NULL pointer dereference in Envoyproxy Envoy
CVE-2019-18838
An issue was discovered in Envoy 1.12.0. Upon receipt of a malformed HTTP request without a Host header, it sends an internally generated "Invalid request" response. This internally generated response is dispatched through the configured encoder filter chain before being sent to the client. An encoder filter that invokes route manager APIs that access a request's Host header causes a NULL pointer dereference, resulting in abnormal termination of the Envoy process.
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: 0.021 (81.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 81st percentile — 81.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.021 · newest: 0.021 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/envoyproxy/envoy/commits/master (Patch)
- groups.google.com/forum/
- blog.envoyproxy.io (Product)
- github.com/envoyproxy/envoy/security/advisories/GHSA-f2rv-4w6x-rwhc (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-18838?
- CVE-2019-18838 is a high-severity vulnerability in Envoyproxy Envoy, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2019-12-13.
- How severe is CVE-2019-18838?
- High severity. CVSS v3 base score is 7.5 out of 10.