CVE-2023-49290 (GCVE-0-2023-49290)
Vulnerability from cvelistv5 – Published: 2023-12-04 23:42 – Updated: 2025-05-29 13:39
VLAI
EPSS
VEX
Title
Malicious parameters can cause a denial of service in lestrrat-go/jwx
Summary
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.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-05-29 13:39 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
GitHub_M
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/lestrrat-go/jwx/security/advis… | x_refsource_CONFIRM |
| https://github.com/lestrrat-go/jwx/commit/64f2a22… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| lestrrat-go | jwx |
Affected:
< 1.2.27
Affected: >= 2.0.0, < 2.0.18 |
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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