What’s Vulnerable › Vulnerabilities

CVE-2023-28756

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-03-31 · updated 2026-06-17
• Weakness: CWE-1333

Description

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 0.1.1 and 0.2.2.

Affected products

• Debian Linux: 10.0
• Fedoraproject Fedora: 36, 37, 38
• Ruby: through 2.7.7
• ruby-lang Time: 0.1.0, 0.2.1

References

• https://github.com/ruby/time/releases/
• https://lists.debian.org/debian-lts-announce/2023/04/msg00033.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FFZANOQA4RYX7XCB42OO3P24DQKWHEKA/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/G76GZG3RAGYF4P75YY7J7TGYAU7Z5E2T/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WMIOPLBAAM3FEQNAXA2L7BDKOGSVUT5Z/
• https://security.gentoo.org/glsa/202401-27
• https://security.netapp.com/advisory/ntap-20230526-0004/
• https://www.ruby-lang.org/en/downloads/releases/
• https://www.ruby-lang.org/en/news/2022/12/25/ruby-3-2-0-released/
• https://www.ruby-lang.org/en/news/2023/03/30/redos-in-time-cve-2023-28756/
• https://github.com/ruby/time/releases/
• https://lists.debian.org/debian-lts-announce/2023/04/msg00033.html

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