Mbed TLS Server Vulnerability Could Lead to Denial of Service or Forced Version Downgrade
CVE-2024-28755

6.5MEDIUM

Key Information:

Vendor

Mbed TLS

Status
Mbed Tls
Vendor
CVE Published:
3 April 2024

What is CVE-2024-28755?

An issue was discovered in Mbed TLS 3.5.x before 3.6.0. When an SSL context was reset with the mbedtls_ssl_session_reset() API, the maximum TLS version to be negotiated was not restored to the configured one. An attacker was able to prevent an Mbed TLS server from establishing any TLS 1.3 connection, potentially resulting in a Denial of Service or forced version downgrade from TLS 1.3 to TLS 1.2.

References

https://mbed-tls.readthedocs.io/en/latest/tech-updates/se...
https://hey3e.github.io
https://github.com/hey3e

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

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