Integer overflow in Envoyproxy Envoy
CVE-2021-28682
An issue was discovered in Envoy through 1.71.1. There is a remotely exploitable integer overflow in which a very large grpc-timeout value leads to unexpected timeout calculations.
Vulnerability class: Integer Overflow
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: 0.020 (80.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 80.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000
Affected products
- Envoyproxy Envoy — versions 1.14.6, 1.15.3, 1.16.2
Weakness classification (CWE)
References
- github.com/envoyproxy/envoy/releases (Third Party Advisory)
- blog.envoyproxy.io (Vendor Advisory)
- github.com/envoyproxy/envoy/blob/15e3b9dbcc9aaa9d391fa8033904aad1ea1ae70d/api/e… (Exploit, Third Party Advisory)
- github.com/envoyproxy/envoy/security/advisories/GHSA-r22g-5f3x-xjgg (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-28682?
- CVE-2021-28682 is a high-severity vulnerability in Envoyproxy Envoy, classified under Integer Overflow or Wraparound. CVSS score: 7.5/10. Published 2021-05-20.
- How severe is CVE-2021-28682?
- High severity. CVSS v3 base score is 7.5 out of 10.