CVE-2024-21491 Information

Description

Versions of the package svix before 1.17.0 are vulnerable to Authentication Bypass due to an issue in the verify function where signatures of different lengths are incorrectly compared. An attacker can bypass signature verification by providing a shorter signature that matches the beginning of the actual signature. Note: The attacker would need to know a victim uses the Rust library for verificationno easy way to automatically check that; and uses webhooks by a service that uses Svix and then figure out a way to craft a malicious payload that will actually include all of the correct identifiers needed to trick the receivers to cause actual issues.

Reference

https://security.snyk.io/vuln/SNYK-RUST-SVIX-6230729 https://github.com/svix/svix-webhooks/pull/1190 https://github.com/svix/svix-webhooks/commit/958821bd3b956d1436af65f70a0964d4ffb7daf6 https://rustsec.org/advisories/RUSTSEC-2024-0010.html