| CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
|---|---|---|
| 6.9 | $0-$5k | 0.00 |
Summary
A vulnerability marked as critical has been reported in Apple watchOS up to 6.1.1. Impacted is an unknown function of the component ImageIO. This manipulation causes out-of-bounds. This vulnerability is registered as CVE-2020-3878. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.
Details
A vulnerability was found in Apple watchOS up to 6.1.1 (Smartwatch Operating System). It has been declared as critical. Affected by this vulnerability is an unknown code of the component ImageIO. The manipulation with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality, integrity, and availability.
The weakness was published 01/28/2020 with Google Project Zero as HT210921 as confirmed advisory (Website). It is possible to read the advisory at support.apple.com. This vulnerability is known as CVE-2020-3878. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The advisory points out:
An out-of-bounds read was addressed with improved input validation.
Upgrading to version 6.1.2 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.
Similar entries are available at VDB-150571, VDB-150591, VDB-150592 and VDB-150593. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Product
Type
Vendor
Name
Version
License
Website
- Vendor: https://www.apple.com/
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔍VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 7.0VulDB Meta Temp Score: 6.9
VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 7.8
NVD Vector: 🔍
CVSSv2
| AV | AC | Au | C | I | A |
|---|---|---|---|---|---|
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
|---|---|---|---|---|---|
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Out-of-boundsCWE: CWE-125 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍
Physical: Partially
Local: Yes
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
| 0-Day | Unlock | Unlock | Unlock | Unlock |
|---|---|---|---|---|
| Today | Unlock | Unlock | Unlock | Unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Upgrade: watchOS 6.1.2
Timeline
12/18/2019 🔍01/28/2020 🔍
01/28/2020 🔍
02/28/2020 🔍
05/12/2025 🔍
Sources
Vendor: apple.comAdvisory: HT210921
Organization: Google Project Zero
Status: Confirmed
CVE: CVE-2020-3878 (🔍)
GCVE (CVE): GCVE-0-2020-3878
GCVE (VulDB): GCVE-100-150595
See also: 🔍
Entry
Created: 02/28/2020 13:33Updated: 05/12/2025 13:04
Changes: 02/28/2020 13:33 (46), 02/28/2020 13:38 (16), 04/06/2024 13:34 (19), 05/12/2025 13:04 (4)
Complete: 🔍
Cache ID: 216::103
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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