Vulnerability · Published Dec 4, 2023 · Assigned by GitHub_M
CVE-2023-49290Malicious parameters can cause a denial of service in lestrrat-go/jwx
Medium 5.3
In plain English
A medium-severity uncontrolled resource consumption in jwx from lestrrat-go. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
lestrrat-go/jwx is a Go module implementing various JWx (JWA/JWE/JWK/JWS/JWT, otherwise known as JOSE) technologies. A p2c parameter set too high in JWE's algorithm PBES2-* could lead to a denial of service. The JWE key management algorithms based on PBKDF2 require a JOSE Header Parameter called p2c (PBES2 Count). This parameter dictates the number of PBKDF2 iterations needed to derive a CEK wrapping key. Its primary purpose is to intentionally slow down the key derivation function, making password brute-force and dictionary attacks more resource- intensive. Therefore, if an attacker sets the p2c parameter in JWE to a very large number, it can cause a lot of computational consumption, resulting in a denial of service. This vulnerability has been addressed in commit `64f2a229b` which has been included in release version 1.2.27 and 2.0.18. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/lestrrat-go/jwx | 1.2.27 | GHSA-7f9x-gw85-8grf |
| Go | github.com/lestrrat-go/jwx | 1.2.27 | GO-2023-2379 |
| Go | github.com/lestrrat-go/jwx/v2 | 2.0.18 | GHSA-7f9x-gw85-8grf |
| Go | github.com/lestrrat-go/jwx/v2 | 2.0.18 | GO-2023-2379 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| lestrrat-go | jwx | < 1.2.27>= 2.0.0, < 2.0.18 |
Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L