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    November 2021
    Product Security Bulletin

    Published 2021-11-11

    The MediaTek Product Security Bulletin contains details of security vulnerabilities affecting MediaTek Smartphone, Tablet, AIoT, Smart display 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 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-2021-0672
    Medium CVE-2021-0619, CVE-2021-0620, CVE-2021-0621, CVE-2021-0622, CVE-2021-0623, CVE-2021-0624, CVE-2021-0629, CVE-2021-0655, CVE-2021-0656, CVE-2021-0657, CVE-2021-0658, CVE-2021-0659, CVE-2021-0664, CVE-2021-0665, CVE-2021-0666, CVE-2021-0667, CVE-2021-0668, CVE-2021-0669, CVE-2021-0670, CVE-2021-0671

    Details

    CVE CVE-2021-0672
    Title Exposure of sensitive information to an unauthorized actor in Browser app
    Severity High
    Vulnerability Type ID
    CWE CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
    Description In Browser app, 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 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, MT8163, MT8167, MT8167S, MT8168, MT8173, MT8175, MT8183, MT8185, MT8195, MT8321, MT8362A, MT8365, MT8385, MT8735A, MT8735B, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 8.1, 9.0, 10.0, 11.0
    CVE CVE-2021-0619
    Title Out-of-bounds read in ape extractor
    Severity Medium
    Vulnerability Type ID
    CWE CWE-125 Out-of-bounds Read
    Description In ape extractor, there is a possible out of bounds read due to a missing bounds check. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6739, MT6758, MT6761, MT6762, MT6763, MT6765, MT6768, MT6769, MT6771, MT6779, MT6785, MT6795, MT6797, MT6799, MT6833, MT6853, MT6853T, MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT8163, MT8167, MT8167S, MT8168, MT8173, MT8175, MT8183, MT8185, MT8195, MT8321, MT8362A, MT8365, MT8385, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 10.0, 11.0
    CVE CVE-2021-0620
    Title Out-of-bounds read in asf extractor
    Severity Medium
    Vulnerability Type ID
    CWE CWE-125 Out-of-bounds Read
    Description In asf extractor, there is a possible out of bounds read due to a heap buffer overflow. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT5522, MT5527, MT5597, MT5598, MT5599, MT6580, MT6735, MT6737, MT6739, MT6750S, MT6753, MT6755S, MT6757, MT6757C, MT6757CD, MT6757CH, MT6761, MT6762, MT6763, MT6765, MT6768, MT6771, MT6779, MT6785, MT6833, MT6853, MT6853T, MT6873, MT6877, MT6885, MT6889, MT6893, MT8163, MT8167, MT8167S, MT8168, MT8173, MT8175, MT8183, MT8185, MT8195, MT8321, MT8362A, MT8365, MT8385, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797, MT9256, MT9285, MT9286, MT9288, MT9629, MT9631, MT9632, MT9636, MT9638, MT9639, MT9650, MT9652, MT9669, MT9670, MT9675, MT9685, MT9686, MT9688, MT9931, MT9950, MT9970, MT9980, MT9981
    Affected Software Versions Android 10.0, 11.0
    CVE CVE-2021-0621
    Title Out-of-bounds read in asf extractor
    Severity Medium
    Vulnerability Type ID
    CWE CWE-125 Out-of-bounds Read
    Description In asf extractor, there is a possible out of bounds read due to an integer overflow. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT5522, MT5527, MT5597, MT5598, MT5599, MT6580, MT6735, MT6737, MT6739, MT6750S, MT6753, MT6755S, MT6757, MT6757C, MT6757CD, MT6757CH, MT6761, MT6762, MT6763, MT6765, MT6768, MT6771, MT6779, MT6785, MT6833, MT6853, MT6853T, MT6873, MT6877, MT6885, MT6889, MT6893, MT8163, MT8167, MT8167S, MT8168, MT8173, MT8175, MT8183, MT8184, MT8185, MT8195, MT8321, MT8362A, MT8365, MT8385, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797, MT9256, MT9285, MT9286, MT9288, MT9629, MT9631, MT9632, MT9636, MT9638, MT9639, MT9650, MT9652, MT9669, MT9670, MT9675, MT9685, MT9686, MT9688, MT9931, MT9950, MT9970, MT9980, MT9981
    Affected Software Versions Android 10.0, 11.0
    CVE CVE-2021-0622
    Title Out-of-bounds read in asf extractor
    Severity Medium
    Vulnerability Type ID
    CWE CWE-125 Out-of-bounds Read
