CVE-2023-42531 — Improper access control vulnerability in SmsController prior to SMR Nov-2023 Rel

Improper access control vulnerability in SmsController prior to SMR Nov-2023 Release1 allows local attackers to bypass restrictions on starting activities from the background.

01What is this vulnerability?

Improper access control vulnerability in SmsController prior to SMR Nov-2023 Release1 allows local attackers to bypass restrictions on starting activities from the background.

02Affected products

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

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:

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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: 2023-11-07T07:49:29.442Z
• Last modified: 2025-06-12T14:15:55.130Z

09References

• security.samsungmobile.com — https://security.samsungmobile.com/securityUpdate.smsb?year=2023&month=11