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NVD / CVE Program· CNA talos

CVE-2020-13529: An exploitable denial-of-service vulnerability exists in Systemd 245.

MediumCVSS 6.1 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 24/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.4% (FIRST EPSS); higher than 73.3% of all records.
  • Someone on the same network segment can trigger it. No account or password is required. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: NetworkManager-cloud-setup (AlmaLinux:8) 1:1.32.10-4.el8; NetworkManager-libnm-devel (AlmaLinux:8) 1:1.32.10-4.el8; systemd (Debian:12) 249.4-2.

Low priority for now. Upgrade to NetworkManager-cloud-setup (AlmaLinux:8) 1:1.32.10-4.el8; NetworkManager-libnm-devel (AlmaLinux:8) 1:1.32.10-4.el8; systemd (Debian:12) 249.4-2 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published
May 10, 2021
Updated
Oct 14, 2026
EPSS
1.4% · 73th percentile

Report tools

JSON

Action score

24

Monitor

Low priority for now.

CVSS
24 / 40 · 6.1 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.4%

CNA vs NVD score

NVD
6.1
CNA · talos
6.1
agree

CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
systemd projectsystemd
fedoraprojectfedora
netappactive iq unified manager
netappcloud backup

Versions reported by the vendor

Affected version ranges reported by the assigning authority (talos). Independent of NVD's CPE analysis and usually ahead of it.

  • n/a Systemd

    • Canonical Ubuntu 20.04 LTS, Systemd 245affected
Affected versions · NVD (4)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • fedoraproject fedora33
  • netapp active iq unified managerall versions
  • netapp cloud backupall versions
  • systemd project systemd245

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8NetworkManager-cloud-setupbefore 1:1.32.10-4.el81:1.32.10-4.el8
AlmaLinux:8NetworkManager-libnm-develbefore 1:1.32.10-4.el81:1.32.10-4.el8
Debian:12systemdbefore 249.4-2249.4-2
openSUSE:Leap 15.3systemdbefore 246.15-7.11.1246.15-7.11.1
openSUSE:TumbleweedNetworkManagerbefore 1.32.10-2.11.32.10-2.1
openSUSE:Tumbleweedsystemdbefore 249.4-2.2249.4-2.2
Red Hat:enterprise_linux:8::appstreamNetworkManager-adsl-debuginfobefore 1:1.32.10-4.el81:1.32.10-4.el8
Red Hat:enterprise_linux:8::appstreamNetworkManager-bluetooth-debuginfobefore 1:1.32.10-4.el81:1.32.10-4.el8
Red Hat:enterprise_linux:8::appstreamNetworkManager-cloud-setupbefore 1:1.32.10-4.el81:1.32.10-4.el8
Red Hat:enterprise_linux:8::appstreamNetworkManager-cloud-setup-debuginfobefore 1:1.32.10-4.el81:1.32.10-4.el8
Red Hat:enterprise_linux:8::appstreamNetworkManager-debuginfobefore 1:1.32.10-4.el81:1.32.10-4.el8
Red Hat:enterprise_linux:8::appstreamNetworkManager-debugsourcebefore 1:1.32.10-4.el81:1.32.10-4.el8
Red Hat:enterprise_linux:8::appstreamNetworkManager-libnm-debuginfobefore 1:1.32.10-4.el81:1.32.10-4.el8
Red Hat:enterprise_linux:8::appstreamNetworkManager-ovs-debuginfobefore 1:1.32.10-4.el81:1.32.10-4.el8
Red Hat:enterprise_linux:8::appstreamNetworkManager-ppp-debuginfobefore 1:1.32.10-4.el81:1.32.10-4.el8
Red Hat:enterprise_linux:8::appstreamNetworkManager-team-debuginfobefore 1:1.32.10-4.el81:1.32.10-4.el8
Red Hat:enterprise_linux:8::appstreamNetworkManager-tui-debuginfobefore 1:1.32.10-4.el81:1.32.10-4.el8
Red Hat:enterprise_linux:8::appstreamNetworkManager-wifi-debuginfobefore 1:1.32.10-4.el81:1.32.10-4.el8
Red Hat:enterprise_linux:8::appstreamNetworkManager-wwan-debuginfobefore 1:1.32.10-4.el81:1.32.10-4.el8
Red Hat:enterprise_linux:8::baseosNetworkManagerbefore 1:1.32.10-4.el81:1.32.10-4.el8
Red Hat:enterprise_linux:8::baseosNetworkManager-adslbefore 1:1.32.10-4.el81:1.32.10-4.el8
Red Hat:enterprise_linux:8::baseosNetworkManager-bluetoothbefore 1:1.32.10-4.el81:1.32.10-4.el8
Red Hat:enterprise_linux:8::baseosNetworkManager-config-connectivity-redhatbefore 1:1.32.10-4.el81:1.32.10-4.el8
Red Hat:enterprise_linux:8::baseosNetworkManager-config-serverbefore 1:1.32.10-4.el81:1.32.10-4.el8

