CVE-2021-4076 Information disclosure in tang
High 7.5
Published
Updated
Check this codebase for CVE-2021-4076 and fix it if it is affected.
What it is: CVE-2021-4076 is a high-severity vulnerability in tang, published on 2 Mar 2022. 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-2021-4076 in the wild and no public exploit code.
Affected product: tang. 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-2021-4076/ (Markdown: https://insights.sbomify.com/CVE-2021-4076/index.md)
A flaw in the tang server allows attackers to leak private keys, compromising cryptographic security.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-4076?
CVE-2021-4076 is a high-severity vulnerability in tang, published on 2 Mar 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw exists in tang, a network-based cryptographic binding server, which could result in leak of private keys.
Weakness: CWE-200
Which versions are affected by CVE-2021-4076?
It affects 1 product.
Products include Tang Project Tang.
How do I fix CVE-2021-4076?
Apply the vendor's patch.
Is CVE-2021-4076 being exploited?
There is no known exploitation of CVE-2021-4076 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2021-4076, DSA-5025-1, GHSA-83f4-c2vq-g2p3.