Vulnerability Details : 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.
Vulnerability category: Memory Corruption
Products affected by CVE-2021-28683
- cpe:2.3:a:envoyproxy:envoy:1.16.2:*:*:*:*:*:*:*
- cpe:2.3:a:envoyproxy:envoy:1.17.1:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-28683
0.17%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 54 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-28683
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2021-28683
-
The product dereferences a pointer that it expects to be valid but is NULL.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-28683
-
https://blog.envoyproxy.io
Envoy ProxyVendor Advisory
-
https://github.com/envoyproxy/envoy/releases
Releases · envoyproxy/envoy · GitHubThird Party Advisory
-
https://github.com/envoyproxy/envoy/security/advisories/GHSA-r22g-5f3x-xjgg
Integer overflow in large grpc-timeout values leads to unexpected timeout calculations · Advisory · envoyproxy/envoy · GitHubNot Applicable;Third Party Advisory
-
https://github.com/envoyproxy/envoy/security/advisories/GHSA-xw4q-6pj2-5gfg
Crash when peer sends a TLS Alert with an unknown code · Advisory · envoyproxy/envoy · GitHubThird Party Advisory
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