CVE-2022-43915

Q: What is the severity of CVE-2022-43915?

CVE-2022-43915 has a CVSS score of 6.8 (MEDIUM). This vulnerability in IBM App Connect Enterprise Certified Container allows users with privileged access to running Pods to elevate their privileges by exploiting unrestricted calls to the unshare system call. It affects versions 5.0 through 12.1 of the containerized deployment. Attackers with initial access to a Pod can gain higher privileges within the container environment.

6.8 MEDIUM

📋 TL;DR

This vulnerability in IBM App Connect Enterprise Certified Container allows users with privileged access to running Pods to elevate their privileges by exploiting unrestricted calls to the unshare system call. It affects versions 5.0 through 12.1 of the containerized deployment. Attackers with initial access to a Pod can gain higher privileges within the container environment.

💻 Affected Systems

Products:

IBM App Connect Enterprise Certified Container

Versions: 5.0, 7.1, 7.2, 8.0, 8.1, 8.2, 9.0, 9.1, 9.2, 10.0, 10.1, 11.0, 11.1, 11.2, 11.3, 11.4, 11.5, 11.6, 12.0, 12.1

Operating Systems: Linux (containerized deployments)

Default Config Vulnerable: ⚠️ Yes

Notes: Only affects containerized deployments; traditional installations are not vulnerable. Requires privileged access to a running Pod.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

An attacker with initial Pod access could achieve container escape, gain root privileges on the host system, and potentially compromise the entire Kubernetes cluster.

🟠

Likely Case

Privileged escalation within the container environment, allowing lateral movement to other containers or services, data exfiltration, and persistence establishment.

🟢

If Mitigated

Limited to container-level privilege escalation if proper network segmentation and least privilege access controls are implemented.

🌐 Internet-Facing: MEDIUM

🏢 Internal Only: HIGH

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Exploitation requires existing privileged access to a Pod. No public exploit code has been observed, but the vulnerability is well-documented.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Apply security updates as per IBM advisory. Specific fixed versions vary by release stream.

Vendor Advisory: https://www.ibm.com/support/pages/node/7166463

Restart Required: Yes

Instructions:

1. Review IBM advisory for your specific version. 2. Update to the latest patched container image. 3. Redeploy affected Pods with the updated image. 4. Verify no vulnerable containers remain running.

🔧 Temporary Workarounds

Restrict Pod Security Context

linux

Apply Kubernetes Pod Security Standards to limit privileged operations in Pods.

kubectl label namespace <namespace> pod-security.kubernetes.io/enforce=restricted

Use Non-Privileged Containers

linux

Configure containers to run without privileged access or CAP_SYS_ADMIN capabilities.

securityContext:
  privileged: false
  capabilities:
    drop:
      - ALL

🧯 If You Can't Patch

Implement strict network segmentation to isolate affected containers from critical systems.
Apply Kubernetes admission controllers to prevent deployment of vulnerable container configurations.

🔍 How to Verify

Check if Vulnerable:

Check running container versions: kubectl get pods -o jsonpath='{.items[*].spec.containers[*].image}' | grep 'ibm-app-connect'

Check Version:

kubectl describe pod <pod-name> | grep Image

Verify Fix Applied:

Verify updated container images are deployed and no vulnerable versions are running using the same command.

📡 Detection & Monitoring

Log Indicators:

Unusual privilege escalation attempts in container logs
Suspicious unshare system calls in audit logs

Network Indicators:

Unexpected outbound connections from containers to sensitive systems
Lateral movement attempts between containers

SIEM Query:

source="kubernetes" AND ("unshare" OR "privilege escalation")

📊 Metadata

CVE ID: CVE-2022-43915

CVSS v3 Score: 6.8 (MEDIUM)

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

CWE: CWE-732

Published: August 24, 2024

Last Updated: September 21, 2024

🔗 References

https://exchange.xforce.ibmcloud.com/vulnerabilities/241037 VDB Entry,Vendor Advisory
https://www.ibm.com/support/pages/node/7166463 Vendor Advisory

📋 TL;DR

💻 Affected Systems

📦 What is this software?

App Connect Enterprise Certified Container by Ibm

App Connect Enterprise Certified Container by Ibm

App Connect Enterprise Certified Container by Ibm

App Connect Enterprise Certified Container by Ibm

App Connect Enterprise Certified Container by Ibm

App Connect Enterprise Certified Container by Ibm

App Connect Enterprise Certified Container by Ibm

App Connect Enterprise Certified Container by Ibm

App Connect Enterprise Certified Container by Ibm

App Connect Enterprise Certified Container by Ibm

App Connect Enterprise Certified Container by Ibm

App Connect Enterprise Certified Container by Ibm

App Connect Enterprise Certified Container by Ibm

App Connect Enterprise Certified Container by Ibm

App Connect Enterprise Certified Container by Ibm

App Connect Enterprise Certified Container by Ibm

App Connect Enterprise Certified Container by Ibm

App Connect Enterprise Certified Container by Ibm

App Connect Enterprise Certified Container by Ibm

App Connect Enterprise Certified Container by Ibm

⚠️ Risk & Real-World Impact

Worst Case

Likely Case

If Mitigated

🎯 Exploit Status

🛠️ Fix & Mitigation

✅ Official Fix

Instructions:

🔧 Temporary Workarounds

Restrict Pod Security Context

Use Non-Privileged Containers

🧯 If You Can't Patch

🔍 How to Verify

Check if Vulnerable:

Check Version:

Verify Fix Applied:

📡 Detection & Monitoring

Log Indicators:

Network Indicators:

SIEM Query:

📊 Metadata

🔗 References

📤 Share & Export

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