Vulnerability in Ruby-Lang Ruby
CVE-2023-28756
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.
Vulnerability class: ReDoS (Regular Expression Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.025 (83.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 84th percentile — 83.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.025 · newest: 0.025 · change: 0.000
Affected products
- Ruby-Lang Ruby
- Ruby-Lang Time — versions 0.1.0, 0.2.1
- Debian Linux — versions 10.0
- Fedoraproject Fedora — versions 36, 37, 38
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.ruby-lang.org/en/news/2022/12/25/ruby-3-2-0-released/ (Release Notes)
- www.ruby-lang.org/en/downloads/releases/ (Release Notes)
- github.com/ruby/time/releases/ (Release Notes)
- www.ruby-lang.org/en/news/2023/03/30/redos-in-time-cve-2023-28756/ (Vendor Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.debian.org/debian-lts-announce/2023/04/msg00033.html (mailing-list, Mailing List, Third Party Advisory)
- security.netapp.com/advisory/ntap-20230526-0004/ (Third Party Advisory)
- security.gentoo.org/glsa/202401-27 (vendor-advisory)
Frequently asked questions
- What is CVE-2023-28756?
- CVE-2023-28756 is a medium-severity vulnerability in Ruby-Lang Ruby, classified under Inefficient Regular Expression Complexity. CVSS score: 5.3/10. Published 2023-03-31.
- How severe is CVE-2023-28756?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2023-28756 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.