CVE-2018-0739

Advisory lineage Upstream: 0 Downstream: 28
Modified
Published: 27 Mar 2018, 21:00
Last modified:16 Sept 2024, 22:35

Vulnerability Summary

Overall Risk (default)
medium
29/100
CVSS Score
6.5 MEDIUM
v3.0 (nvd)
EPSS Score
14.45% MEDIUM
14% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

27 Mar 2018, 21:00
Published
Vulnerability first disclosed
16 Sept 2024, 22:35
Last Modified
Vulnerability information updated

Description

Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually exceed the stack given malicious input with excessive recursion. This could result in a Denial Of Service attack. There are no such structures used within SSL/TLS that come from untrusted sources so this is considered safe. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g). Fixed in OpenSSL 1.0.2o (Affected 1.0.2b-1.0.2n).

CVSS Metrics

  • v3.0•MEDIUM•Score: 6.5CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
  • v2.0•MEDIUM•Score: 4.3AV:N/AC:M/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 14.45%• Percentile: 95%

Techniques & Countermeasures

  • CWE-674•Uncontrolled Recursion

    The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.

Affected Systems

  • canonical•ubuntu_linux

    14.04 | 16.04 | 17.10

  • debian•debian_linux

    7.0 | 8.0 | 9.0

  • Unknown•OpenSSL

    ≥ 1.0.2b, ≤ 1.0.2n | ≥ 1.1.0, ≤ 1.1.0g | Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g) | Fixed in OpenSSL 1.0.2o (Affected 1.0.2b-1.0.2n)

References (34)