Openvpn: DHCP can add routes to a client’s routing table via the classless static route option (121). (CVE-2024-3661)
DHCP can add routes to a client’s routing table via the classless static route option (121). VPN-based security solutions that rely on routes to redirect traffic can be forced to leak traffic over the physical interface. An attacker on the same local network can read, disrupt, or possibly modify network traffic that was expected to be protected by the VPN.
AI Analysis
Technical Summary
CVE-2024-3661 is a vulnerability in NetworkManager where DHCP routing options can be used to manipulate VPN traffic that is interface-based. NetworkManager manages various network devices and connections, including Ethernet, wireless, WWAN, PPPoE, and VPN services. The vulnerability could allow an attacker to influence VPN traffic routing via DHCP options. Red Hat has issued a security advisory (RHSA-2025:16411) providing an update to fix this issue in Red Hat Enterprise Linux 9.4 Extended Update Support and related builds.
Potential Impact
The vulnerability allows DHCP routing options to manipulate VPN traffic on affected systems, potentially impacting the integrity or routing of VPN connections managed by NetworkManager. The advisory rates the security impact as moderate. No known exploits in the wild have been reported.
Mitigation Recommendations
Red Hat has released an official security update to address this vulnerability. Users of Red Hat Enterprise Linux 9.4 Extended Update Support and related variants should apply the NetworkManager update as described in Red Hat advisory RHSA-2025:16411. For detailed update instructions, refer to https://access.redhat.com/articles/11258. No additional mitigation actions are indicated by the vendor.
Openvpn: DHCP can add routes to a client’s routing table via the classless static route option (121). (CVE-2024-3661)
Description
DHCP can add routes to a client’s routing table via the classless static route option (121). VPN-based security solutions that rely on routes to redirect traffic can be forced to leak traffic over the physical interface. An attacker on the same local network can read, disrupt, or possibly modify network traffic that was expected to be protected by the VPN.
CVSS v3.1
Score 7.6high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2024-3661 is a vulnerability in NetworkManager where DHCP routing options can be used to manipulate VPN traffic that is interface-based. NetworkManager manages various network devices and connections, including Ethernet, wireless, WWAN, PPPoE, and VPN services. The vulnerability could allow an attacker to influence VPN traffic routing via DHCP options. Red Hat has issued a security advisory (RHSA-2025:16411) providing an update to fix this issue in Red Hat Enterprise Linux 9.4 Extended Update Support and related builds.
Potential Impact
The vulnerability allows DHCP routing options to manipulate VPN traffic on affected systems, potentially impacting the integrity or routing of VPN connections managed by NetworkManager. The advisory rates the security impact as moderate. No known exploits in the wild have been reported.
Mitigation Recommendations
Red Hat has released an official security update to address this vulnerability. Users of Red Hat Enterprise Linux 9.4 Extended Update Support and related variants should apply the NetworkManager update as described in Red Hat advisory RHSA-2025:16411. For detailed update instructions, refer to https://access.redhat.com/articles/11258. No additional mitigation actions are indicated by the vendor.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2025:16411
- Cve Count
- 1
Threat ID: 6a3da1e24853345fc182c8cc
Added to database: 06/25/2026, 21:47:14 UTC
Last enriched: 06/25/2026, 22:30:25 UTC
Last updated: 09/10/2026, 19:36:48 UTC
Views: 25
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