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    December 2022
    Product Security Bulletin

    Published 2022-12-05

    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-2022-32619, CVE-2022-32594, CVE-2022-32597, CVE-2022-32598, CVE-2022-32596, CVE-2022-32620
    Medium CVE-2022-32595, CVE-2022-32621, CVE-2022-32622, CVE-2022-32624, CVE-2022-32625, CVE-2022-32626, CVE-2022-32628, CVE-2022-32629, CVE-2022-32630, CVE-2022-32631, CVE-2022-32632, CVE-2022-32633, CVE-2022-32634

    Details

    CVE CVE-2022-32619
    Title Buffer copy without checking size of input ('classic buffer overflow') in keyinstall
    Severity High
    Vulnerability Type EoP
    CWE CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
    Description In keyinstall, 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 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-2022-32594
    Title Improper input validation in widevine
    Severity High
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In widevine, 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 MT6762, MT6765, MT6768, MT6769, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6853T, MT6855, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6889, MT6891, MT6893, MT6895, MT8385, MT8765, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 10.0, 11.0, 12.0

    CVE CVE-2022-32597
    Title Improper input validation in widevine
    Severity High
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In widevine, 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 MT6762, MT6765, MT6768, MT6769, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6853T, MT6855, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6889, MT6891, MT6893, MT6895, MT8385, MT8765, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 10.0, 11.0, 12.0

    CVE CVE-2022-32598
    Title Improper input validation in widevine
    Severity High
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In widevine, 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 MT6762, MT6765, MT6768, MT6769, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6853T, MT6855, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6889, MT6891, MT6893, MT6895, MT8385, MT8765, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 10.0, 11.0, 12.0

    CVE CVE-2022-32596
    Title Improper input validation in widevine
    Severity High
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In widevine, 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 MT6762, MT6765, MT6768, MT6769, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6853T, MT6855, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6889, MT6891, MT6893, MT6895, MT8385, MT8765, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 10.0, 11.0, 12.0

    CVE CVE-2022-32620
    Title Improper access control in mpu
    Severity High
    Vulnerability Type EoP
    CWE CWE-284 Improper Access Control
    Description In mpu, there is a possible memory corruption 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 MT6781, MT6789, MT6833, MT6853, MT6873, MT6877, MT8781, MT8791
    Affected Software Versions Android 11.0, 12.0, 13.0

    CVE CVE-2022-32595
    Title Improper input validation in widevine
    Severity Medium
    Vulnerability Type ID
    CWE CWE-20 Improper Input Validation
    Description In widevine, 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 MT6762, MT6765, MT6768, MT6769, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6853T, MT6855, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6889, MT6891, MT6893, MT6895, MT8385, MT8765, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 10.0, 11.0, 12.0

    CVE CVE-2022-32621
    Title Improper synchronization in isp
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-662 Improper Synchronization
    Description In isp, there is a possible out of bounds write 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 MT6895, MT6983
    Affected Software Versions Android 12.0

    CVE CVE-2022-32622
    Title Improper input validation in gz
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In gz, there is a possible memory corruption 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 MT6789, MT6855, MT6879, MT6895, MT6983, MT8781
    Affected Software Versions Android 11.0, 12.0, 13.0

    CVE CVE-2022-32624
    Title Buffer copy without checking size of input ('classic buffer overflow') in throttling
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
    Description In throttling, there is a possible out of bounds write due to an incorrect calculation of buffer size. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6789, MT6855, MT6895, MT6983, MT8168, MT8365, MT8781
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-32625
    Title Improper input validation in display
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In display, 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 MT6761, MT6765, MT6768, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6855, MT6873, MT6877, MT6879, MT6883, MT6885, MT6889, MT6893, MT6895, MT6983, MT8168, MT8365, MT8675, MT8766, MT8781, MT8791
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-32626
    Title Improper input validation in display
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In display, 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 MT6761, MT6765, MT6768, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6855, MT6873, MT6877, MT6879, MT6883, MT6885, MT6889, MT6893, MT6895, MT6983, MT8168, MT8365, MT8766, MT8781, MT8791
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-32628
    Title Improper input validation in isp
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In isp, 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 MT6833, MT6853, MT6855, MT6873, MT6877, MT6893, MT8791
    Affected Software Versions Android 12.0

    CVE CVE-2022-32629
    Title Improper input validation in isp
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In isp, 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 MT6833, MT6853, MT6855, MT6873, MT6877, MT6893, MT8791
    Affected Software Versions Android 12.0

    CVE CVE-2022-32630
    Title Stack-based buffer overflow in throttling
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-121 Stack-based Buffer Overflow
    Description In throttling, there is a possible out of bounds write due to an incorrect calculation of buffer size. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6789, MT6855, MT6895, MT6983, MT8781
    Affected Software Versions Android 12.0, 13.0

    CVE CVE-2022-32631
    Title Improper input validation in Wi-Fi
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In Wi-Fi, 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 MT6580, MT6739, MT6761, MT6765, MT6768, MT6771, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6873, MT6877, MT6879, MT6883, MT6895, MT6983, MT8168, MT8365, MT8385, MT8666, MT8667, MT8675, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 11.0, 12.0, 13.0 and Yocto 3.1

    CVE CVE-2022-32632
    Title Improper input validation in Wi-Fi
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In Wi-Fi, 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 MT6580, MT6735, MT6765, MT6768, MT6771, MT6779, MT6785, MT6833, MT6853, MT6873, MT6877, MT6885, MT6983, MT7663, MT7668, MT7902, MT7921, MT7933, MT8168, MT8365, MT8518, MT8532, MT8666, MT8667, MT8675, MT8695, MT8696, MT8766, MT8768, MT8786, MT8789, MT8791, MT8797
    Affected Software Versions Android 11.0, 12.0, 13.0 and Yocto 3.1,3.3

    CVE CVE-2022-32633
    Title Incorrect use of privileged apis in Wi-Fi
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-648 Incorrect Use of Privileged APIs
    Description In Wi-Fi, there is a possible memory access violation 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 MT6580, MT6739, MT6761, MT6762, MT6765, MT6768, MT6769, MT6771, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6855, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6889, MT6891, MT6893, MT6895, MT6983, MT7902, MT7921, MT8167S, MT8168, MT8175, MT8183, MT8185, MT8362A, MT8365, MT8385, MT8518, MT8532, MT8675, MT8695, MT8696, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 11.0, 12.0, 13.0 and Yocto 3.1,3.3

    CVE CVE-2022-32634
    Title Improper input validation in ccci
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In ccci, 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 MT6761, MT6765, MT6768, MT6779, MT6781, MT6785, MT6833, MT6853, MT6855, MT6873, MT6877, MT6879, MT6883, MT6885, MT6889, MT6893, MT6895, MT6983, MT8321, MT8385, MT8666, MT8675, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 11.0, 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 December 5, 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.