CVE-2023-42564 — Improper access control in knoxcustom service prior to SMR Dec-2023 Release 1 al

Improper access control in knoxcustom service prior to SMR Dec-2023 Release 1 allows attacker to send broadcast with system privilege.

01What is this vulnerability?

Improper access control in knoxcustom service prior to SMR Dec-2023 Release 1 allows attacker to send broadcast with system privilege.

02Affected products

Vendor	Product	Versions
Samsung Mobile	Samsung Mobile Devices	SMR Dec-2023 Release in Android 11, 12, 13, 14

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

Open in Sigma generator →

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-12-05T02:44:21.326Z
• Last modified: 2024-12-02T17:12:56.544Z

09References

• security.samsungmobile.com — https://security.samsungmobile.com/securityUpdate.smsb?year=2023&month=12