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    March 2023
    Product Security Bulletin

    Published 2023-03-06

    The MediaTek Product Security Bulletin contains details of security vulnerabilities affecting MediaTek Smartphone, Tablet, AIoT, Smart display, Smart platform and OTT chipsets. Device OEMs have been notified of all the issues and the corresponding security patches for at least two months before publication.

    The severity of the identified vulnerabilities was conducted based on the Common Vulnerability Scoring System version 3.1 (CVSS v3.1).
    The MediaTek Product Security Bulletin contains details of security vulnerabilities affecting MediaTek Smartphone, Tablet, AIoT, Smart display, Smart platform and OTT chipsets. Device OEMs have been notified of all the issues and the corresponding security patches for at least two months before publication.

    The severity of the identified vulnerabilities was conducted based on the Common Vulnerability Scoring System version 3.1 (CVSS v3.1).

    Summary
    Severity CVEs
    High CVE-2023-20620, CVE-2023-20621, CVE-2023-20623
    Medium CVE-2023-20624, CVE-2023-20625, CVE-2023-20626, CVE-2023-20627, CVE-2023-20628, CVE-2023-20630, CVE-2023-20632, CVE-2023-20633, CVE-2023-20634, CVE-2023-20635, CVE-2023-20636, CVE-2023-20637, CVE-2023-20638, CVE-2023-20639, CVE-2023-20640, CVE-2023-20641, CVE-2023-20642, CVE-2023-20643, CVE-2023-20644, CVE-2023-20645, CVE-2023-20646, CVE-2023-20647, CVE-2023-20648, CVE-2023-20649, CVE-2023-20650, CVE-2023-20651

    Details

    CVE CVE-2023-20620
    Title Time-of-check time-of-use (toctou) race condition in adsp
    Severity High
    Vulnerability Type EoP
    CWE CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
    Description In adsp, there is a possible escalation of privilege due to a logic error. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6879, MT6895, MT6983
    Affected Software Versions Android 12.0, 13.0

    CVE CVE-2023-20621
    Title Improper input validation in tinysys
    Severity High
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In tinysys, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6739, MT6761, MT6762, MT6765, MT6771, MT6789, MT6879, MT6883, MT6885, MT6893, MT6895, MT6983
    Affected Software Versions Android 10.0, 11.0, 12.0, 13.0

    CVE CVE-2023-20623
    Title Time-of-check time-of-use (toctou) race condition in ion
    Severity High
    Vulnerability Type EoP
    CWE CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
    Description In ion, there is a possible escalation of privilege due to improper locking. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6580, MT6735, MT6737, MT6739, MT6753, MT6757, MT6757C, MT6757CD, MT6757CH, MT6761, MT6762, MT6763, MT6765, MT6768, MT6769, MT6771, MT6779, MT6781, MT6785, MT6833, MT6853, MT6853T, MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT8173, MT8532, MT8666, MT8667, MT8788
    Affected Software Versions Android 10.0, 11.0, 12.0 or Yocto 3.1, 3.3, 4.0

    CVE CVE-2023-20624
    Title Buffer copy without checking size of input ('classic buffer overflow') in vow
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
    Description In vow, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6789, MT6833, MT6853, MT6855, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6983, MT8781, MT8791, MT8791T, MT8797
    Affected Software Versions Android 12.0, 13.0

    CVE CVE-2023-20625
    Title Improper synchronization in adsp
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-662 Improper Synchronization
    Description In adsp, there is a possible double free due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6739, MT6761, MT6765, MT6768, MT6769, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6853T, MT6873, MT6877, MT6879, MT6883, MT6885, MT6889, MT6893, MT6895, MT6983, MT8781, MT8791, MT8791T, MT8797
    Affected Software Versions Android 12.0, 13.0

    CVE CVE-2023-20626
    Title Improper input validation in msdc
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In msdc, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6739, MT6761, MT6765, MT6768, MT6771, MT6779, MT6781, MT6785, MT6833, MT6853, MT6873, MT6877, MT6883, MT6885, MT6889, MT6893, MT8666, MT8667, MT8675, MT8765, MT8766, MT8768, MT8785, MT8789, MT8791, MT8797
    Affected Software Versions Android 10.0, 11.0, 12.0

    CVE CVE-2023-20627
    Title Incorrect calculation of buffer size in pqframework
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-131 Incorrect Calculation of Buffer Size
    Description In pqframework, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6879, MT6895, MT6983, MT8167, MT8168
    Affected Software Versions Android 12.0, 13.0

