VulnerabilityModified
CVE-2021-28683
There is a remotely exploitable NULL pointer dereference and crash in TLS when an unknown TLS alert code is received.
HIGH 7.5EPSS 1.69%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.69%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.69% probability · 76th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- envoyproxy/envoy
- Source
- cve@mitre.org
References
- https://blog.envoyproxy.ioVendor Advisory
- https://github.com/envoyproxy/envoy/releasesThird Party Advisory
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-r22g-5f3x-xjggNot Applicable, Third Party Advisory
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-xw4q-6pj2-5gfgThird Party Advisory
- https://blog.envoyproxy.ioVendor Advisory
- https://github.com/envoyproxy/envoy/releasesThird Party Advisory
- https://github.com/envoyproxy/envoy/security/advisories/GHSA-r22g-5f3x-xjggNot Applicable, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.