NULL pointer dereference in Envoyproxy Envoy
CVE-2021-28683
An issue was discovered in Envoy through 1.71.1. There is a remotely exploitable NULL pointer dereference and crash in TLS when an unknown TLS alert code is received.
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: 0.017 (76.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 76.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.017 · newest: 0.017 · change: 0.000
Affected products
- Envoyproxy Envoy — versions 1.16.2, 1.17.1
Weakness classification (CWE)
References
- github.com/envoyproxy/envoy/releases (Third Party Advisory)
- blog.envoyproxy.io (Vendor Advisory)
- github.com/envoyproxy/envoy/security/advisories/GHSA-r22g-5f3x-xjgg (Third Party Advisory, Not Applicable)
- github.com/envoyproxy/envoy/security/advisories/GHSA-xw4q-6pj2-5gfg (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-28683?
- CVE-2021-28683 is a high-severity vulnerability in Envoyproxy Envoy, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2021-05-20.
- How severe is CVE-2021-28683?
- High severity. CVSS v3 base score is 7.5 out of 10.