    Description In asf extractor, there is a possible out of bounds read due to a heap buffer overflow. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT5522, MT5527, MT5597, MT5598, MT5599, MT6580, MT6735, MT6737, MT6739, MT6750S, MT6753, MT6755S, MT6757, MT6757C, MT6757CD, MT6757CH, MT6761, MT6762, MT6763, MT6765, MT6768, MT6771, MT6779, MT6785, MT6833, MT6853, MT6853T, MT6873, MT6877, MT6885, MT6889, MT6893, MT8163, MT8167, MT8167S, MT8168, MT8173, MT8175, MT8183, MT8185, MT8195, MT8321, MT8362A, MT8365, MT8385, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797, MT9256, MT9285, MT9286, MT9288, MT9629, MT9631, MT9632, MT9636, MT9638, MT9639, MT9650, MT9652, MT9669, MT9670, MT9675, MT9685, MT9686, MT9688, MT9931, MT9950, MT9970, MT9980, MT9981
    Affected Software Versions Android 10.0, 11.0
    CVE CVE-2021-0623
    Title Out-of-bounds read in asf extractor
    Severity Medium
    Vulnerability Type ID
    CWE CWE-125 Out-of-bounds Read
    Description In asf extractor, there is a possible out of bounds read due to an integer overflow. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT5522, MT5527, MT5597, MT5598, MT5599, MT6580, MT6735, MT6737, MT6739, MT6750S, MT6753, MT6755S, MT6757, MT6757C, MT6757CD, MT6757CH, MT6761, MT6762, MT6763, MT6765, MT6768, MT6771, MT6779, MT6785, MT6833, MT6853, MT6853T, MT6873, MT6877, MT6885, MT6889, MT6893, MT8163, MT8167, MT8167S, MT8168, MT8173, MT8175, MT8183, MT8185, MT8186, MT8195, MT8321, MT8362A, MT8365, MT8385, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797, MT9256, MT9285, MT9286, MT9288, MT9629, MT9631, MT9632, MT9636, MT9638, MT9639, MT9650, MT9652, MT9669, MT9670, MT9675, MT9685, MT9686, MT9688, MT9931, MT9950, MT9970, MT9980, MT9981
    Affected Software Versions Android 10.0, 11.0
    CVE CVE-2021-0624
    Title Out-of-bounds read in flv extractor
    Severity Medium
    Vulnerability Type ID
    CWE CWE-125 Out-of-bounds Read
    Description In flv extractor, there is a possible out of bounds read due to a heap buffer overflow. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6580, MT6735, MT6737, MT6739, MT6750S, MT6753, MT6755S, MT6757, MT6757C, MT6757CD, MT6757CH, MT6761, MT6762, MT6763, MT6765, MT6768, MT6771, MT6779, MT6785, MT6833, MT6853, MT6853T, MT6873, MT6877, MT6885, MT6889, MT6893, MT8163, MT8167, MT8167S, MT8168, MT8173, MT8175, MT8183, MT8185, MT8195, MT8321, MT8362A, MT8365, MT8385, MT8735A, MT8735B, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797
    Affected Software Versions Android 10.0, 11.0

    CVE CVE-2021-0629
    Title Improper restriction of operations within the bounds of a memory buffer in mdlactl driver
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
    Description In mdlactl driver, there is a possible memory corruption 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 MT6873, MT6875, MT6883, MT6885, MT6889, MT6891, MT6893, MT8195, MT8791, MT8797, MT9636, MT9638, MT9639, MT9650, MT9652, MT9669, MT9686, MT9970, MT9980, MT9981
    Affected Software Versions Android 10.0, 11.0
    CVE CVE-2021-0655
    Title Improper restriction of operations within the bounds of a memory buffer in mdlactl driver
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
    Description In mdlactl 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 MT6873, MT6875, MT6883, MT6885, MT6889, MT6891, MT6893
    Affected Software Versions Android 10.0, 11.0
    CVE CVE-2021-0656
    Title Use after free in edma driver
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-416 Use After Free
    Description In edma driver, there is a possible memory corruption 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 MT6853, MT6853T, MT6873, MT6877, MT6883, MT6885, MT6889, MT6893, MT8195, MT8791, MT8797
    Affected Software Versions Android 10.0, 11.0
    CVE CVE-2021-0657
    Title Stack-based buffer overflow in apusys
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-121 Stack-based Buffer Overflow
    Description In apusys, 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 MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT8195, MT8791, MT8797
    Affected Software Versions Android 10.0