    CVE CVE-2023-20628
    Title Improper check or handling of exceptional conditions in thermal
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-703 Improper Check or Handling of Exceptional Conditions
    Description In thermal, there is a possible memory corruption due to an uncaught exception. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6580, MT6739, MT6761, MT6762, MT6765, MT6768, MT6769, MT6771, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6855, MT6873, MT6879, MT6883, MT6885, MT6889, MT6891, MT6893, MT6895, MT6983, MT8167, MT8167S, MT8168, MT8175, MT8321, MT8362A, MT8365, MT8385, MT8765, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791T, MT8797
    Affected Software Versions Android 12.0, 13.0

    CVE CVE-2023-20630
    Title Out-of-bounds write in usb
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-787 Out-of-bounds Write
    Description In usb, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6580, MT6735, MT6739, MT6761, MT6763, MT6765, MT6768, MT6771, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6855, MT6873, MT6885, MT6893, MT6895, MT6983, MT8167, MT8168, MT8666, MT8675
    Affected Software Versions Android 11.0, 12.0, 13.0

    CVE CVE-2023-20632
    Title Out-of-bounds write in usb
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-787 Out-of-bounds Write
    Description In usb, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6580, MT6735, MT6739, MT6761, MT6763, MT6765, MT6768, MT6771, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6855, MT6873, MT6885, MT6893, MT6895, MT6983, MT8167, MT8168, MT8666, MT8675
    Affected Software Versions Android 11.0, 12.0, 13.0

    CVE CVE-2023-20633
    Title Improper validation of array index in usb
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-129 Improper Validation of Array Index
    Description In usb, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6580, MT6735, MT6739, MT6761, MT6763, MT6765, MT6768, MT6771, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6855, MT6873, MT6885, MT6893, MT6895, MT6983, MT8167, MT8168, MT8666, MT8675
    Affected Software Versions Android 11.0, 12.0, 13.0

    CVE CVE-2023-20634
    Title Improper input validation in widevine
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In widevine, there is a possible out of bounds write due to improper input validation. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6762, MT6765, MT6768, MT6769, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6853T, MT6855, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6889, MT6891, MT6893, MT8768, MT8786, MT8788, MT8789, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2023-20635
    Title Integer underflow (wrap or wraparound) in keyinstall
    Severity Medium
    Vulnerability Type ID
    CWE CWE-191 Integer Underflow (Wrap or Wraparound)
    Description In keyinstall, there is a possible information disclosure due to an integer overflow. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6580, MT6731, MT6735, MT6737, MT6739, MT6753, MT6757, MT6757C, MT6757CD, MT6757CH, MT6761, MT6762, MT6763, MT6765, MT6768, MT6769, MT6771, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6853T, MT6855, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6889, MT6891, MT6893, MT6895, MT6983, MT8185, MT8321, MT8385, MT8666, MT8667, MT8765, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791, MT8791T, MT8797
    Affected Software Versions Android 10.0, 11.0, 12.0, 13.0

    CVE CVE-2023-20636
    Title Improper input validation in display drm
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In display drm, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6895, MT6985, MT8168, MT8781
    Affected Software Versions Android 12.0, 13.0

    CVE CVE-2023-20637
    Title Improper input validation in ril
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In ril, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6879, MT6895, MT6983, MT8321, MT8765, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791T, MT8797
    Affected Software Versions Android 12.0, 13.0

    CVE CVE-2023-20638
    Title Improper input validation in ril
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In ril, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6739, MT6753, MT6761, MT6762, MT6763, MT6765, MT6768, MT6769, MT6771, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6853T, MT6855, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6889, MT6893, MT6895, MT6983, MT8321, MT8765, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791T, MT8797
    Affected Software Versions Android 12.0, 13.0

    CVE CVE-2023-20639
    Title Improper input validation in ril
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In ril, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6879, MT6895, MT6983, MT8321, MT8765, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791T, MT8797
    Affected Software Versions Android 12.0, 13.0

    CVE CVE-2023-20640
    Title Improper input validation in ril
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In ril, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6879, MT6895, MT6983, MT8791, MT8791T, MT8797
    Affected Software Versions Android 12.0, 13.0

    CVE CVE-2023-20641
    Title Improper input validation in ril
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In ril, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6879, MT6895, MT6983, MT8791, MT8791T, MT8797
    Affected Software Versions Android 12.0, 13.0

    CVE CVE-2023-20642
    Title Improper input validation in ril
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In ril, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6879, MT6895, MT6983, MT8321, MT8765, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791T, MT8797
    Affected Software Versions Android 12.0, 13.0

    CVE CVE-2023-20643
    Title Improper input validation in ril
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In ril, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6739, MT6761, MT6762, MT6765, MT6768, MT6769, MT6781, MT6785, MT6833, MT6853, MT6873, MT6875, MT6877, MT6891, MT6893, MT8321, MT8765, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791T, MT8797
    Affected Software Versions Android 12.0, 13.0

