CVE catalog
CVE-2020-25648
nss: CVE-2020-25648
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 3.90% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | nss | sid | 2:3.131.1-1 | fixed |
| Debian | nss | forky | 2:3.131.1-1 | fixed |
| Debian | nss | trixie | 2:3.110-1+deb13u4 | fixed |
| Debian | nss | trixie-security | 2:3.110-1+deb13u4 | fixed |
| Debian | nss | bookworm | 2:3.87.1-1+deb12u2 | fixed |
| Debian | nss | bookworm-security | 2:3.87.1-1+deb12u4 | fixed |
| Alpine | nss | 3.12 | 3.58-r0 | fixed |
| Alpine | nss | 3.19 | 3.58-r0 | fixed |
| Alpine | nss | 3.20 | 3.58-r0 | fixed |
| Alpine | nss | 3.21 | 3.58-r0 | fixed |
| Alpine | nss | 3.22 | 3.58-r0 | fixed |
| Alpine | nss | 3.23 | 3.58-r0 | fixed |
| Alpine | nss | 3.24 | 3.58-r0 | fixed |
| Ubuntu | nss | 18.04 | 2:3.32-1ubuntu3 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.34-1ubuntu1 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2.1 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2.2 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2.3 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2.5 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2.6 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2.7 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2.8 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2.9 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2.11 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2.12 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2.13 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2.14 | fixed |
| Ubuntu | nss | 20.04 | 2:3.45-1ubuntu2 | vulnerable |
| Ubuntu | nss | 20.04 | 2:3.47-1ubuntu1 | vulnerable |
| Ubuntu | nss | 20.04 | 2:3.47-1ubuntu2 | vulnerable |
| Ubuntu | nss | 20.04 | 2:3.48-1ubuntu1 | vulnerable |
| Ubuntu | nss | 20.04 | 2:3.49.1-1ubuntu1 | vulnerable |
| Ubuntu | nss | 20.04 | 2:3.49.1-1ubuntu1.1 | vulnerable |
| Ubuntu | nss | 20.04 | 2:3.49.1-1ubuntu1.2 | vulnerable |
| Ubuntu | nss | 20.04 | 2:3.49.1-1ubuntu1.4 | vulnerable |
| Ubuntu | nss | 20.04 | 2:3.49.1-1ubuntu1.5 | vulnerable |
| Ubuntu | nss | 20.04 | 2:3.49.1-1ubuntu1.6 | vulnerable |
| Ubuntu | nss | 20.04 | 2:3.49.1-1ubuntu1.7 | fixed |
| Ubuntu | nss | 18.04 | 2:3.32-1ubuntu3 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.34-1ubuntu1 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2.1 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2.2 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2.3 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2.5 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2.6 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2.7 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2.8 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2.9 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2.11 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2.12 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2.13 | vulnerable |
| Ubuntu | nss | 18.04 | 2:3.35-2ubuntu2.14 | fixed |
| Ubuntu | nss | 20.04 | 2:3.45-1ubuntu2 | vulnerable |
| Ubuntu | nss | 20.04 | 2:3.47-1ubuntu1 | vulnerable |
| Ubuntu | nss | 20.04 | 2:3.47-1ubuntu2 | vulnerable |
| Ubuntu | nss | 20.04 | 2:3.48-1ubuntu1 | vulnerable |
| Ubuntu | nss | 20.04 | 2:3.49.1-1ubuntu1 | vulnerable |
| Ubuntu | nss | 20.04 | 2:3.49.1-1ubuntu1.1 | vulnerable |
| Ubuntu | nss | 20.04 | 2:3.49.1-1ubuntu1.2 | vulnerable |
| Ubuntu | nss | 20.04 | 2:3.49.1-1ubuntu1.4 | vulnerable |
| Ubuntu | nss | 20.04 | 2:3.49.1-1ubuntu1.5 | vulnerable |
| Ubuntu | nss | 20.04 | 2:3.49.1-1ubuntu1.6 | vulnerable |
| Ubuntu | nss | 20.04 | 2:3.49.1-1ubuntu1.7 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | nss | source | sid | 2:3.58-1 | not yet assigned | Not reported | Not reported |
| Debian | nss | source | forky | 2:3.58-1 | not yet assigned | Not reported | Not reported |
| Debian | nss | source | trixie | 2:3.58-1 | not yet assigned | Not reported | Not reported |
| Debian | nss | source | bookworm | 2:3.58-1 | not yet assigned | Not reported | Not reported |
| Alpine | nss | apk | 3.12 | 3.58-r0 | Not reported | ALPINE-CVE-2020-25648 | Not reported |
| Alpine | nss | apk | 3.19 | 3.58-r0 | Not reported | ALPINE-CVE-2020-25648 | Not reported |
| Alpine | nss | apk | 3.20 | 3.58-r0 | Not reported | ALPINE-CVE-2020-25648 | Not reported |
| Alpine | nss | apk | 3.21 | 3.58-r0 | Not reported | ALPINE-CVE-2020-25648 | Not reported |
| Alpine | nss | apk | 3.22 | 3.58-r0 | Not reported | ALPINE-CVE-2020-25648 | Not reported |
| Alpine | nss | apk | 3.23 | 3.58-r0 | Not reported | ALPINE-CVE-2020-25648 | Not reported |
| Alpine | nss | apk | 3.24 | 3.58-r0 | Not reported | ALPINE-CVE-2020-25648 | Not reported |
| Ubuntu | nss | deb | 18.04 | 2:3.35-2ubuntu2.14 | Not reported | UBUNTU-CVE-2020-25648 | Not reported |
| Ubuntu | nss | deb | 20.04 | 2:3.49.1-1ubuntu1.7 | Not reported | UBUNTU-CVE-2020-25648 | Not reported |
| Ubuntu | nss | deb | 18.04 | 2:3.35-2ubuntu2.14 | Not reported | USN-5410-1 | Not reported |
| Ubuntu | nss | deb | 20.04 | 2:3.49.1-1ubuntu1.7 | Not reported | USN-5410-1 | Not reported |
OpenFactory catalog packages
Matching against OpenFactory catalog package versions is in progress.
