CVE-2021-34555 Null dereference in n/a
High 7.5
Published
Updated
Check this codebase for CVE-2021-34555 and fix it if it is affected.
What it is: CVE-2021-34555 is a high-severity vulnerability in Fedoraproject Fedora, published on 10 Jun 2021. 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-2021-34555 in the wild and no public exploit code.
Affected product: Fedoraproject Fedora. 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-2021-34555/ (Markdown: https://insights.sbomify.com/CVE-2021-34555/index.md)
Remote attackers can crash OpenDMARC via a multi-value From header, causing 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-2021-34555?
CVE-2021-34555 is a high-severity vulnerability in Fedoraproject Fedora, published on 10 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OpenDMARC 1.4.1 and 1.4.1.1 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a multi-value From header field.
Weakness: CWE-476
Which versions are affected by CVE-2021-34555?
It affects 2 products.
Products include Fedoraproject Fedora, Trusteddomain Opendmarc.
How do I fix CVE-2021-34555?
Upgrade to a fixed version.
Is CVE-2021-34555 being exploited?
There is no known exploitation of CVE-2021-34555 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as DEBIAN-CVE-2021-34555, GHSA-9774-4j5q-whvj.