Improper input validation in Envoyproxy Envoy
CVE-2023-27491
Envoy is an open source edge and service proxy designed for cloud-native applications. Compliant HTTP/1 service should reject malformed request lines. Prior to versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9, There is a possibility that non compliant HTTP/1 service may allow malformed requests, potentially leading to a bypass of security policies. This issue is fixed in versions 1.26.0, 1.25.3, 1.24.4, 1.23.6, and 1.22.9.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.009 (57.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Envoyproxy Envoy — versions >= 1.25.0, < 1.25.3, >= 1.24.0, < 1.24.4, >= 1.23.0, < 1.23.6
Weakness classification (CWE)
References
- github.com/envoyproxy/envoy/security/advisories/GHSA-5jmv-cw9p-f9rp (Exploit, Vendor Advisory)
- datatracker.ietf.org/doc/html/rfc9113 (Not Applicable)
- datatracker.ietf.org/doc/html/rfc9114 (Not Applicable)
- www.rfc-editor.org/rfc/rfc9110 (Not Applicable)
Frequently asked questions
- What is CVE-2023-27491?
- CVE-2023-27491 is a medium-severity vulnerability in Envoyproxy Envoy, classified under Improper Input Validation. CVSS score: 5.4/10. Published 2023-04-04.
- How severe is CVE-2023-27491?
- Medium severity. CVSS v3 base score is 5.4 out of 10.