    CVE CVE-2021-0658
    Title Improper restriction of operations within the bounds of a memory buffer in apusys
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
    Description In apusys, 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 MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT8195, MT8791, MT8797
    Affected Software Versions Android 10.0, 11.0
    CVE CVE-2021-0659
    Title Out-of-bounds read in apusys
    Severity Medium
    Vulnerability Type ID
    CWE CWE-125 Out-of-bounds Read
    Description In apusys, 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 MT6853, MT6853T, MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT8195, MT8791, MT8797
    Affected Software Versions Android 10.0, 11.0
    CVE CVE-2021-0664
    Title Improper restriction of operations within the bounds of a memory buffer in ccu
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
    Description In ccu, there is a possible memory corruption 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 MT6765, MT6768, MT6771, MT6779, MT6785, MT6833, MT6853, MT6873, MT6877, MT6885, MT6889, MT8183, MT8385, MT8768, MT8788
    Affected Software Versions Android 10.0, 11.0
    CVE CVE-2021-0665
    Title Out-of-bounds read in apusys
    Severity Medium
    Vulnerability Type ID
    CWE CWE-125 Out-of-bounds Read
    Description In apusys, 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 MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT8195, MT8791, MT8797, MT9636, MT9638, MT9639, MT9650, MT9652, MT9669, MT9686, MT9970, MT9980, MT9981
    Affected Software Versions Android 10.0
    CVE CVE-2021-0666
    Title Out-of-bounds read in apusys
    Severity Medium
    Vulnerability Type ID
    CWE CWE-125 Out-of-bounds Read
    Description In apusys, 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 MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT8195, MT8791, MT8797, MT9636, MT9638, MT9639, MT9650, MT9652, MT9669, MT9686, MT9970, MT9980, MT9981
    Affected Software Versions Android 11.0
    CVE CVE-2021-0667
    Title Use after free in apusys
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-416 Use After Free
    Description In apusys, there is a possible memory corruption 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 MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT9636, MT9638, MT9639, MT9650, MT9652, MT9669, MT9686, MT9970, MT9980, MT9981
    Affected Software Versions Android 10.0, 11.0
    CVE CVE-2021-0668
    Title Improper check or handling of exceptional conditions in apusys
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-703 Improper Check or Handling of Exceptional Conditions
    Description In apusys, there is a possible memory corruption due to incorrect error handling. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.
    Affected Chipsets MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT9636, MT9638, MT9639, MT9650, MT9652, MT9669, MT9686, MT9970, MT9980, MT9981
    Affected Software Versions Android 10.0, 11.0
    CVE CVE-2021-0669
    Title Use after free in apusys
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-416 Use After Free
    Description In apusys, there is a possible memory corruption 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 MT6853, MT6853T, MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT8195, MT8791, MT8797, MT9636, MT9638, MT9639, MT9650, MT9652, MT9669, MT9686, MT9970, MT9980, MT9981
    Affected Software Versions Android 10.0, 11.0
    CVE CVE-2021-0670
    Title Improper restriction of operations within the bounds of a memory buffer in apusys
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
    Description In apusys, there is a possible memory corruption 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 MT6853, MT6853T, MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT8195, MT8791, MT8797
    Affected Software Versions Android 10.0, 11.0
    CVE; CVE-2021-0671
    Title Improper restriction of operations within the bounds of a memory buffer in apusys
    Severity Medium
    Vulnerability Type EoP
    CWE CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
    Description In apusys, 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 MT6853, MT6853T, MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT8195, MT8791, MT8797
    Affected Software Versions Android 10.0

    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 November 11, 2021 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.