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    June 2022
    Product Security Bulletin

    Published 2022-06-06

    The MediaTek Product Security Bulletin contains details of security vulnerabilities affecting MediaTek Smartphone, Tablet, AIoT, Smart display, Smart platform, OTT and TV 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, OTT and TV 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-2022-21745
    Medium CVE-2022-21746, CVE-2022-21747, CVE-2022-21748, CVE-2022-21749, CVE-2022-21750, CVE-2022-21751, CVE-2022-21752, CVE-2022-21753, CVE-2022-21754, CVE-2022-21755, CVE-2022-21756, CVE-2022-21757, CVE-2022-21758, CVE-2022-21759, CVE-2022-21760, CVE-2022-21761, CVE-2022-21762

    Details

    CVE CVE-2022-21745
    Title Use after free in WIFI Firmware
    Severity High
    Vulnerability Type EoP
    CWE CWE-416 Use After Free
    Description In WIFI Firmware, there is a possible memory corruption due to a use after free. This could lead to remote escalation of privilege, when devices are connecting to the attacker-controllable Wi-Fi hotspot, with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6761, MT6762, MT6765, MT6768, MT6769, MT6779, MT6781, MT6785, MT6789, MT6833, MT6853, MT6853T, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6889, MT6891, MT6893, MT6895, MT6983, MT6985, MT8167S, MT8168, MT8175, MT8183, MT8185, MT8362A, MT8365, MT8385, MT8667, MT8675, MT8695, MT8696, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 10.0, 11.0, 12.0

    CVE CVE-2022-21746
    Title Improper input validation in imgsensor
    Severity Medium
    Vulnerability Type DoS
    CWE CWE-20 Improper Input Validation
    Description In imgsensor, there is a possible out of bounds read due to a missing bounds check. This could lead to local denial of service with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6771, MT6779, MT6781, MT6785, MT6833, MT6853, MT6873, MT6885, MT6893, MT8167, MT8167S, MT8168, MT8175, MT8362A, MT8365, MT8788
    Affected Software Versions Android 9.0, 10.0, 11.0, 12.0

    CVE CVE-2022-21747
    Title Improper input validation in imgsensor
    Severity Medium
    Vulnerability Type DoS
    CWE CWE-20 Improper Input Validation
    Description In imgsensor, there is a possible out of bounds read due to a missing bounds check. This could lead to local denial of service with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6771, MT6779, MT6781, MT6785, MT6833, MT6853, MT6873, MT6885, MT6893, MT8167, MT8167S, MT8168, MT8173, MT8362A, MT8365, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8797
    Affected Software Versions Android 9.0, 10.0, 11.0, 12.0

    CVE CVE-2022-21748
    Title Improper access control in telephony
    Severity Medium
    Vulnerability Type ID
    CWE CWE-284 Improper Access Control
    Description In telephony, there is a possible information disclosure due to a missing permission check. This could lead to local information disclosure with User execution privileges needed. User interaction is needed for exploitation.
    Affected Chipsets MT6580, MT6735, MT6737, MT6739, MT6753, MT6761, MT6765, MT6768, MT6771, MT6779, MT6781, MT6785, MT6833, MT6853, MT6873, MT6877, MT6879, MT6883, MT6885, MT6889, MT6893, MT6895, MT6983, MT8321, MT8666, MT8675, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-21749
    Title Improper access control in telephony
    Severity Medium
    Vulnerability Type ID
    CWE CWE-284 Improper Access Control
    Description In telephony, there is a possible information disclosure due to a missing permission check. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6739, MT6750, MT6750S, MT6752, MT6753, MT6755, MT6755S, MT6757, MT6757C, MT6757CD, MT6757CH, MT6758, MT6761, MT6762, MT6763, MT6765, MT6768, MT6769, MT6771, MT6779, MT6781, MT6785, MT6789, MT6795, MT6797, MT6799, MT6833, MT6853, MT6853T, MT6873, MT6875, MT6877, MT6879, MT6880, MT6883, MT6885, MT6889, MT6890, MT6891, MT6893, MT6895, MT6983, MT6985, MT8321, MT8666, MT8675, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-21750
    Title Improper input validation in WLAN driver
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In WLAN driver, 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 MT6761, MT6779, MT6781, MT6833, MT6853, MT6873, MT6877, MT6879, MT6883, MT6885, MT6889, MT6893, MT6895, MT6983, MT8167S, MT8168, MT8175, MT8183, MT8185, MT8362A, MT8365, MT8385, MT8667, MT8675, MT8696, MT8766, MT8768, MT8786, MT8788, MT8789, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-21751
    Title Improper input validation in WLAN driver
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In WLAN driver, 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 MT6771, MT8167S, MT8168, MT8175, MT8183, MT8185, MT8362A, MT8365, MT8385, MT8667, MT8675, MT8766, MT8768, MT8786, MT8788, MT8789, MT8797
    Affected Software Versions Android 11.0

