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    February 2022
    Product Security Bulletin

    Published 2022-02-07

    The MediaTek Product Security Bulletin contains details of security vulnerabilities affecting MediaTek Smartphone, Tablet, AIoT and Smart display 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 and Smart display 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-2022-20024, CVE-2022-20025, CVE-2022-20026, CVE-2022-20027, CVE-2022-20028
    Medium CVE-2022-20029, CVE-2022-20030, CVE-2022-20031, CVE-2022-20032, CVE-2022-20033, CVE-2022-20017, CVE-2022-20034, CVE-2022-20035, CVE-2022-20036, CVE-2022-20037, CVE-2022-20038, CVE-2022-20039, CVE-2022-20040, CVE-2022-20041, CVE-2022-20042, CVE-2022-20043, CVE-2022-20044, CVE-2022-20045, CVE-2022-20046

    Details

    CVE CVE-2022-20024
    Title Improper input validation in system service
    Severity High
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In system service, there is a possible permission bypass due to a missing permission check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6580, MT6739, MT6750, MT6761, MT6762, MT6763, MT6765, MT6768, MT6771, MT6779, MT8167, MT8168, MT8173, MT8175, MT8185, MT8321, MT8362A, MT8365, MT8385, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-20025
    Title Stack-based buffer overflow in Bluetooth
    Severity High
    Vulnerability Type EoP
    CWE CWE-121 Stack-based Buffer Overflow
    Description In Bluetooth, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT8167, MT8175, MT8183, MT8362A, MT8365, MT8385
    Affected Software Versions Android 8.1, 9.0, 10.0, 11.0, 12.0

    CVE CVE-2022-20026
    Title Stack-based buffer overflow in Bluetooth
    Severity High
    Vulnerability Type EoP
    CWE CWE-122 Stack-based Buffer Overflow
    Description In Bluetooth, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT8167, MT8175, MT8183, MT8362A, MT8365, MT8385
    Affected Software Versions Android 8.1, 9.0, 10.0, 11.0, 12.0

    CVE CVE-2022-20027
    Title Stack-based buffer overflow in Bluetooth
    Severity High
    Vulnerability Type EoP
    CWE CWE-123 Stack-based Buffer Overflow
    Description In Bluetooth, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT8167, MT8175, MT8183, MT8362A, MT8365, MT8385
    Affected Software Versions Android 8.1, 9.0, 10.0, 11.0, 12.0

    CVE CVE-2022-20028
    Title Stack-based buffer overflow in Bluetooth
    Severity High
    Vulnerability Type EoP
    CWE CWE-123 Stack-based Buffer Overflow
    Description In Bluetooth, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT8167, MT8175, MT8183, MT8362A, MT8365, MT8385
    Affected Software Versions Android 8.1, 9.0, 10.0, 11.0, 12.0

    CVE CVE-2022-20029
    Title Out-of-bounds read in cmdq driver
    Severity Medium
    Vulnerability Type ID
    CWE CWE-125 Out-of-bounds Read
    Description In cmdq driver, there is a possible out of bounds read due to an incorrect 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, MT6785, MT6833, MT6853, MT6853T, MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT8163, MT8167, MT8168, MT8173, MT8175, MT8183, MT8321, MT8362A, MT8365, MT8385, MT8735B, MT8765, MT8766, MT8768, MT8786, MT8788, MT8791, MT8797
    Affected Software Versions Android 10.0, 11.0, 12.0

    CVE CVE-2022-20030
    Title Stack-based buffer overflow in vow driver
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-121 Stack-based Buffer Overflow
    Description In vow driver, there is a possible out of bounds write due to a stack-based buffer overflow. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6781, MT6785, MT6833, MT6853, MT6853T, MT6873, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT8185, MT8789, MT8791, MT8797
    Affected Software Versions Android 10.0, 11.0, 12.0

