Cilium up to 1.14.13/1.15.7 Label race condition

Summaryinfo

A vulnerability was found in Cilium up to 1.14.13/1.15.7. It has been rated as problematic. Affected by this vulnerability is an unknown functionality of the component Label Handler. This manipulation causes race condition. This vulnerability appears as CVE-2024-42488. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Cilium up to 1.14.13/1.15.7. It has been declared as problematic. Affected by this vulnerability is an unknown function of the component Label Handler. The manipulation with an unknown input leads to a race condition vulnerability. The CWE definition for the vulnerability is CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. As an impact it is known to affect confidentiality. The summary by CVE is:

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Prior to versions 1.14.14 and 1.15.8, a race condition in the Cilium agent can cause the agent to ignore labels that should be applied to a node. This could in turn cause CiliumClusterwideNetworkPolicies intended for nodes with the ignored label to not apply, leading to policy bypass. This issue has been patched in Cilium v1.14.14 and v1.15.8 As the underlying issue depends on a race condition, users unable to upgrade can restart the Cilium agent on affected nodes until the affected policies are confirmed to be working as expected.

The advisory is shared at github.com. This vulnerability is known as CVE-2024-42488 since 08/02/2024. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

Upgrading to version 1.14.14 or 1.15.8 eliminates this vulnerability. Applying the patch aa44dd148a9be95e07782e4f990e61678ef0abf8 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Name

• Cilium

Version

• 1.14.0
• 1.14.1
• 1.14.2
• 1.14.3
• 1.14.4
• 1.14.5
• 1.14.6
• 1.14.7
• 1.14.8
• 1.14.9
• 1.14.10
• 1.14.11
• 1.14.12
• 1.14.13
• 1.15.0
• 1.15.1
• 1.15.2
• 1.15.3
• 1.15.4
• 1.15.5
• 1.15.6
• 1.15.7

License

• open-source

Website

• Product: https://github.com/cilium/cilium/

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