// For flags

CVE-2018-1000539

Debian Security Advisory 4283-1

Severity Score

5.3
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Nov json-jwt version >= 0.5.0 && < 1.9.4 contains a CWE-347: Improper Verification of Cryptographic Signature vulnerability in Decryption of AES-GCM encrypted JSON Web Tokens that can result in Attacker can forge a authentication tag. This attack appear to be exploitable via network connectivity. This vulnerability appears to have been fixed in 1.9.4 and later.

Nov json-jwt, en versiones 0.5.0 hasta la 1.9.4 contiene una vulnerabilidad CWE-347: verificación incorrecta de firmas criptográficas en el descifrado de tokens web JSON cifrados por AES-GCM que puede resultar en que un atacante falsifique una etiqueta de autenticación. Este ataque parece ser explotable mediante conectividad de red. La vulnerabilidad parece haber sido solucionada en las versiones 1.9.4 y siguientes.

It was discovered that ruby-json-jwt, a Ruby implementation of JSON web tokens performed insufficient validation of GCM auth tags.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2018-05-01 CVE Reserved
  • 2018-06-26 CVE Published
  • 2024-08-05 CVE Updated
  • 2025-03-30 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-347: Improper Verification of Cryptographic Signature
CAPEC
References (2)
URL Tag Source
https://github.com/nov/json-jwt/pull/62 Third Party Advisory
URL Date SRC
URL Date SRC
URL Date SRC
https://www.debian.org/security/2018/dsa-4283 2018-09-02
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Json-jwt Project
Search vendor "Json-jwt Project"
 Json-jwt
Search vendor "Json-jwt Project" for product "Json-jwt"
 >= 0.5.0 < 1.9.4
Search vendor "Json-jwt Project" for product "Json-jwt" and version " >= 0.5.0 < 1.9.4"
-
Affected