CVE-2024-39891 Twilio Authy: information leak
In plain words: The program reveals information it should keep private. Leaked secrets — tokens, passwords or memory contents — that help a bigger attack.
Confirmed exploited by CISA on · US federal patch deadline Aug 13, 2024
What to do
- Install Twilio's security update for Authy. 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
- Twilio Authy Information Disclosure Vulnerability
- Product
- Twilio Authy
- CISA description
- Twilio Authy contains an information disclosure vulnerability in its API that allows an unauthenticated endpoint to accept a request containing a phone number and respond with information about whether the phone number was registered with Authy.
- Type of flaw
- Information leak (CWE-203)
- Confirmed exploited
- Jul 23, 2024
- US federal patch deadline
- Aug 13, 2024
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Answering about CVE-2024-39891 ·
Questions about CVE-2024-39891
Is CVE-2024-39891 being exploited?
Yes. CISA added CVE-2024-39891 to its Known Exploited Vulnerabilities catalog on Jul 23, 2024, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2024-39891?
Install Twilio's security update for Authy. 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-2024-39891?
Only if you use Twilio Authy. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.