CVE-2020-25648 A flaw was found in the way NSS handled CCS (ChangeCipherSpec) messages in TLS 1.3.
High 7.5
Published
Updated
Check this codebase for CVE-2020-25648 and fix it if it is affected.
What it is: CVE-2020-25648 is a high-severity vulnerability in Fedoraproject Fedora, published on 20 Oct 2020.
Exploitation: There is no known exploitation of CVE-2020-25648 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-2020-25648/ (Markdown: https://insights.sbomify.com/CVE-2020-25648/index.md)
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2020-25648?
CVE-2020-25648 is a high-severity vulnerability in Fedoraproject Fedora, published on 20 Oct 2020.
Official description
A flaw was found in the way NSS handled CCS (ChangeCipherSpec) messages in TLS 1.3. This flaw allows a remote attacker to send multiple CCS messages, causing a denial of service for servers compiled with the NSS library. The highest threat from this vulnerability is to system availability. This flaw affects NSS versions before 3.58.
Weakness: CWE-770
Which versions are affected by CVE-2020-25648?
It affects 6 products.
Linux distribution packages (40)
nspr AlmaLinux:8 | All versions | 4.32.0-1.el8_4 |
nspr-devel AlmaLinux:8 | All versions | 4.32.0-1.el8_4 |
nss AlmaLinux:8 | All versions | 3.67.0-6.el8_4 |
nss-devel AlmaLinux:8 | All versions | 3.67.0-6.el8_4 |
nss-softokn AlmaLinux:8 | All versions | 3.67.0-6.el8_4 |
nss-softokn-devel AlmaLinux:8 | All versions | 3.67.0-6.el8_4 |
nss-softokn-freebl AlmaLinux:8 | All versions | 3.67.0-6.el8_4 |
nss-softokn-freebl-devel AlmaLinux:8 | All versions | 3.67.0-6.el8_4 |
nss-sysinit AlmaLinux:8 | All versions | 3.67.0-6.el8_4 |
nss-tools AlmaLinux:8 | All versions | 3.67.0-6.el8_4 |
nss-util AlmaLinux:8 | All versions | 3.67.0-6.el8_4 |
nss-util-devel AlmaLinux:8 | All versions | 3.67.0-6.el8_4 |
nss Red Hat:enterprise_linux:7::client | All versions | 0:3.53.1-7.el7_9 |
nss-debuginfo Red Hat:enterprise_linux:7::client | All versions | 0:3.53.1-7.el7_9 |
nss-devel Red Hat:enterprise_linux:7::client | All versions | 0:3.53.1-7.el7_9 |
nss-pkcs11-devel Red Hat:enterprise_linux:7::client | All versions | 0:3.53.1-7.el7_9 |
nss-sysinit Red Hat:enterprise_linux:7::client | All versions | 0:3.53.1-7.el7_9 |
nss-tools Red Hat:enterprise_linux:7::client | All versions | 0:3.53.1-7.el7_9 |
nss-debuginfo Red Hat:enterprise_linux:7::computenode | All versions | 0:3.53.1-7.el7_9 |
nss-devel Red Hat:enterprise_linux:7::computenode | All versions | 0:3.53.1-7.el7_9 |
nss-pkcs11-devel Red Hat:enterprise_linux:7::computenode | All versions | 0:3.53.1-7.el7_9 |
nss Red Hat:enterprise_linux:7::server | All versions | 0:3.53.1-7.el7_9 |
nss-debuginfo Red Hat:enterprise_linux:7::server | All versions | 0:3.53.1-7.el7_9 |
nss-devel Red Hat:enterprise_linux:7::server | All versions | 0:3.53.1-7.el7_9 |
nss-pkcs11-devel Red Hat:enterprise_linux:7::server | All versions | 0:3.53.1-7.el7_9 |
nss-sysinit Red Hat:enterprise_linux:7::server | All versions | 0:3.53.1-7.el7_9 |
nss-tools Red Hat:enterprise_linux:7::server | All versions | 0:3.53.1-7.el7_9 |
nss Red Hat:enterprise_linux:7::workstation | All versions | 0:3.53.1-7.el7_9 |
nss-debuginfo Red Hat:enterprise_linux:7::workstation | All versions | 0:3.53.1-7.el7_9 |
nss-devel Red Hat:enterprise_linux:7::workstation | All versions | 0:3.53.1-7.el7_9 |
nss-pkcs11-devel Red Hat:enterprise_linux:7::workstation | All versions | 0:3.53.1-7.el7_9 |
nss-sysinit Red Hat:enterprise_linux:7::workstation | All versions | 0:3.53.1-7.el7_9 |
nss-tools Red Hat:enterprise_linux:7::workstation | All versions | 0:3.53.1-7.el7_9 |
nspr Red Hat:enterprise_linux:8::appstream | All versions | 0:4.32.0-1.el8_4 |
nspr-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:4.32.0-1.el8_4 |
nspr-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 0:4.32.0-1.el8_4 |
nspr-devel Red Hat:enterprise_linux:8::appstream | All versions | 0:4.32.0-1.el8_4 |
nss Red Hat:enterprise_linux:8::appstream | All versions | 0:3.67.0-6.el8_4 |
nss-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:3.67.0-6.el8_4 |
nss-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 0:3.67.0-6.el8_4 |
Products include Fedoraproject Fedora, Mozilla Network Security Services, Oracle Communications Offline Mediation Controller, Oracle Communications Pricing Design Center, Oracle Jd Edwards Enterpriseone Tools, Redhat Enterprise Linux.
How do I fix CVE-2020-25648?
Upgrade to a fixed version.
Is CVE-2020-25648 being exploited?
There is no known exploitation of CVE-2020-25648 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as ALPINE-CVE-2020-25648, ALSA-2021:3572, CLSA-2025-1760106204, CLSA-2025-1760112150, DEBIAN-CVE-2020-25648, GHSA-43j5-76vw-pq2j and 5 more.