    CVE CVE-2022-21752
    Title Improper input validation in WLAN driver
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In WLAN driver, 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, MT6765, MT6768, MT6771, MT6779, MT6781, MT6785, MT6833, MT6853, MT6873, MT6877, MT6879, MT6883, MT6885, MT6889, MT6893, MT6895, MT6983, MT8167S, MT8168, MT8175, MT8183, MT8185, MT8362A, MT8365, MT8385, MT8667, MT8675, MT8695, MT8696, MT8766, MT8768, MT8786, MT8788, MT8789, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-21753
    Title Improper input validation in WLAN driver
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In WLAN driver, 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, MT6765, MT6768, MT6771, MT6779, MT6781, MT6785, MT6833, MT6853, MT6873, MT6877, MT6879, MT6883, MT6885, MT6889, MT6893, MT6895, MT6983, MT8167S, MT8168, MT8175, MT8183, MT8185, MT8362A, MT8365, MT8385, MT8667, MT8675, MT8695, MT8696, MT8766, MT8768, MT8786, MT8788, MT8789, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-21754
    Title Improper input validation in WLAN driver
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-20 Improper Input Validation
    Description In WLAN driver, 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 MT6761, MT6762, MT6765, MT6768, MT6779, MT6781, MT6785, MT6833, MT6853, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6889, MT6891, MT6893, MT6895, MT6983, MT8167S, MT8168, MT8175, MT8183, MT8185, MT8362A, MT8365, MT8385, MT8667, MT8675, MT8695, MT8696, MT8766, MT8768, MT8786, MT8788, MT8789, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-21755
    Title Improper input validation in WLAN driver
    Severity Medium
    Vulnerability Type ID
    CWE CWE-20 Improper Input Validation
    Description In WLAN 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 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, MT6789, MT6795, MT6797, MT6799, MT6833, MT6853, MT6853T, MT6873, MT6875, MT6877, MT6879, MT6880, MT6883, MT6885, MT6889, MT6890, MT6891, MT6893, MT6895, MT8167S, MT8168, MT8175, MT8183, MT8185, MT8362A, MT8365, MT8385, MT8667, MT8675, MT8695, MT8696, MT8766, MT8768, MT8786, MT8788, MT8789, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-21756
    Title Improper input validation in WLAN driver
    Severity Medium
    Vulnerability Type ID
    CWE CWE-20 Improper Input Validation
    Description In WLAN 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 MT6833, MT6853, MT6853T, MT6873, MT6875, MT6877, MT6879, MT6880, MT6883, MT6885, MT6889, MT6890, MT6891, MT6893, MT6895, MT6983, MT6985, MT8167S, MT8168, MT8175, MT8183, MT8185, MT8362A, MT8365, MT8385, MT8667, MT8675, MT8695, MT8696, MT8766, MT8768, MT8786, MT8788, MT8789, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-21757
    Title Uncontrolled resource consumption in WIFI Firmware
    Severity Medium
    Vulnerability Type DoS
    CWE CWE-400 Uncontrolled Resource Consumption
    Description In WIFI Firmware, there is a possible system crash due to a missing count check. This could lead to remote denial of service with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6833, MT6853, MT6877, MT6885, MT6889, MT6983, MT6985, MT8167S, MT8168, MT8175, MT8183, MT8185, MT8362A, MT8365, MT8385, MT8667, MT8675, MT8766, MT8768, MT8786, MT8788, MT8789, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-21758
    Title Double free in ccu
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-415 Double Free
    Description In ccu, there is a possible memory corruption due to a double free. 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
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-21759
    Title Buffer copy without checking size of input ('classic buffer overflow') in power service
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
    Description In power service, 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, MT6765, MT6768, MT6769, MT6771, MT6779, MT6781, MT6785, MT6833, MT6853, MT6873, MT6875, MT6877, MT6879, MT6885, MT6891, MT6893, MT6895, MT6983, MT8167, MT8167S, MT8168, MT8173, MT8185, MT8321, MT8362A, MT8365, MT8385, MT8666, MT8675, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 11.0, 12.0

    CVE CVE-2022-21760
    Title Integer overflow or wraparound in apusys driver
    Severity Medium
    Vulnerability Type DoS
    CWE CWE-190 Integer Overflow or Wraparound
    Description In apusys driver, there is a possible system crash due to an integer overflow. This could lead to local denial of service with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6853, MT6853T, MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT9636, MT9638, MT9666
    Affected Software Versions Android 12.0

    CVE CVE-2022-21761
    Title Integer overflow or wraparound in apusys driver
    Severity Medium
    Vulnerability Type DoS
    CWE CWE-190 Integer Overflow or Wraparound
    Description In apusys driver, there is a possible system crash due to an integer overflow. This could lead to local denial of service with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6853, MT6853T, MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT9636, MT9638, MT9666
    Affected Software Versions Android 11.0

    CVE CVE-2022-21762
    Title Integer overflow or wraparound in apusys driver
    Severity Medium
    Vulnerability Type DoS
    CWE CWE-190 Integer Overflow or Wraparound
    Description In apusys driver, there is a possible system crash due to an integer overflow. This could lead to local denial of service with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6853, MT6853T, MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT9636, MT9638, MT9666
    Affected Software Versions Android 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 June 6, 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.