CVE-2020-13529

low-risk
Published 2021-05-10

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.

Do I need to act?

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0.08% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.1/10 Medium
ADJACENT_NETWORK / HIGH complexity

Affected Products (4)

Affected Vendors

Fedoraproject Netapp Systemd Project

References (14)

Mailing List http://www.openwall.com/lists/oss-security/2021/08/04/2
Mailing List http://www.openwall.com/lists/oss-security/2021/08/17/3
Mailing List http://www.openwall.com/lists/oss-security/2021/09/07/3
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...
Third Party Advisory https://security.gentoo.org/glsa/202107-48
Third Party Advisory https://security.netapp.com/advisory/ntap-20210625-0005/
Exploit https://talosintelligence.com/vulnerability_reports/TALOS-2020-1142
Mailing List http://www.openwall.com/lists/oss-security/2021/08/04/2
Mailing List http://www.openwall.com/lists/oss-security/2021/08/17/3
Mailing List http://www.openwall.com/lists/oss-security/2021/09/07/3
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...
Third Party Advisory https://security.gentoo.org/glsa/202107-48
Third Party Advisory https://security.netapp.com/advisory/ntap-20210625-0005/
Exploit https://talosintelligence.com/vulnerability_reports/TALOS-2020-1142
26
/ 100
low-risk
Severity 16/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 10/34 · Low