Vulnerability · Published Apr 3, 2024 · Assigned by mitre
CVE-2024-28755
Medium 6.5
In plain English
A medium-severity security flaw in the mbedtls package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | mbedtls | no fix listed | DEBIAN-CVE-2024-28755 |
| Debian:13 | mbedtls | 3.6.0-3 | DEBIAN-CVE-2024-28755 |
| Debian:14 | mbedtls | 3.6.0-3 | DEBIAN-CVE-2024-28755 |
| Ubuntu:22.04:LTS | mbedtls | no fix listed | UBUNTU-CVE-2024-28755 |
| Ubuntu:24.04:LTS | mbedtls | no fix listed | UBUNTU-CVE-2024-28755 |
Affected products (as reported)
Weakness: CWE-326 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L