MT6739, MT6753, MT6757, MT6761, MT6762…: Authentication Bypass by Primary Weakness
CVE-2024-20015 is a high-severity authentication bypass by primary weakness vulnerability in MT6739, MT6753, MT6757, MT6761, MT6762, MT6763, MT6765, MT6768, MT6769, MT6781, MT6833, MT6835, MT6853, MT6855, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6983, MT6985, MT8321, MT8667, MT8673, MT8765, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791T, MT8797, MT8798 from MediaTek, with a CVSS 3.1 base score of 7.8 out of 10. It can be exploited with local access to the system by an attacker with a low-privileged account, without any action from a user. Affected MT6739, MT6753, MT6757, MT6761, MT6762, MT6763, MT6765, MT6768, MT6769, MT6781, MT6833, MT6835, MT6853, MT6855, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6983, MT6985, MT8321, MT8667, MT8673, MT8765, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791T, MT8797, MT8798 versions: Android 12.0, 13.0, 14.0. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.1% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of MT6739, MT6753, MT6757, MT6761, MT6762, MT6763, MT6765, MT6768, MT6769, MT6781, MT6833, MT6835, MT6853, MT6855, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6983, MT6985, MT8321, MT8667, MT8673, MT8765, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791T, MT8797, MT8798 you run against the affected versions below, and install the vendor's latest release.
- Read the advisory on corp.mediatek.com for workarounds and exact fixed builds.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| MediaTek | MT6739, MT6753, MT6757, MT6761, MT6762, MT6763, MT6765, MT6768, MT6769, MT6781, MT6833, MT6835, MT6853, MT6855, MT6873, MT6875, MT6877, MT6879, MT6883, MT6885, MT6886, MT6889, MT6893, MT6895, MT6983, MT6985, MT8321, MT8667, MT8673, MT8765, MT8766, MT8768, MT8781, MT8786, MT8788, MT8789, MT8791T, MT8797, MT8798 | Android 12.0, 13.0, 14.0 | Not stated |
| MediaTek | mt6739 | android_12.0 through android_14.0 | Not stated |
| MediaTek | mt6753 | android_12.0 through android_14.0 | Not stated |
| MediaTek | mt6757 | android_12.0 through android_14.0 | Not stated |
| MediaTek | mt6761 | android_12.0 through android_14.0 | Not stated |
| MediaTek | mt6762 | android_12.0 through android_14.0 | Not stated |
| MediaTek | mt6763 | android_12.0 through android_14.0 | Not stated |
| MediaTek | mt6765 | android_12.0 through android_14.0 | Not stated |
| MediaTek | mt6768 | android_12.0 through android_14.0 | Not stated |
| MediaTek | mt6769 | android_12.0 through android_14.0 | Not stated |
| MediaTek | mt6781 | android_12.0 through android_14.0 | Not stated |
| MediaTek | mt6833 | android_12.0 through android_14.0 | Not stated |
| MediaTek | mt6835 | android_12.0 through android_14.0 | Not stated |
| MediaTek | mt6853 | android_12.0 through android_14.0 | Not stated |
| MediaTek | mt6855 | android_12.0 through android_14.0 | Not stated |
| MediaTek | mt6873 | android_12.0 through android_14.0 | Not stated |
| MediaTek | mt6875 | android_12.0 through android_14.0 | Not stated |
| MediaTek | mt6877 | android_12.0 through android_14.0 | Not stated |
| MediaTek | mt6879 | android_12.0 through android_14.0 | Not stated |
| MediaTek | mt6883 | android_12.0 through android_14.0 | Not stated |
| MediaTek | mt6885 | android_12.0 through android_14.0 | Not stated |
| MediaTek | mt6886 | android_12.0 through android_14.0 | Not stated |
| MediaTek | mt6889 | android_12.0 through android_14.0 | Not stated |
| MediaTek | mt6893 | android_12.0 through android_14.0 | Not stated |
| MediaTek | mt6895 | android_12.0 through android_14.0 | Not stated |
Version data comes from the organisation that assigned the CVE; 16 further products are omitted here. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- LocalThe attacker needs local access or must trick a user into running something.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 7.8 | High | NVD |
| CVSS 3.1 | 7.4 | High | CISA (ADP) |
Official description
In telephony, there is a possible escalation of privilege due to a permissions bypass. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS08441419; Issue ID: ALPS08441419.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Authentication Bypass by Primary Weakness
The authentication algorithm is sound, but the implemented mechanism can be bypassed as the result of a separate weakness that is primary to the authentication error.
More Authentication Bypass by Primary Weakness vulnerabilities (CWE-305)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Recent Authentication Bypass by Primary Weakness vulnerabilities
- 7.7 High severity
- 8.8 High severity
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