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CVE-2024-21664

Parsing JSON serialized payload without protected field can lead to segfault

HIGH
7.5
CVSS Score
Published: January 9, 2024 at 07:18 PM UTC
Updated: June 17, 2026 at 07:09 AM UTC
2 products affected across 1 vendorJwxGo Jwx

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Severity
HIGH7.5
Exploit prediction
EPSS 0.9%
SSVC
PoC

Description

jwx is a Go module implementing various JWx (JWA/JWE/JWK/JWS/JWT, otherwise known as JOSE) technologies. Calling `jws.Parse` with a JSON serialized payload where the `signature` field is present while `protected` is absent can lead to a nil pointer dereference. The vulnerability can be used to crash/DOS a system doing JWS verification. This vulnerability has been patched in versions 2.0.19 and 1.2.28.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Jwx· Lestrrat Go
95%
v < 1.2.28v < 2.0.19
Affected range stops below 1.2.28, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.0.19, so it looks safe — our inference, not a vendor statement
Go Jwx· Lestrrat Go
75%
v < 1.2.28v < 2.0.19
Affected range stops below 1.2.28, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.0.19, so it looks safe — our inference, not a vendor statement

References (4)

x_refsource_MISCPatch
Source: [email protected]
https://github.com/lestrrat-go/jwx/commit/0e8802ce6842625845d651456493e7c87625601f
x_refsource_MISC
Source: [email protected]
https://github.com/lestrrat-go/jwx/commit/8c53d0ae52d5ab1e2b37c5abb67def9e7958fd65
x_refsource_MISCPatch
Source: [email protected]
https://github.com/lestrrat-go/jwx/commit/d69a721931a5c48b9850a42404f18e143704adcd
x_refsource_CONFIRMExploitVendor Advisory
Source: [email protected]
https://github.com/lestrrat-go/jwx/security/advisories/GHSA-pvcr-v8j8-j5q3

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-476

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