CVE-2023-44487 IETF HTTP/2: 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 31, 2023
What to do
- Install IETF's security update for HTTP/2. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Keep a list of every internet-facing server you run so nothing is forgotten.
- Patch anything in this catalog first, ahead of normal patch cycles.
- Put admin and file-transfer apps behind a VPN or single sign-on instead of the open internet.
Who is affected
Work IT. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.
What's at risk: Mass data theft and ransomware: a single flaw in a file-transfer or email server has exposed thousands of organisations at once.
The details
- Official name
- HTTP/2 Rapid Reset Attack Vulnerability
- Product
- IETF HTTP/2
- CISA description
- HTTP/2 contains a rapid reset vulnerability that allows for a distributed denial-of-service attack (DDoS).
- Type of flaw
- Software flaw (CWE-400)
- Confirmed exploited
- Oct 10, 2023
- US federal patch deadline
- Oct 31, 2023
Ask Cleus about it
Ask about a vulnerability, an update, a weird message, or the news. Plain-word answers, free, no account.
Answering about CVE-2023-44487 ·
Questions about CVE-2023-44487
Is CVE-2023-44487 being exploited?
Yes. CISA added CVE-2023-44487 to its Known Exploited Vulnerabilities catalog on Oct 10, 2023, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2023-44487?
Install IETF's security update for HTTP/2. If no update exists, follow the vendor's workaround or stop using the product until one ships. Keep a list of every internet-facing server you run so nothing is forgotten.
Am I affected by CVE-2023-44487?
Only if you use IETF HTTP/2. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.