Published: 20/05/2021 Updated: 27/05/2021

CVSS v2 Base Score: 5 | Impact Score: 2.9 | Exploitability Score: 10

CVSS v3 Base Score: 7.5 | Impact Score: 3.6 | Exploitability Score: 3.9

VMScore: 445

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

An issue exists in Envoy up to and including 1.71.1. There is a remotely exploitable integer overflow in which a very large grpc-timeout value leads to unexpected timeout calculations.

Vulnerable Product	Search on Vulmon	Subscribe to Product
envoyproxy envoy 1.14.6
envoyproxy envoy 1.15.3
envoyproxy envoy 1.16.2
envoyproxy envoy 1.17.1

A flaw was found in envoyproxy/envoy An attacker, able to craft a packet which specifies a large grpc-timeout, can potentially cause envoy to incorrectly calculate the timeouts resulting in a denial of service The highest threat from this vulnerability is to system availability ...

Envoy before version 1180, and subsequently Istio before version 193, contains a remotely exploitable integer overflow in which a very large grpc-timeout value leads to unexpected timeout calculations ...

CWE-190 https://github.com/envoyproxy/envoy/blob/15e3b9dbcc9aaa9d391fa8033904aad1ea1ae70d/api/envoy/api/v2/cluster.proto#L36 https://github.com/envoyproxy/envoy/releases https://blog.envoyproxy.io https://github.com/envoyproxy/envoy/security/advisories/GHSA-r22g-5f3x-xjgg https://nvd.nist.gov https://access.redhat.com/security/cve/cve-2021-28682

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CVE-2021-28682

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