Skip to content
OpenAdvisories
High USN-6087-1 2 CVEs

ruby2.3, ruby2.5, ruby2.7 vulnerabilities

Published May 18, 2023 · Updated Jun 25, 2026

Summary

It was discovered that Ruby incorrectly handled certain regular expressions.
An attacker could possibly use this issue to cause a denial of service.
(CVE-2023-28755)

It was discovered that Ruby incorrectly handled certain regular expressions.
An attacker could possily use this issue to cause a denial of service.
This issue only affected Ubuntu 16.04 ESM. (CVE-2023-28756)

Fixed packages 3

ReleasePackageFixed in
Ubuntu · 18.04 LTS 18.04:LTS ruby2.5 2.5.1-1ubuntu1.16
Ubuntu · 20.04 LTS 20.04:LTS ruby2.7 2.7.0-5ubuntu1.11
Ubuntu · Pro 16.04 LTS Pro:16.04:LTS ruby2.3 2.3.1-2~ubuntu16.04.16+esm7

Vulnerabilities 2

  • High 7.5

    Ruby Time component ReDoS issue

    A ReDoS issue was discovered in the Time component through 0.2.1 in Ruby through 3.2.1. The Time parser mishandles invalid URLs that have specific characters. It causes an increase in execution time for parsing strings to Time objects. The fixed versions are …

  • Medium 5.3

    Ruby URI component ReDoS issue

    A ReDoS issue was discovered in the URI component through 0.12.0 in Ruby through 3.2.1. The URI parser mishandles invalid URLs that have specific characters. It causes an increase in execution time for parsing strings to URI objects. The fixed versions are 0.…

References

  • report
    https://ubuntu.com/security/CVE-2023-28755
  • report
    https://ubuntu.com/security/CVE-2023-28756