Security readout for executives and security teams
Plain-English summary
CVE-2023-20945 is an Android 10 NFC-related memory safety flaw. A local attacker with low privileges could potentially gain higher privileges without user interaction. The source bundle identifies high confidentiality, integrity, and availability impact, but does not provide evidence of active exploitation.
Executive priority
Prioritize remediation for Android 10 fleets, especially enterprise-managed devices with sensitive access. The issue is high severity local privilege escalation, but urgency is moderated by the lack of cited active exploitation evidence in the supplied sources.
Technical view
The flaw is a possible out-of-bounds write in phNciNfc_MfCreateXchgDataHdr within phNxpExtns_MifareStd.cpp, caused by a missing bounds check. It is classified as CWE-787 and scored CVSS 7.8 with local attack vector, low complexity, low privileges, and no user interaction.
Likely exposure
Exposure is limited to Android 10 according to the supplied CVE data. Organizations should focus on Android 10 devices that have not received the vendor update covering the February 2023 Android security bulletin.
Exploitation context
The CVSS vector indicates local exploitation requiring low privileges and no user interaction. The provided sources do not show CISA KEV listing, public exploitation, or exploit availability. Treat exploit status as unconfirmed from this bundle.
Researcher notes
Key evidence is limited to the CVE record and Android security bulletin reference. The bundle names the vulnerable function and classifies the bug as CWE-787, but does not include patch diff details, exploit prerequisites beyond CVSS, or device-specific OEM impact.
Mitigation direction
- Apply the OEM Android update that includes the February 2023 Android security bulletin.
- Prioritize Android 10 devices that are still in production or handle sensitive data.
- Check device vendor guidance for exact build numbers and update availability.
- Replace or isolate Android 10 devices that cannot receive the relevant security update.
Validation and detection
- Inventory managed Android devices and identify those running Android 10.
- Confirm each Android 10 device received the February 2023 Android security bulletin fix.
- Review OEM advisories for device-specific patch levels covering CVE-2023-20945.
- Track exceptions for devices without available updates and document compensating controls.
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-787: 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-2023-20945 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
- High
- CVSS
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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:L/UI:N/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://source.android.com/security/bulletin/2023-02-01CVE 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.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.