Resource exhaustion in Ruby-Lang Ruby
CVE-2023-22795
A regular expression based DoS vulnerability in Action Dispatch <6.1.7.1 and <7.0.4.1 related to the If-None-Match header. A specially crafted HTTP If-None-Match header can cause the regular expression engine to enter a state of catastrophic backtracking, when on a version of Ruby below 3.2.0. This can cause the process to use large amounts of CPU and memory, leading to a possible DoS vulnerability All users running an affected release should either upgrade or use one of the workarounds immediately.
Vulnerability class: DoS (Denial of Service)
EPSS: 0.023 (82.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Ruby-lang Ruby
- Rubyonrails Rails
- Debian Debian_linux — versions 11.0
- N/a Https://github.com/rails/rails — versions 6.1.7.1, 7.0.4.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- support@hackerone.com (Patch, Vendor Advisory)
- support@hackerone.com (vendor-advisory, Third Party Advisory)
- support@hackerone.com
Frequently asked questions
- What is CVE-2023-22795?
- CVE-2023-22795 is a high-severity vulnerability in Ruby-Lang Ruby, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2023-02-09.
- How severe is CVE-2023-22795?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2023-22795 known to be exploited?
- 8 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.