[Debian 12 (Bookworm)]
- [libnss3]Unknown
Source package: [nss]
Details (4)
2:3.87.1-1+deb12u2· amd64 · bookwormFixed · Fixed:
2:3.58-1dsa · nss · debian · bookworm; dsa · nss · debian · 12
2:3.87.1-1+deb12u2· arm64 · bookwormFixed · Fixed:
2:3.58-1dsa · nss · debian · bookworm; dsa · nss · debian · 12
2:3.87.1-1+deb12u4· amd64 · bookworm-securityFixed · Fixed:
2:3.58-1dsa · nss · debian · bookworm; dsa · nss · debian · 12
2:3.87.1-1+deb12u4· arm64 · bookworm-securityFixed · Fixed:
2:3.58-1dsa · nss · debian · bookworm; dsa · nss · debian · 12
- [libnss3-dev]Unknown
Source package: [nss]
Details (4)
2:3.87.1-1+deb12u2· amd64 · bookwormFixed · Fixed:
2:3.58-1dsa · nss · debian · bookworm; dsa · nss · debian · 12
2:3.87.1-1+deb12u2· arm64 · bookwormFixed · Fixed:
2:3.58-1dsa · nss · debian · bookworm; dsa · nss · debian · 12
2:3.87.1-1+deb12u4· amd64 · bookworm-securityFixed · Fixed:
2:3.58-1dsa · nss · debian · bookworm; dsa · nss · debian · 12
2:3.87.1-1+deb12u4· arm64 · bookworm-securityFixed · Fixed:
2:3.58-1dsa · nss · debian · bookworm; dsa · nss · debian · 12
- [libnss3-tools]Unknown
Source package: [nss]
Details (4)
2:3.87.1-1+deb12u2· amd64 · bookwormFixed · Fixed:
2:3.58-1dsa · nss · debian · bookworm; dsa · nss · debian · 12
2:3.87.1-1+deb12u2· arm64 · bookwormFixed · Fixed:
2:3.58-1dsa · nss · debian · bookworm; dsa · nss · debian · 12
2:3.87.1-1+deb12u4· amd64 · bookworm-securityFixed · Fixed:
2:3.58-1dsa · nss · debian · bookworm; dsa · nss · debian · 12
2:3.87.1-1+deb12u4· arm64 · bookworm-securityFixed · Fixed:
2:3.58-1dsa · nss · debian · bookworm; dsa · nss · debian · 12
[Debian 13 (Trixie)]
- [libnss3]Unknown
Source package: [nss]
Details (4)
2:3.110-1+deb13u3· amd64 · trixieFixed · Fixed:
2:3.58-1dsa · nss · debian · 13
2:3.110-1+deb13u3· arm64 · trixieFixed · Fixed:
2:3.58-1dsa · nss · debian · 13
2:3.110-1+deb13u4· amd64 · trixie-securityFixed · Fixed:
2:3.58-1dsa · nss · debian · 13
2:3.110-1+deb13u4· arm64 · trixie-securityFixed · Fixed:
2:3.58-1dsa · nss · debian · 13
- [libnss3-dev]Unknown
Source package: [nss]
Details (4)
2:3.110-1+deb13u3· amd64 · trixieFixed · Fixed:
2:3.58-1dsa · nss · debian · 13
2:3.110-1+deb13u3· arm64 · trixieFixed · Fixed:
2:3.58-1dsa · nss · debian · 13
2:3.110-1+deb13u4· amd64 · trixie-securityFixed · Fixed:
2:3.58-1dsa · nss · debian · 13
2:3.110-1+deb13u4· arm64 · trixie-securityFixed · Fixed:
2:3.58-1dsa · nss · debian · 13
- [libnss3-tools]Unknown
Source package: [nss]
Details (4)
2:3.110-1+deb13u3· amd64 · trixieFixed · Fixed:
2:3.58-1dsa · nss · debian · 13
2:3.110-1+deb13u3· arm64 · trixieFixed · Fixed:
2:3.58-1dsa · nss · debian · 13
2:3.110-1+deb13u4· amd64 · trixie-securityFixed · Fixed:
2:3.58-1dsa · nss · debian · 13
2:3.110-1+deb13u4· arm64 · trixie-securityFixed · Fixed:
2:3.58-1dsa · nss · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2021_1384.json]
- [https://osv.dev/vulnerability/ALPINE-CVE-2020-25648]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2020-25648]
- [https://osv.dev/vulnerability/DLA-3634-1]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2020-25648]
- [https://osv.dev/vulnerability/USN-5410-1]
- [https://security-tracker.debian.org/tracker/CVE-2020-25648]
- [https://security.access.redhat.com/data/csaf/v2/vex/2020/cve-2020-25648.json]
[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]