Bug 2252905 (CVE-2023-49290) - CVE-2023-49290 jwx: Malicious parameters in JWE can cause denial of service
Summary: CVE-2023-49290 jwx: Malicious parameters in JWE can cause denial of service
Keywords:
Status: NEW
Alias: CVE-2023-49290
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2252906 2252907
Blocks: 2252908
TreeView+ depends on / blocked
 
Reported: 2023-12-05 07:42 UTC by Pedro Sampaio
Modified: 2024-04-08 09:25 UTC (History)
21 users (show)

Fixed In Version: jwx 2.0.18, jwx 1.2.27
Doc Type: ---
Doc Text:
A flaw was found in JWX. This issue occurs when passing crafted input to the JWE key management algorithm, which may result in a denial of service by using an excessive amount of CPU resources.
Clone Of:
Environment:
Last Closed:
Embargoed:


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Description Pedro Sampaio 2023-12-05 07:42:41 UTC
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.

References:

https://github.com/lestrrat-go/jwx/commit/64f2a229b8e18605f47361d292b526bdc4aee01c
https://github.com/lestrrat-go/jwx/security/advisories/GHSA-7f9x-gw85-8grf

Comment 1 Pedro Sampaio 2023-12-05 07:45:55 UTC
Created golang-github-deepmap-oapi-codegen tracking bugs for this issue:

Affects: fedora-all [bug 2252906]


Created golang-github-lestrrat-jwx tracking bugs for this issue:

Affects: fedora-all [bug 2252907]


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