6.5

CVE-2024-28755: trustedfirmware mbed_tls Inadequate Encryption Strength

CVSS: 6.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2024-28755DEBIAN-CVE-2024-28755
Published 03-04-2024Last modified 06-09-2024
Open JSON

Vulnerability summary

CVE-2024-28755 is a medium (CVSS 6.5) Inadequate Encryption Strength vulnerability in trustedfirmware mbed_tls. EPSS estimates a 0.41% chance of exploitation in the next 30 days, higher than 33.5% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.41%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 03-04-2024
    PublishedVulnerability first disclosed.
  2. 06-09-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.41%

Chance of exploitation in the next 30 days

Percentile

34%

Versus all other CVEs

30-day change

0.00 pp

From 0.41% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.41%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • mbedtlsAll versions (No fix recorded) | < 3.6.0-3
Trustedfirmware1 product
Ubuntu1 product
  • mbedtlsAll versions (No fix recorded)

3 vendors · 3 products

References

7 links