Security readout for executives and security teams
Plain-English summary
CVE-2023-20605 is a MediaTek Android chipset issue in keyinstall. A local attacker who already has high/System-level privileges could read memory they should not access. It is not a remote takeover, but it can expose sensitive information on affected Android 11, 12, or 13 devices using listed MediaTek platforms.
Executive priority
Treat this as a targeted confidentiality risk, not an internet-wide emergency. Prioritize patch verification for fleets with affected MediaTek Android devices, especially devices handling sensitive data or exposed to untrusted apps, shared use, or prior compromise risk.
Technical view
The flaw is an out-of-bounds read caused by a missing bounds check in MediaTek keyinstall. CVSS 3.1 is 4.4: local access, low complexity, high privileges required, no user interaction, unchanged scope, high confidentiality impact, no integrity or availability impact. MediaTek identifies patch ID ALPS07550104.
Likely exposure
Exposure is likely on OEM Android devices using the listed MediaTek chipsets and Android 11.0, 12.0, or 13.0, if the vendor has not integrated MediaTek patch ALPS07550104. Confirm by device model, chipset, OS version, and OEM security bulletin status.
Exploitation context
The provided sources do not report active exploitation, and the CVE is not marked as CISA KEV. Exploitation is local and requires high privileges, which lowers broad attack urgency but matters where attackers can chain bugs or already hold privileged device access.
Researcher notes
Evidence is limited to the CVE record and MediaTek bulletin metadata. The sources name the component, impact, affected chipsets, Android versions, CVSS vector, and patch ID, but do not provide code-level root cause details, OEM build mappings, or public exploit evidence.
Mitigation direction
- Check OEM security bulletins for inclusion of MediaTek patch ALPS07550104.
- Prioritize updates for managed Android devices using affected MediaTek chipsets.
- Apply available Android firmware or security updates from the device OEM.
- Restrict privileged local access on managed devices where operationally possible.
- If no OEM update exists, request vendor guidance and document residual risk.
Validation and detection
- Inventory Android 11, 12, and 13 devices using affected MediaTek platforms.
- Map device models to OEM patch bulletins and firmware build dates.
- Verify whether the installed firmware includes ALPS07550104 or equivalent OEM fix.
- Confirm no unsupported devices remain in high-risk roles.
- Record exceptions where vendor patch information is unavailable.
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-119: Exact CWE lookup
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Open ATT&CK lookupCVE-2023-20605 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
- 4.4 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
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:H/UI:N/S:U/C:H/I:N/A:N0.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.4MediumVector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://corp.mediatek.com/product-security-bulletin/February-2023CVE 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 Restriction of Operations within the Bounds of a Memory Buffer
Improper Restriction of Operations within the Bounds of a Memory Buffer represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.