CVE-2021-28682: envoyproxy envoy Integer Overflow or Wraparound

Vulnerability summary

CVE-2021-28682 is a high (CVSS 7.5) Integer Overflow or Wraparound vulnerability in envoyproxy envoy. EPSS estimates a 2.04% chance of exploitation in the next 30 days, higher than 80.9% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 20-05-2021
   PublishedVulnerability first disclosed.
2. 03-08-2024
   Last modifiedVulnerability information updated.

Description

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.

• CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.