CVE catalog
CVE-2021-25740
kubernetes: CVE-2021-25740
- Severity
- Low · CVSS 3.1
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 1.95% · Oct 25, 2026
A security issue was discovered with Kubernetes that could enable users to send network traffic to locations they would otherwise not have access to via a confused deputy attack.
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 | kubernetes | sid | 1.36.4+ds-1 | fixed |
| Debian | kubernetes | forky | 1.36.4+ds-1 | fixed |
| Debian | kubernetes | trixie | 1.32.3+ds-2 | fixed |
| Debian | kubernetes | bookworm | 1.20.5+really1.20.2-1.1+deb12u1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | kubernetes | source | sid | 1.20.5+really1.20.2-1 | not yet assigned | Not reported | Not reported |
| Debian | kubernetes | source | forky | 1.20.5+really1.20.2-1 | not yet assigned | Not reported | Not reported |
| Debian | kubernetes | source | trixie | 1.20.5+really1.20.2-1 | not yet assigned | Not reported | Not reported |
| Debian | kubernetes | source | bookworm | 1.20.5+really1.20.2-1 | not yet assigned | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [kubernetes-client]Fixed
Source package: [kubernetes]
Details (2)
1.20.5+really1.20.2-1.1+deb12u1· amd64 · bookwormFixed · Fixed:
1.20.5+really1.20.2-1dsa · kubernetes · debian · bookworm; dsa · kubernetes · debian · 12
1.20.5+really1.20.2-1.1+deb12u1· arm64 · bookwormFixed · Fixed:
1.20.5+really1.20.2-1dsa · kubernetes · debian · bookworm; dsa · kubernetes · debian · 12
[Debian 13 (Trixie)]
- [golang-k8s-kubectl-dev]Fixed
Source package: [kubernetes]
Details (2)
1.32.3+ds-2· all · trixieFixed · Fixed:
1.20.5+really1.20.2-1dsa · kubernetes · debian · 13
1.32.3+ds-2· all · trixieFixed · Fixed:
1.20.5+really1.20.2-1dsa · kubernetes · debian · 13
- [kubectl]Fixed
Source package: [kubernetes]
Details (2)
1.32.3+ds-2· amd64 · trixieFixed · Fixed:
1.20.5+really1.20.2-1dsa · kubernetes · debian · 13
1.32.3+ds-2· arm64 · trixieFixed · Fixed:
1.20.5+really1.20.2-1dsa · kubernetes · debian · 13
- [kubernetes-client]Fixed
Source package: [kubernetes]
Details (2)
1.32.3+ds-2· amd64 · trixieFixed · Fixed:
1.20.5+really1.20.2-1dsa · kubernetes · debian · 13
1.32.3+ds-2· arm64 · trixieFixed · Fixed:
1.20.5+really1.20.2-1dsa · kubernetes · debian · 13
Observed:
References
- [https://osv.dev/vulnerability/DEBIAN-CVE-2021-25740]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2021-25740]
- [https://security-tracker.debian.org/tracker/CVE-2021-25740]
- [https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-25740.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2021/wid-sec-w-2023-0019.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]