Security readout for executives and security teams
Plain-English summary
CVE-2023-21422 affects Samsung Mobile Devices running Android 11 or 12 before Samsung's January 2023 SMR Release 1. A local attacker could set a custom DNS server without the required permission. This may expose some browsing or network resolution activity to manipulation or disruption, but the sources do not show remote exploitation or active attacks.
Executive priority
Treat this as a moderate mobile fleet hygiene issue. It does not appear to be remotely exploitable from the provided evidence, but outdated Samsung devices could allow unauthorized DNS changes that affect trust in network traffic resolution.
Technical view
The flaw is an improper authorization issue, CWE-285, in semAddPublicDnsAddr in Samsung WifiService. The CVSS 3.1 score is 5.7 with local attack vector, low complexity, no privileges, no user interaction, changed scope, low confidentiality impact, and low availability impact. The source bundle identifies Samsung Mobile Devices on Android R(11) and S(12).
Likely exposure
Exposure is most likely in fleets with Samsung Android 11 or 12 devices that have not received SMR Jan-2023 Release 1 or later. Devices already updated beyond that release are not indicated as affected by the provided sources.
Exploitation context
The CVE data describes local exploitation without privileges or user interaction, but it does not provide public exploit details. CISA KEV status is false in the source bundle, so there is no cited evidence of known active exploitation.
Researcher notes
Key evidence is limited to CVE metadata and Samsung's January 2023 security bulletin. The affected function is semAddPublicDnsAddr in WifiService, and the weakness is improper authorization. No exploit code, proof of concept, or detailed patch diff is included in the source bundle.
Mitigation direction
- Apply Samsung SMR Jan-2023 Release 1 or later to affected Samsung devices.
- Prioritize unmanaged, personally owned, or slow-patching Android 11 and 12 Samsung devices.
- Check Samsung's mobile security bulletin for device-specific update availability.
- Use MDM compliance rules to block outdated affected builds from sensitive networks.
Validation and detection
- Inventory Samsung devices running Android 11 or 12.
- Compare installed security patch levels against SMR Jan-2023 Release 1 or later.
- Confirm MDM records show successful update deployment on affected models.
- Review fleet exceptions for devices unable to receive Samsung security updates.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-285: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2023-21422 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.7 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:L2.52.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.7MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:L
Source materials
- CVE List V5 sourceCVE List V5
- https://security.samsungmobile.com/securityUpdate.smsb?year=2023&month=01CVE reference
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Authorization
Improper Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.