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 severity of the identified vulnerabilities was conducted based on the Common Vulnerability Scoring System version 3.1 (CVSS v3.1).
Summary
Details
| CVE | CVE-2021-0675 |
|---|---|
| Title | Improper restriction of operations within the bounds of a memory buffer in alac decoder |
| Severity | High |
| Vulnerability Type | EoP |
| CWE | CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer |
| Description | In alac decoder, there is a possible out of bounds write due to an incorrect 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 | MT6570, MT6580, MT6735, MT6737, MT6739, MT6750, MT6750S, MT6753, MT6755, MT6755S, MT6757, MT6757C, MT6757CD, MT6757CH, MT6758, MT6761, MT6763, MT6765, MT6768, MT6771, MT6779, MT6781, MT6785, MT6797, MT6799, MT6833, MT6853, MT6853T, MT6873, MT6877, MT6883, MT6885, MT6889, MT6893, MT8163, MT8167, MT8167S, MT8168, MT8173, MT8175, MT8176, MT8183, MT8185, MT8195, MT8321, MT8362A, MT8365, MT8385, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797 |
| Affected Software Versions | Android 8.1, 9.0, 10.0, 11.0 |
| CVE | CVE-2021-0904 |
|---|---|
| Title | Incorrect permission assignment for critical resource in SRAMROM |
| Severity | High |
| Vulnerability Type | EoP |
| CWE | CWE-732 Incorrect Permission Assignment for Critical Resource |
| Description | In SRAMROM, there is a possible permission bypass due to an insecure permission setting. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. |
| Affected Chipsets | MT6771, MT8183, MT8385, MT8788 |
| Affected Software Versions | Android 8.1, 9.0, 10.0, 11.0 |
| CVE | CVE-2021-0676 |
|---|---|
| Title | Exposure of sensitive information to an unauthorized actor in geniezone driver |
| Severity | Medium |
| Vulnerability Type | ID |
| CWE | CWE-200 Exposure of Sensitive Information to an Unauthorized Actor |
| Description | In geniezone 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 | MT6762, MT6765, MT6768, MT6769, MT6771, MT6779, MT6781, MT6785, 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, MT8771, MT8786, MT8788, MT8789, MT8791, MT8797 |
| Affected Software Versions | Android 8.1, 9.0, 10.0, 11.0 |
| CVE | CVE-2021-0677 |
|---|---|
| Title | Integer overflow or wraparound in ccu driver |
| Severity | Medium |
| Vulnerability Type | ID |
| CWE | CWE-190 Integer Overflow or Wraparound |
| Description | In ccu driver, there is a possible out of bounds read 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 | MT6833, MT6853, MT6873, MT6877, MT6885, MT6889, MT8771, MT8791 |
| Affected Software Versions | Android 11.0 |
| CVE | CVE-2021-0678 |
|---|---|
| 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, 12.0 |
| CVE | CVE-2021-0679 |
|---|---|
| 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 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, 12.0 |
| CVE | CVE-2021-0893 |
|---|---|
| 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, MT8195, MT8791, MT8797 |
| Affected Software Versions | Android 10.0, 11.0, 12.0 |
| CVE | CVE-2021-0894 |
|---|---|
| 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, 12.0 |
| CVE | CVE-2021-0895 |
|---|---|
| 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, 12.0 |
| CVE | CVE-2021-0896 |
|---|---|
| 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, 12.0 |
| CVE | CVE-2021-0897 |
|---|---|
| Title | Time-of-check time-of-use (toctou) race condition in apusys |
| Severity | Medium |
| Vulnerability Type | EoP |
| CWE | CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition |
| 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, 12.0 |
| CVE | CVE-2021-0898 |
|---|---|
| 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, MT8195, MT8791, MT8797 |
| Affected Software Versions | Android 10.0, 11.0, 12.0 |
| CVE | CVE-2021-0899 |
|---|---|
| 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, MT8195, MT8791, MT8797 |
| Affected Software Versions | Android 10.0, 11.0, 12.0 |
| CVE | CVE-2021-0900 |
|---|---|
| Title | Improper input validation in apusys |
| Severity | Medium |
| Vulnerability Type | ID |
| CWE | CWE-20 Improper Input Validation |
| 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 |
| Affected Software Versions | Android 10.0, 11.0, 12.0 |
| CVE | CVE-2021-0901 |
|---|---|
| Title | Integer overflow or wraparound in apusys |
| Severity | Medium |
| Vulnerability Type | EoP |
| CWE | CWE-190 Integer Overflow or Wraparound |
| 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 | MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT8195, MT8791, MT8797 |
| Affected Software Versions | Android 10.0, 11.0, 12.0 |
| CVE | CVE-2021-0902 |
|---|---|
| Title | Improper input validation in apusys |
| Severity | Medium |
| Vulnerability Type | ID |
| CWE | CWE-20 Improper Input Validation |
| 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 |
| Affected Software Versions | Android 10.0, 11.0, 12.0 |
| CVE | CVE-2021-0903 |
|---|---|
| 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, 12.0 |
| CVE | CVE-2021-0673 |
|---|---|
| Title | Improper input validation in Audio Aurisys HAL |
| Severity | Medium |
| Vulnerability Type | EoP |
| CWE | CWE-20 Improper Input Validation |
| Description | In Audio Aurisys HAL, 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 | MT6779, MT6781, MT6785, MT6853, MT6853T, MT6873, MT6875, MT6877, MT6883, MT6885, MT6889, MT6891, MT6893, MT8183, MT8185, MT8195, MT8321, MT8385, MT8765, MT8766, MT8768, MT8771, MT8786, MT8788, MT8789, MT8791, MT8797 |
| Affected Software Versions | Android 10.0, 11.0, 12.0 |
| CVE | CVE-2021-0674 |
|---|---|
| Title | Improper input validation in alac decoder |
| Severity | Medium |
| Vulnerability Type | ID |
| CWE | CWE-20 Improper Input Validation |
| Description | In alac decoder, there is a possible out of bounds read 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 | MT6570, MT6580, MT6735, MT6737, MT6739, MT6750, MT6750S, MT6753, MT6755, MT6755S, MT6757, MT6757C, MT6757CD, MT6757CH, MT6758, MT6761, MT6763, MT6765, MT6768, MT6771, MT6779, MT6781, MT6785, MT6797, MT6799, MT6833, MT6853, MT6853T, MT6873, MT6877, MT6883, MT6885, MT6889, MT6893, MT8163, MT8167, MT8167S, MT8168, MT8173, MT8175, MT8176, MT8183, MT8185, MT8195, MT8321, MT8362A, MT8365, MT8385, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797 |
| Affected Software Versions | Android 8.1, 9.0, 10.0, 11.0 |
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 1, 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.
If you want to report a security vulnerability in MediaTek chipsets or products, please go to Report Security Vulnerability page on MediaTek website.