CVE-2019-11727 A vulnerability exists where it possible to force Network Security Services (NSS) to sign CertificateVerify with PKCS#1 v1.5 signatures when
Medium 5.3
Published
Updated
Check this codebase for CVE-2019-11727 and fix it if it is affected.
What it is: CVE-2019-11727 is a medium-severity vulnerability in Mozilla Firefox, published on 23 Jul 2019.
Exploitation: There is no known exploitation of CVE-2019-11727 in the wild and no public exploit code.
Affected product: Mozilla Firefox. 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-2019-11727/ (Markdown: https://insights.sbomify.com/CVE-2019-11727/index.md)
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2019-11727?
CVE-2019-11727 is a medium-severity vulnerability in Mozilla Firefox, published on 23 Jul 2019.
Official description
A vulnerability exists where it possible to force Network Security Services (NSS) to sign CertificateVerify with PKCS#1 v1.5 signatures when those are the only ones advertised by server in CertificateRequest in TLS 1.3. PKCS#1 v1.5 signatures should not be used for TLS 1.3 messages. This vulnerability affects Firefox < 68.
Weakness: CWE-295
Which versions are affected by CVE-2019-11727?
It affects 1 product.
Products include Mozilla Firefox.
How do I fix CVE-2019-11727?
Upgrade to a fixed version.
Is CVE-2019-11727 being exploited?
There is no known exploitation of CVE-2019-11727 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as DEBIAN-CVE-2019-11727, GHSA-pwq5-w788-7w28, UBUNTU-CVE-2019-11727.