Security features bypass in Open Virtual Network - CVE-2025-0650
Published: February 5, 2025
Vulnerability identifier: #VU103659
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:L/E:U/U:Green
CVE-ID: CVE-2025-0650
CWE-ID: CWE-254
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Open Virtual Network
Affected software:
Open Virtual Network
Open Virtual Network
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to improper handling of UDP packets. A remote attacker can send specially crafted UDP packets that bypass egress access control lists (ACLs) in OVN installations and gain unauthorized access to virtual machines and containers running on the OVN network.
Successful exploitation of the vulnerability requires that ACLs on OVN installations are configured with a logical switch with DNS records set on it and if the same switch has any egress ACLs configured.
How to mitigate CVE-2025-0650
Install updates from vendor's website.
Sources
- http://www.openwall.com/lists/oss-security/2025/01/22/11
- https://bugzilla.redhat.com/show_bug.cgi?id=2339537
- https://www.openwall.com/lists/oss-security/2025/01/22/5
- https://github.com/ovn-org/ovn/commit/f22a1ba9c127795bebcfbd41d772bb071f893a6d
- https://github.com/ovn-org/ovn/commit/70618a65fd49f1d1d5498927c0bed63e296dafb7
- https://github.com/ovn-org/ovn/commit/249c52ad011cacb4c182dc64e88977ac7c61f668
- https://mail.openvswitch.org/pipermail/ovs-dev/2025-January/419993.html