    CVE CVE-2023-20644
    Title Improper input validation in ril
    Severity Medium
    Vulnerability Type ID
    CWE CWE-20 Improper Input Validation
    Description In ril, there is a possible out of bounds read due to a missing bounds check. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6580, MT6739, MT6761, MT6765, MT6768, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6853T, MT6855, MT6873, MT6877, MT6879, MT6883, MT6885, MT6889, MT6893, MT6895, MT6983, MT8321, MT8765, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791T, MT8797
    Affected Software Versions Android 12.0, 13.0

    CVE CVE-2023-20645
    Title Improper input validation in ril
    Severity Medium
    Vulnerability Type ID
    CWE CWE-20 Improper Input Validation
    Description In ril, there is a possible out of bounds read due to a missing bounds check. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6739, MT6761, MT6762, MT6763, MT6765, MT6769, MT6771, MT6779, MT6785, MT6789, MT6873, MT6875, MT6877, MT6879, MT6895, MT6983, MT8791, MT8791T, MT8797
    Affected Software Versions Android 12.0, 13.0

    CVE CVE-2023-20646
    Title Improper input validation in ril
    Severity Medium
    Vulnerability Type ID
    CWE CWE-20 Improper Input Validation
    Description In ril, there is a possible out of bounds read due to a missing bounds check. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6737, MT6739, MT6753, MT6757, MT6757C, MT6757CD, MT6757CH, MT6761, MT6762, MT6763, MT6765, MT6768, MT6769, MT6771, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6853T, MT6855, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6889, MT6891, MT6893, MT6895, MT6983, MT8321, MT8765, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791T, MT8797
    Affected Software Versions Android 12.0, 13.0

    CVE CVE-2023-20647
    Title Improper input validation in ril
    Severity Medium
    Vulnerability Type ID
    CWE CWE-20 Improper Input Validation
    Description In ril, there is a possible out of bounds read due to a missing bounds check. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6739, MT6761, MT6762, MT6765, MT6768, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6855, MT6873, MT6877, MT6879, MT6883, MT6885, MT6889, MT6893, MT6895, MT6983, MT8321, MT8765, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791, MT8791T, MT8797
    Affected Software Versions Android 12.0, 13.0

    CVE CVE-2023-20648
    Title Improper input validation in ril
    Severity Medium
    Vulnerability Type ID
    CWE CWE-20 Improper Input Validation
    Description In ril, there is a possible out of bounds read due to a missing bounds check. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6761, MT6762, MT6763, MT6765, MT6768, MT6769, MT6771, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6853T, MT6855, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6889, MT6891, MT6893, MT6895, MT6983, MT8321, MT8765, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791, MT8791T, MT8797
    Affected Software Versions Android 12.0, 13.0

    CVE CVE-2023-20649
    Title Improper input validation in ril
    Severity Medium
    Vulnerability Type ID
    CWE CWE-20 Improper Input Validation
    Description In ril, there is a possible out of bounds read due to a missing bounds check. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6761, MT6762, MT6763, MT6765, MT6768, MT6769, MT6771, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6853T, MT6855, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6889, MT6891, MT6893, MT6895, MT6983, MT8321, MT8765, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791T, MT8797
    Affected Software Versions Android 12.0, 13.0

    CVE CVE-2023-20650
    Title Improper input validation in apu
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In apu, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6853, MT6853T, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6889, MT6891, MT6893, MT6895, MT6983
    Affected Software Versions Android 12.0, 13.0

    CVE CVE-2023-20651
    Title Improper input validation in apu
    Severity Medium
    Vulnerability Type ID
    CWE CWE-20 Improper Input Validation
    Description In apu, there is a possible out of bounds read due to a missing bounds check. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6853, MT6853T, MT6875, MT6877, MT6879, MT6883, MT6885, MT6889, MT6891, MT6893, MT6895, MT6983, MT8195Z
    Affected Software Versions Android 12.0, 13.0

    Vulnerability Type Definition

    Abbreviation Definition
    RCE Remote Code Execution
    EoP Elevation of Privilege
    ID Information Disclosure
    DoS Denial of Service
    N/A Classification not available

    Versions

    Version Date Description
    1.0 March 6, 2023 Bulletin published.


    Notes

    Information above is generated only at the time of creation of this Security Bulletin. The list of affected chipsets could be not complete. For any further information, device OEMs can reach your MediaTek contact person if needed.

    If you want to report a security vulnerability in MediaTek chipsets or products, please go to Report Security Vulnerability page on MediaTek website.

    Notes

    Information above is generated only at the time of creation of this Security Bulletin. The list of affected chipsets could be not complete. For any further information, device OEMs can reach your MediaTek contact person if needed.
    If you want to report a security vulnerability in MediaTek chipsets or products, please go to Report Security Vulnerability page on MediaTek website.