    CVE CVE-2022-20031
    Title Use after free in fb driver
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-416 Use After Free
    Description In fb driver, there is a possible memory corruption due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6580, MT6582E, MT6582H, MT6582T, MT6582W, MT6582_90, MT6589, MT6589TD, MT6592E, MT6592H, MT6592T, MT6592W, MT6592_90, MT6595, MT6731, MT6732, MT6735, MT6737, MT6739, MT6750, MT6750S, MT6752, MT6753, MT6755, MT6755S, MT6757, MT6757C, MT6757CD, MT6757CH, MT6758, MT6761, MT6762, MT6763, MT6765, MT6768, MT6769, MT6771, MT6779, MT6781, MT6785, MT6795, MT6797, MT6799, MT6833, MT6853, MT6853T, MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893
    Affected Software Versions Android 10.0, 11.0

    CVE CVE-2022-20032
    Title Out-of-bounds read in vow driver
    Severity Medium
    Vulnerability Type ID
    CWE CWE-125 Out-of-bounds Read
    Description In vow driver, there is a possible memory corruption due to a race condition. This could lead to local information disclosure with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6781, MT6785, MT6833, MT6853, MT6853T, MT6873, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT8185, MT8789, MT8791, MT8797
    Affected Software Versions Android 10.0, 11.0, 12.0

    CVE CVE-2022-20033
    Title Out-of-bounds read in camera driver
    Severity Medium
    Vulnerability Type ID
    CWE CWE-125 Out-of-bounds Read
    Description In camera driver, there is a possible out of bounds read due to an incorrect 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, MT6765, MT6768, MT6771, MT6779, MT6781, MT6833, MT6853, MT6853T, MT6873, MT6877, MT6883, MT6885, MT6889, MT6893, MT8167, MT8168, MT8173, MT8362A, MT8365
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-20017
    Title Exposure of sensitive information to an unauthorized actor in ion driver
    Severity Medium
    Vulnerability Type ID
    CWE CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
    Description In ion driver, there is a possible information disclosure due to an incorrect bounds check. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6765, MT6785, MT6833, MT6853, MT6873, MT6877, MT6885, MT6893, MT8167, MT8168, MT8173, MT8175, MT8185, MT8321, MT8362A, MT8365, MT8385, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 10.0, 11.0, 12.0

    CVE CVE-2022-20034
    Title Improper authentication in Preloader XFLASH
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-287 Improper Authentication
    Description In Preloader XFLASH, there is a possible escalation of privilege due to an improper certificate validation. This could lead to local escalation of privilege for an attacker who has physical access to the device with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6580, MT6735, MT6739, MT6761, MT6763, MT6765, MT6768, MT6769, MT6771, MT6779, MT6781, MT6785, MT6799, MT6833, MT6853, MT6873, MT6875, MT6877, MT6885, MT6891, MT6893
    Affected Software Versions Android 11.0

    CVE CVE-2022-20035
    Title Use after free in vcu driver
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-416 Use After Free
    Description In vcu driver, there is a possible information disclosure due to a use after free. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6768, MT6769, MT6779, MT6781, MT6785, MT6833, MT6853, MT6853T, MT6873, MT6877, MT6885, MT6890, MT6891, MT6893, MT8167, MT8168, MT8173, MT8175, MT8185, MT8321, MT8362A, MT8365, MT8385, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 10.0, 11.0

    CVE CVE-2022-20036
    Title Exposure of sensitive information to an unauthorized actor in ion driver
    Severity Medium
    Vulnerability Type ID
    CWE CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
    Description In ion driver, there is a possible information disclosure due to an incorrect bounds check. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6735, MT6737, MT6739, MT6750, MT6750S, MT6753, MT6755, MT6755S, MT6757, MT6757C, MT6757CD, MT6757CH, MT6758, MT6761, MT6762, MT6763, MT6765, MT6768, MT6769, MT6771, MT6779, MT6781, MT6785, MT6795, MT6797, MT6799, MT6833, MT6853, MT6853T, MT6873, MT6875, MT6877, MT6880, MT6883, MT6885, MT6889, MT6890, MT6891, MT6893, MT8167, MT8168, MT8173, MT8175, MT8185, MT8321, MT8362A, MT8365, MT8385, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791
    Affected Software Versions Android 10.0, 11.0

