MT2735, MT2737, MT6761, MT6765, MT6768…: Improper Certificate Validation
CVE-2024-20080 is a critical-severity improper certificate validation vulnerability in MT2735, MT2737, MT6761, MT6765, MT6768, MT6781, MT6785, MT6789, MT6833, MT6853, MT6853T, MT6855, MT6873, MT6875, MT6877, MT6879, MT6880, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6980, MT6983, MT6985, MT6989, MT6990, MT8666, MT8667, MT8673, MT8676, MT8678 from MediaTek, with a CVSS 3.1 base score of 9.8 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. Affected MT2735, MT2737, MT6761, MT6765, MT6768, MT6781, MT6785, MT6789, MT6833, MT6853, MT6853T, MT6855, MT6873, MT6875, MT6877, MT6879, MT6880, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6980, MT6983, MT6985, MT6989, MT6990, MT8666, MT8667, MT8673, MT8676, MT8678 versions: Android 13.0, 14.0 / Yocto 2.6, 3.3, 4.0 / RDK-B 22Q3. The record does not name a fixed version, so check the vendor advisory. There is no confirmed exploitation so far. EPSS estimates a 0.29% chance of exploitation within 30 days, which is low compared with other CVEs.
Critical severity: a successful attack would have severe impact.
What to do
- Check which version of MT2735, MT2737, MT6761, MT6765, MT6768, MT6781, MT6785, MT6789, MT6833, MT6853, MT6853T, MT6855, MT6873, MT6875, MT6877, MT6879, MT6880, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6980, MT6983, MT6985, MT6989, MT6990, MT8666, MT8667, MT8673, MT8676, MT8678 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.
- Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| MediaTek | MT2735, MT2737, MT6761, MT6765, MT6768, MT6781, MT6785, MT6789, MT6833, MT6853, MT6853T, MT6855, MT6873, MT6875, MT6877, MT6879, MT6880, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6980, MT6983, MT6985, MT6989, MT6990, MT8666, MT8667, MT8673, MT8676, MT8678 | Android 13.0, 14.0 / Yocto 2.6, 3.3, 4.0 / RDK-B 22Q3 | Not stated |
| MediaTek | mt2735 | Not specified in the record | Not stated |
| MediaTek | mt2737 | Not specified in the record | Not stated |
| MediaTek | mt6761 | Not specified in the record | Not stated |
| MediaTek | mt6765 | Not specified in the record | Not stated |
| MediaTek | mt6768 | Not specified in the record | Not stated |
| MediaTek | mt6781 | Not specified in the record | Not stated |
| MediaTek | mt6785 | Not specified in the record | Not stated |
| MediaTek | mt6789 | Not specified in the record | Not stated |
| MediaTek | mt6833 | Not specified in the record | Not stated |
| MediaTek | mt6853 | Not specified in the record | Not stated |
| MediaTek | mt6853t | Not specified in the record | Not stated |
| MediaTek | mt6855 | Not specified in the record | Not stated |
| MediaTek | mt6873 | Not specified in the record | Not stated |
| MediaTek | mt6875 | Not specified in the record | Not stated |
| MediaTek | mt6877 | Not specified in the record | Not stated |
| MediaTek | mt6879 | Not specified in the record | Not stated |
| MediaTek | mt6880 | Not specified in the record | Not stated |
| MediaTek | mt6883 | Not specified in the record | Not stated |
| MediaTek | mt6885 | Not specified in the record | Not stated |
| MediaTek | mt6886 | Not specified in the record | Not stated |
| MediaTek | mt6889 | Not specified in the record | Not stated |
| MediaTek | mt6890 | Not specified in the record | Not stated |
| MediaTek | mt6891 | Not specified in the record | Not stated |
| MediaTek | mt6893 | Not specified in the record | Not stated |
Version data comes from the organisation that assigned the CVE; 14 further products are omitted here. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- NetworkCan be exploited remotely over a network, including the internet.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- 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:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. Scored by CISA (ADP).
Official description
In gnss service, there is a possible escalation of privilege due to improper certificate validation. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: ALPS08720039; Issue ID: MSV-1424.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Improper Certificate Validation
The product does not validate, or incorrectly validates, a certificate.
How developers prevent this class of flaw
- Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.
- If certificate pinning is being used, ensure that all relevant properties of the certificate are fully validated before the certificate is pinned, including the hostname.
More Improper Certificate Validation vulnerabilities (CWE-295)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: yes, technical impact: total).
- Record last changed materially (score, affected products, status or references).
References
Recent Improper Certificate Validation vulnerabilities
- 9.8 Critical severity
- 7.4 High severity
- 7.8 High severity
- 8.2 High severity
- 8.8 High severity
- 7.8 High severity
Spotted an error? Tell us.