CVE-2023-41991 Apple Multiple Products: software flaw
In plain words: A mistake in the software that attackers have found a way to abuse. Depends on the product — see the description and the vendor advisory.
Confirmed exploited by CISA on · US federal patch deadline Oct 16, 2023
What to do
- Install Apple's security update for Multiple Products. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Turn on automatic updates for the operating system and for Office, PDF and archive apps.
- Be careful with unexpected attachments — documents, .zip/.rar files and shortcuts are common bait.
- Use a normal (non-admin) account day to day and keep built-in protection like Microsoft Defender on.
Who is affected
Could reach you. This one is aimed at devices or apps of the kind people own.
What's at risk: Your files, saved passwords and accounts. Many of these let a program that is already running gain full administrator control.
The details
- Official name
- Apple Multiple Products Improper Certificate Validation Vulnerability
- Product
- Apple Multiple Products
- CISA description
- Apple iOS, iPadOS, macOS, and watchOS contain an improper certificate validation vulnerability that can allow a malicious app to bypass signature validation.
- Type of flaw
- Software flaw (CWE-295)
- Confirmed exploited
- Sep 25, 2023
- US federal patch deadline
- Oct 16, 2023
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Answering about CVE-2023-41991 ·
Questions about CVE-2023-41991
Is CVE-2023-41991 being exploited?
Yes. CISA added CVE-2023-41991 to its Known Exploited Vulnerabilities catalog on Sep 25, 2023, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2023-41991?
Install Apple's security update for Multiple Products. If no update exists, follow the vendor's workaround or stop using the product until one ships. Turn on automatic updates for the operating system and for Office, PDF and archive apps.
Am I affected by CVE-2023-41991?
Only if you use Apple Multiple Products. This one is aimed at devices or apps of the kind people own.