CVE-2024-32475: envoyproxy envoy Incorrect Check of Function Return Value

Vulnerability summary

CVE-2024-32475 is a high (CVSS 7.5) Incorrect Check of Function Return Value vulnerability in envoyproxy envoy. EPSS estimates a 0.69% chance of exploitation in the next 30 days, higher than 51.7% of scored vulnerabilities.

Timeline

1. 18-04-2024
   PublishedVulnerability first disclosed.
2. 02-08-2024
   Last modifiedVulnerability information updated.

Description

Envoy is a cloud-native, open source edge and service proxy. When an upstream TLS cluster is used with `auto_sni` enabled, a request containing a `host`/`:authority` header longer than 255 characters triggers an abnormal termination of Envoy process. Envoy does not gracefully handle an error when setting SNI for outbound TLS connection. The error can occur when Envoy attempts to use the `host`/`:authority` header value longer than 255 characters as SNI for outbound TLS connection. SNI length is limited to 255 characters per the standard. Envoy always expects this operation to succeed and abnormally aborts the process when it fails. This vulnerability is fixed in 1.30.1, 1.29.4, 1.28.3, and 1.27.5.

• CWE-253Incorrect Check of Function Return ValueThe product incorrectly checks a return value from a function, which prevents it from detecting errors or exceptional conditions.
• CWE-617Reachable AssertionThe product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.