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GHSA-qcmw-8mm4-4p28
No affected components available
Impact
This is a missing encryption vulnerability (CWE-311) affecting inter-Node Pod traffic. In Antrea clusters configured for dual-stack networking with IPsec encryption enabled (trafficEncryptionMode: ipsec), Antrea fails to apply encryption for IPv6 Pod traffic.
While the IPv4 traffic is correctly encrypted via ESP (Encapsulating Security Payload), traffic using IPv6 is transmitted in plaintext. This occurs because the packets are encapsulated (using Geneve or VXLAN) but bypass the IPsec encryption layer.
Impacted Users: users with dual-stack clusters and IPsec encryption enabled.
Single-stack IPv4 or IPv6 clusters are not affected.
Patches
Yes, the issue has been patched: https://github.com/antrea-io/antrea/pull/7759 Users should upgrade to one of the following versions:
- Antrea v2.6.0 or later
- Antrea v2.5.2
- Antrea v2.4.5
Antrea recommends running the antctl check installation --run ipsec tool after upgrading to verify that both address families are correctly producing ESP traffic.
Workarounds
There is no configuration workaround to enable IPsec IPv6 in affected versions. If an immediate upgrade is not possible, user may consider using WireGuard instead for inter-Node Pod traffic encryption. The WireGuard support in Antrea does not suffer from the same issue.
Resources
Pull Request with Fix: antrea-io/antrea#7759 Validation Tool PR: antrea-io/antrea#7757 Antrea Documentation: Traffic Encryption Guide
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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