+11

Same product

systemd project: all records

Other highest-scoring records for the same primary product.

  • CVE-2017-9445In systemd through 233, certain sizes passed to dns_packet_new in systemd-resolved can cause it to allocate a buffer that's too small.
    48Plan
  • CVE-2018-21029systemd 239 through 245 accepts any certificate signed by a trusted certificate authority for DNS Over TLS.
    40Plan
  • CVE-2015-7510Stack-based buffer overflow in the getpwnam and getgrnam functions of the NSS module nss-mymachines in systemd.
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2020-1712Mar 31, 2020 · A heap use-after-free vulnerability was found in systemd before version v245-rc1, where asynchronous Polkit queries are performed while…
    31Monitor
  • ← EarlierCVE-2020-13776Jun 3, 2020 · systemd through v245 mishandles numerical usernames such as ones composed of decimal digits or 0x followed by hex digits, as demonstrated…
    26Monitor
  • Later →CVE-2021-33910Jul 20, 2021 · basic/unit-name.c in systemd prior to 246.15, 247.8, 248.5, and 249.1 has a Memory Allocation with an Excessive Size Value (involving…
    25Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:NetworkManager-cloud-setup1:1.32.10-4.el8 · AlmaLinux:8Package registry (OSV)
almalinux:NetworkManager-libnm-devel1:1.32.10-4.el8 · AlmaLinux:8Package registry (OSV)
debian:systemd249.4-2 · Debian:12Package registry (OSV)
opensuse:NetworkManager1.32.10-2.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:systemd246.15-7.11.1 · openSUSE:Leap 15.3Package registry (OSV)
red hat:NetworkManager-adsl-debuginfo1:1.32.10-4.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:NetworkManager-bluetooth-debuginfo1:1.32.10-4.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:NetworkManager-cloud-setup1:1.32.10-4.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:NetworkManager-cloud-setup-debuginfo1:1.32.10-4.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:NetworkManager-debuginfo1:1.32.10-4.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:NetworkManager-debugsource1:1.32.10-4.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:NetworkManager-libnm-debuginfo1:1.32.10-4.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:NetworkManager-ovs-debuginfo1:1.32.10-4.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:NetworkManager-ppp-debuginfo1:1.32.10-4.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:NetworkManager-team-debuginfo1:1.32.10-4.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:NetworkManager-tui-debuginfo1:1.32.10-4.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
red hat:NetworkManager-wifi-debuginfo1:1.32.10-4.el8 · Red Hat:enterprise_linux:8::appstreamPackage registry (OSV)
rocky linux:NetworkManager1:1.32.10-4.el8 · Rocky Linux:8Package registry (OSV)
suse:systemd246.15-7.11.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP3Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Someone on the same network segment can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Adjacent
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Changed
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-290 · Authentication Bypass by Spoofing

CVSS vector

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

References

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records