    CVE CVE-2022-20037
    Title Exposure of sensitive information to an unauthorized actor in ion driver
    Severity Medium
    Vulnerability Type ID
    CWE CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
    Description In ion driver, there is a possible information disclosure due to an incorrect bounds check. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6735, MT6737, MT6739, MT6750, MT6750S, MT6753, MT6755, MT6755S, MT6757, MT6757C, MT6757CD, MT6757CH, MT6758, MT6761, MT6762, MT6763, MT6765, MT6768, MT6769, MT6771, MT6779, MT6781, MT6785, MT6795, MT6797, MT6799, MT6833, MT6853, MT6853T, MT6873, MT6875, MT6877, MT6880, MT6883, MT6885, MT6889, MT6890, MT6891, MT6893, MT8167, MT8168, MT8173, MT8175, MT8185, MT8321, MT8362A, MT8365, MT8385, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 10.0, 11.0

    CVE CVE-2022-20038
    Title Improper restriction of operations within the bounds of a memory buffer in ccu driver
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
    Description In ccu driver, there is a possible memory corruption 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 MT6833, MT6853, MT6873, MT6877, MT6885, MT6893, MT8791, MT8797
    Affected Software Versions Android 11.0

    CVE CVE-2022-20039
    Title Integer overflow or wraparound in ccu driver
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-190 Integer Overflow or Wraparound
    Description In ccu driver, there is a possible memory corruption due to an integer overflow. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6833, MT6853, MT6873, MT6877, MT6883, MT6893, MT8791, MT8797
    Affected Software Versions Android 11.0

    CVE CVE-2022-20040
    Title Stack-based buffer overflow in power_hal_manager_service
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-121 Stack-based Buffer Overflow
    Description In power_hal_manager_service, there is a possible permission bypass due to a stack-based buffer overflow. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6735, MT6737, MT6739, MT6755, MT6757, MT6761, MT6771, MT6779, MT6785, MT6833, MT6853, MT6873, MT6875, MT6877, MT6880, MT6883, MT6885, MT6889, MT6890, MT6891, MT6893, MT8167, MT8168, MT8173, MT8175, MT8185, MT8321, MT8362A, MT8365, MT8385, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-20041
    Title Improper privilege management in Bluetooth
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-269 Improper Privilege Management
    Description In Bluetooth, there is a possible escalation of privilege due to a missing permission check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT8167, MT8175, MT8183, MT8362A, MT8365, MT8385
    Affected Software Versions Android 8.1, 9.0, 10.0, 11.0, 12.0

    CVE CVE-2022-20042
    Title Exposure of sensitive information to an unauthorized actor in Bluetooth
    Severity Medium
    Vulnerability Type ID
    CWE CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
    Description In Bluetooth, there is a possible information disclosure due to incorrect error handling. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT8167, MT8175, MT8183, MT8362A, MT8365, MT8385
    Affected Software Versions Android 8.1, 9.0, 10.0, 11.0, 12.0

    CVE CVE-2022-20043
    Title Improper privilege management in Bluetooth
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-269 Improper Privilege Management
    Description In Bluetooth, there is a possible escalation of privilege due to a missing permission check. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT8167, MT8175, MT8183, MT8362A, MT8365, MT8385
    Affected Software Versions Android 8.1, 9.0, 10.0, 11.0, 12.0

    CVE CVE-2022-20044
    Title Use after free in Bluetooth
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-416 Use After Free
    Description In Bluetooth, there is a possible service crash due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT8167, MT8175, MT8183, MT8362A, MT8365, MT8385
    Affected Software Versions Android 8.1, 9.0, 10.0, 11.0, 12.0

    CVE CVE-2022-20045
    Title Use after free in Bluetooth
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-416 Use After Free
    Description In Bluetooth, there is a possible service crash due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT8167, MT8175, MT8183, MT8362A, MT8365, MT8385
    Affected Software Versions Android 8.1, 9.0, 10.0, 11.0, 12.0

    CVE CVE-2022-20046
    Title Missing release of memory after effective lifetime in Bluetooth
    Severity Medium
    Vulnerability Type DoS
    CWE CWE-401 Missing Release of Memory after Effective Lifetime
    Description In Bluetooth, there is a possible memory corruption due to a logic error. This could lead to local denial of service with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT8167, MT8175, MT8183, MT8362A, MT8365, MT8385
    Affected Software Versions Android 8.1, 9.0, 10.0, 11.0, 12.0

    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 February 7, 2022 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.