CVE-2018-0732

Advisory lineage Upstream: 0 Downstream: 32
Modified
Published: 12 Jun 2018, 13:00
Last modified:17 Sept 2024, 02:11

Vulnerability Summary

Overall Risk (default)
medium
46/100
CVSS Score
7.5 HIGH
v3.1 (nvd)
EPSS Score
78.38% CRITICAL
78% probability -2.71%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

12 Jun 2018, 13:00
Published
Vulnerability first disclosed
17 Sept 2024, 02:11
Last Modified
Vulnerability information updated

Description

During key agreement in a TLS handshake using a DH(E) based ciphersuite a malicious server can send a very large prime value to the client. This will cause the client to spend an unreasonably long period of time generating a key for this prime resulting in a hang until the client has finished. This could be exploited in a Denial Of Service attack. Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2-1.0.2o).

CVSS Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • v2.0•MEDIUM•Score: 5AV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 78.38%• Percentile: 99%

Techniques & Countermeasures

  • CWE-320•Key Management Errors

    Weaknesses in this category are related to errors in the management of cryptographic keys.

Affected Systems

  • canonical•ubuntu_linux

    12.04 | 14.04 | 16.04 | 17.10 | 18.04

  • debian•debian_linux

    8.0

  • nodejs•node.js

    ≥ 6.0.0, < 6.8.1 | ≥ 6.9.0, < 6.14.4 | ≥ 8.0.0, < 8.8.1 | ≥ 8.9.0, < 8.11.4 | ≥ 10.0.0, < 10.9.0

  • Unknown•OpenSSL

    ≥ 1.0.2, ≤ 1.0.2o | ≥ 1.1.0, ≤ 1.1.0h | Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h) | Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2-1.0.2o)

References (37)