CVE-2024-21491
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.
Does this matter?
Lower severity and a low EPSS score (0.41%). Track it; it rarely justifies an emergency change on its own.
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 verification,no 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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
- EPSS
- 0.41% probability · 35th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-288, CWE-347
- Affected
- svix/svix-webhooks
- Source
- report@snyk.io
References
- https://github.com/svix/svix-webhooks/commit/958821bd3b956d1436af65f70a0964d4ffb7daf6Patch
- https://github.com/svix/svix-webhooks/pull/1190Patch
- https://rustsec.org/advisories/RUSTSEC-2024-0010.htmlThird Party Advisory
- https://security.snyk.io/vuln/SNYK-RUST-SVIX-6230729Third Party Advisory
- https://github.com/svix/svix-webhooks/commit/958821bd3b956d1436af65f70a0964d4ffb7daf6Patch
- https://github.com/svix/svix-webhooks/pull/1190Patch
- https://rustsec.org/advisories/RUSTSEC-2024-0010.htmlThird Party Advisory
- https://security.snyk.io/vuln/SNYK-RUST-SVIX-6230729Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.