CVE-2020-13529: fedoraproject fedora Authentication Bypass by Spoofing
Vulnerability summary
CVE-2020-13529 is a medium (CVSS 6.1) Authentication Bypass by Spoofing vulnerability in fedoraproject fedora. EPSS estimates a 1.43% chance of exploitation in the next 30 days, higher than 73% of scored vulnerabilities. 1 public exploit is recorded.
Not severe (CVSS 6.1, adjacent network); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 7 · Related 6Timeline
- 10-05-2021PublishedVulnerability first disclosed.
- 14-10-2026Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
8 scores · 5 sources · 3 versions- OSV · UbuntuEcosystem advisory · calculated6.1MediumCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated6.1MediumCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
- NVDNIST6.1MediumCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated6.1MediumCVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
- NVDNIST6.1MediumCVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
EPSS trend
Probability
1.43%
Chance of exploitation in the next 30 days
Percentile
73%
Versus all other CVEs
30-day change
Increase +0.03 pp
From 1.40% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundExploit Reference (talosintelligence.com)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Known conditions: adjacent network, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Redhat27 products
- NetworkManager< 1:1.32.10-4.el8
- NetworkManager-adsl< 1:1.32.10-4.el8
- NetworkManager-adsl-debuginfo< 1:1.32.10-4.el8
- NetworkManager-bluetooth< 1:1.32.10-4.el8
- NetworkManager-bluetooth-debuginfo< 1:1.32.10-4.el8
Netapp2 products
Debian1 product
- systemd< 249.4-2
Fedoraproject1 product
- fedoraEOL33
Systemd_project1 product
- systemd245
Ubuntu1 product
- systemdAll versions (No fix recorded) | < 229-4ubuntu21.31+esm1 | < 237-3ubuntu10.49 | < 245.4-4ubuntu3.10
6 vendors · 33 products
References
60 links- talosintelligence.com/vulnerability_reports/TALOS-2020-1142X Refsource MISCREPORTExploitThird Party Advisory
