CVE-2024-39891

Summary

In the Twilio Authy API, accessed by Authy Android before 25.1.0 and Authy iOS before 26.1.0, an unauthenticated endpoint provided access to certain phone-number data, as exploited in the wild in June 2024. Specifically, the endpoint accepted a stream of requests containing phone numbers, and responded with information about whether each phone number was registered with Authy. (Authy accounts were not compromised, however.)

Affected Software

Weaknesses

• n/a

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: active
  • Automatable: yes
  • Technical Impact: partial

Additional References

• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-39891

CVE Program Container

Additional References

• https://cwe.mitre.org/data/definitions/203.html
• https://www.twilio.com/docs/usage/security/reporting-vulnerabilities
• https://www.twilio.com/en-us/changelog
• https://www.bleepingcomputer.com/news/security/hackers-abused-api-to-verify-millions-of-authy-mfa-phone-numbers/

References

• https://cwe.mitre.org/data/definitions/203.html
• https://www.twilio.com/docs/usage/security/reporting-vulnerabilities
• https://www.twilio.com/en-us/changelog
• https://www.bleepingcomputer.com/news/security/hackers-abused-api-to-verify-millions-of-authy-mfa-phone-numbers/

• ←Previous
• Next→