Authentication bypass by spoofing in Systemd
Priority LOW 30CWE-290Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Partial Red Hat: 3 fixed, 1 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-290.
Summary
An exploitable denial-of-service vulnerability exists in Systemd 245. A specially crafted DHCP FORCERENEW packet can cause a server running the DHCP client to be vulnerable to a DHCP ACK spoofing attack. An attacker can forge a pair of FORCERENEW and DCHP ACK packets to reconfigure the server.
Why it matters now
EPSS 0.01431 73rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 1 advisoryRed Hat: 3 fixed, 1 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Systemd | Canonical Ubuntu 20.04 LTS, Systemd 245 | — | No fix listed | CNA |
- Systemd Vendor— Affected Canonical Ubuntu 20.04 LTS, Systemd 245 Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:systemd_project:systemd:245:-:*:*:*:*:*:* | 245 | Vulnerable | systemd |
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | 33 | Vulnerable | Fedoraproject |
| cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vsphere:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
- cpe:2.3:a:systemd_project:systemd:245:-:*:*:*:*:*:* Versions 245 Vulnerable ·systemd
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
- cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vsphere:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
Remediation
Red Hat 1 advisory
- RHSA-2021:4361 Released 2021-11-09 · Red Hat rating ModerateNetworkManager security, bug fix, and enhancement update
- Red Hat CodeReady Linux Builder (v. 8) NetworkManager-libnm-devel-1:1.32.10-4.el8
- Red Hat Enterprise Linux AppStream (v. 8) NetworkManager-cloud-setup-1:1.32.10-4.el8
- Red Hat Enterprise Linux BaseOS (v. 8) NetworkManager-1:1.32.10-4.el8, NetworkManager-adsl-1:1.32.10-4.el8, NetworkManager-bluetooth-1:1.32.10-4.el8 +10
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat CodeReady Linux Builder (v. 8) | Fixed | RHSA-2021:4361 |
| Red Hat Enterprise Linux AppStream (v. 8) | Fixed | RHSA-2021:4361 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2021:4361 |
Not affected: 2 products
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2020-13529
- 2026-10-03 Alias added: GHSA-44p7-qpr4-rgvf
References
Advisory 6
Sources
- CVE-2020-13529 · CVE Program
- CVE-2020-13529 · NVD
- FIRST EPSS
- GHSA-44p7-qpr4-rgvf · GitHub Advisory Database · CC BY 4.0
- CVE-2020-13529 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences