq SUSE:Linux Enterprise Real Time 15 SP3 | All versions | 2.86-150100.7.23.1 |
dnsmasq SUSE:Linux Enterprise Server 12 SP5 | All versions | 2.78-18.21.1 |
dnsmasq SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 2.78-18.21.1 |
dnsmasq SUSE:OpenStack Cloud 8 | All versions | 2.78-18.21.1 |
dnsmasq SUSE:OpenStack Cloud 9 | All versions | 2.78-18.21.1 |
dnsmasq SUSE:OpenStack Cloud Crowbar 8 | All versions | 2.78-18.21.1 |
dnsmasq SUSE:OpenStack Cloud Crowbar 9 | All versions | 2.78-18.21.1 |
dnsmasq openSUSE:Tumbleweed | All versions | 2.89-3.1 |
Products include Thekelleys Dnsmasq.
How do I fix CVE-2023-28450?
Upgrade to a fixed version.
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-2023-28450 being exploited?
There is no known exploitation of CVE-2023-28450 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as ALPINE-CVE-2023-28450, ALSA-2023:6524, ALSA-2023:7046, AZL-25660, CLEANSTART-2026-XT23079, CLSA-2024-1720179161 and 12 more.