CyberSecBulletin
CVE-2024-20007NVD status: Modified

MT6580, MT6739, MT6761, MT6762, MT6765…: Concurrent Execution using Shared Resource with Improper Synchronization

Published Updated By the CyberSecBulletin desk

CVE-2024-20007 is a high-severity concurrent execution using shared resource with improper synchronization vulnerability in MT6580, MT6739, MT6761, MT6762, MT6765, MT6779, MT6785, MT6789, MT6833, MT6835, MT6853, MT6853T, MT6855, MT6873, MT6877, MT6879, MT6883, MT6885, MT6886, MT6889, MT6895, MT6983, MT6985, MT8321, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797, MT8798 from MediaTek, with a CVSS 3.1 base score of 7.5 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, but only if a user takes part, for example by opening a link or file. Affected MT6580, MT6739, MT6761, MT6762, MT6765, MT6779, MT6785, MT6789, MT6833, MT6835, MT6853, MT6853T, MT6855, MT6873, MT6877, MT6879, MT6883, MT6885, MT6886, MT6889, MT6895, MT6983, MT6985, MT8321, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, 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 0.25% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Check which version of MT6580, MT6739, MT6761, MT6762, MT6765, MT6779, MT6785, MT6789, MT6833, MT6835, MT6853, MT6853T, MT6855, MT6873, MT6877, MT6879, MT6883, MT6885, MT6886, MT6889, MT6895, MT6983, MT6985, MT8321, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797, MT8798 you run against the affected versions below, and install the vendor's latest release.
  2. Read the advisory on corp.mediatek.com for workarounds and exact fixed builds.
  3. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.
  4. Because the attack needs a user to take part, warn users about unexpected links and files related to this product until it is patched.

Affected products and versions

VendorProductAffected versionsFixed in
MediaTekMT6580, MT6739, MT6761, MT6762, MT6765, MT6779, MT6785, MT6789, MT6833, MT6835, MT6853, MT6853T, MT6855, MT6873, MT6877, MT6879, MT6883, MT6885, MT6886, MT6889, MT6895, MT6983, MT6985, MT8321, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797, MT8798Android 12.0, 13.0, 14.0Not stated
GoogleAndroid12.0; 13.0; 14.0Not stated

Version data comes from the organisation that assigned the CVE. 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
HighSuccess depends on conditions outside the attacker's control.
Privileges required
NoneNo account or login is needed.
User interaction
RequiredA user must take an action such as opening a file or link.
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:H/PR:N/UI:R/S:U/C:H/I:H/A:H. Scored by NVD.

Scoring systemScoreSeverityScored by
CVSS 3.17.5HighNVD
CVSS 3.17.5HighCISA (ADP)

Official description

In mp3 decoder, there is a possible out of bounds write due to a race condition. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is needed for exploitation. Patch ID: ALPS08441369; Issue ID: ALPS08441369.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Concurrent Execution using Shared Resource with Improper Synchronization

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

How developers prevent this class of flaw

  • In languages that support it, use synchronization primitives. Only wrap these around critical code to minimize the impact on performance.
  • Use thread-safe capabilities such as the data access abstraction in Spring.
  • Minimize the usage of shared resources in order to remove as much complexity as possible from the control flow and to reduce the likelihood of unexpected conditions occurring. Additionally, this will minimize the amount of synchronization necessary and may even help to reduce the likelihood of a denial of service where an attacker may be able to repeatedly trigger a critical section (CWE-400).

More Concurrent Execution using Shared Resource with Improper Synchronization vulnerabilities (CWE-362)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in MT6580, MT6739, MT6761, MT6762, MT6765, MT6779, MT6785, MT6789, MT6833, MT6835, MT6853, MT6853T, MT6855, MT6873, MT6877, MT6879, MT6883, MT6885, MT6886, MT6889, MT6895, MT6983, MT6985, MT8321, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797, MT8798

All MT6580, MT6739, MT6761, MT6762, MT6765, MT6779, MT6785, MT6789, MT6833, MT6835, MT6853, MT6853T, MT6855, MT6873, MT6877, MT6879, MT6883, MT6885, MT6886, MT6889, MT6895, MT6983, MT6985, MT8321, MT8765, MT8766, MT8768, MT8786, MT8788, MT8789, MT8791, MT8797, MT8798 vulnerabilities

Recent Concurrent Execution using Shared Resource with Improper Synchronization vulnerabilities

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