CVE-2023-54356 kyverno CVE debrief

Who should care

Kyverno users and administrators should be aware of this vulnerability and take steps to mitigate it. This includes reviewing their current deployments, identifying affected versions, and applying vendor remediation. Security teams should prioritize patching and verify that compensating controls are in place for exposed systems. Operators and platform administrators should review the vulnerability's impact on their environments and coordinate with security teams for remediation efforts. Vulnerability management processes should be updated to include checks for this vulnerability in regular scans and assessments. Asset inventory and monitoring processes should be reviewed to ensure that affected systems are properly tracked and reviewed for potential exposure. Rollback and change window processes should be evaluated to ensure that patches can be applied in a timely manner. Source tracking and monitoring should be implemented to detect potential exploitation attempts. Overall, a coordinated effort is needed across operations, security, and IT teams to address this vulnerability effectively. Given the potential impact, it is crucial that all stakeholders are informed and involved in the remediation process to minimize operational disruptions and ensure the security of affected systems. This may involve reviewing current security policies and procedures to ensure they align with the vendor's guidance on mitigating this vulnerability. By taking a comprehensive approach, organizations can reduce their risk exposure and protect their systems from potential attacks. Additionally, users should verify that their current configurations and deployments are not using the vulnerable cipher suites and take steps to disable them if necessary. This may involve reviewing TLS endpoint configurations and updating them to use more secure cipher suites. By prioritizing patching and taking proactive steps to mitigate this vulnerability, organizations can minimize their risk exposure and protect their systems from potential attacks. It is also important to note that while patching is the primary recommended action, additional defensive measures such as compensating controls and source

Technical summary

Kyverno versions 1.9.4 and earlier support insecure 3DES cipher suites (TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA and TLS_RSA_WITH_3DES_EDE_CBC_SHA) on their TLS endpoints, vulnerable to Sweet32 attacks (CVE-2016-2183). This vulnerability could allow an attacker to recover small amounts of plaintext over very long-lived TLS connections carrying large volumes of traffic. The issue is fixed in Kyverno 1.9.5 and 1.10.0. Users should assess their exposure and prioritize patching.

Defensive priority

Kyverno users should prioritize patching to avoid potential Sweet32 attacks.

Recommended defensive actions

• Inventory checks for Kyverno versions 1.9.4 and earlier
• Apply vendor remediation: upgrade to Kyverno 1.9.5 or 1.10.0
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance

Evidence notes

Evidence is limited; primary official records indicate Kyverno versions 1.9.4 and earlier support insecure 3DES cipher suites, vulnerable to Sweet32 attacks. Users should verify affected versions and check for vendor remediation. Additional verification steps are needed to confirm affected deployments and assess potential impact.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.