Auth bypass in Ruby-Lang Ruby
CVE-2019-16201
WEBrick::HTTPAuth::DigestAuth in Ruby through 2.4.7, 2.5.x through 2.5.6, and 2.6.x through 2.6.4 has a regular expression Denial of Service cause by looping/backtracking. A victim must expose a WEBrick server that uses DigestAuth to the Internet or a untrusted network.
Vulnerability class: Broken Authentication
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.051 (92.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 92.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.051 · newest: 0.051 · change: 0.000
Affected products
- Ruby-Lang Ruby
- Debian Linux — versions 8.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- hackerone.com/reports/661722 (Third Party Advisory)
- lists.debian.org/debian-lts-announce/2019/11/msg00025.html (Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2019/12/msg00009.html (mailing-list)
- seclists.org/bugtraq/2019/Dec/31 (mailing-list)
- seclists.org/bugtraq/2019/Dec/32 (mailing-list)
- www.debian.org/security/2019/dsa-4587 (vendor-advisory)
- www.oracle.com/security-alerts/cpujan2020.html
- security.gentoo.org/glsa/202003-06 (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2020-03/msg00041.html (vendor-advisory)
- lists.debian.org/debian-lts-announce/2020/08/msg00027.html (mailing-list)
Frequently asked questions
- What is CVE-2019-16201?
- CVE-2019-16201 is a high-severity vulnerability in Ruby-Lang Ruby, classified under Improper Authentication. CVSS score: 7.5/10. Published 2019-11-26.
- How severe is CVE-2019-16201?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2019-16201 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.