fkie_cve-2025-54887
Vulnerability from fkie_nvd
Published
2025-08-08 01:15
Modified
2025-08-08 20:30
Severity ?
Summary
jwe is a Ruby implementation of the RFC 7516 JSON Web Encryption (JWE) standard. In versions 1.1.0 and below, authentication tags of encrypted JWEs can be brute forced, which may result in loss of confidentiality for those JWEs and provide ways to craft arbitrary JWEs. This puts users at risk because JWEs can be modified to decrypt to an arbitrary value, decrypted by observing parsing differences and the GCM internal GHASH key can be recovered. Users are affected by this vulnerability even if they do not use an AES-GCM encryption algorithm for their JWEs. As the GHASH key may have been leaked, users must rotate the encryption keys after upgrading. This issue is fixed in version 1.1.1.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "jwe is a Ruby implementation of the RFC 7516 JSON Web Encryption (JWE) standard. In versions 1.1.0 and below, authentication tags of encrypted JWEs can be brute forced, which may result in loss of confidentiality for those JWEs and provide ways to craft arbitrary JWEs. This puts users at risk because JWEs can be modified to decrypt to an arbitrary value, decrypted by observing parsing differences and the GCM internal GHASH key can be recovered. Users are affected by this vulnerability even if they do not use an AES-GCM encryption algorithm for their JWEs. As the GHASH key may have been leaked, users must rotate the encryption keys after upgrading. This issue is fixed in version 1.1.1."
},
{
"lang": "es",
"value": "jwe es una implementaci\u00f3n en Ruby del est\u00e1ndar RFC 7516 JSON Web Encryption (JWE). En las versiones 1.1.0 y anteriores, las etiquetas de autenticaci\u00f3n de los JWE cifrados pueden ser atacadas por fuerza bruta, lo que puede resultar en la p\u00e9rdida de confidencialidad de dichos JWE y permitir la manipulaci\u00f3n de JWE arbitrarios. Esto pone en riesgo a los usuarios, ya que los JWE pueden modificarse para descifrarse a un valor arbitrario, descifrarse observando las diferencias de an\u00e1lisis y recuperar la clave GHASH interna de GCM. Los usuarios se ven afectados por esta vulnerabilidad incluso si no utilizan un algoritmo de cifrado AES-GCM para sus JWE. Dado que la clave GHASH puede haberse filtrado, los usuarios deben rotar las claves de cifrado despu\u00e9s de actualizar. Este problema se solucion\u00f3 en la versi\u00f3n 1.1.1."
}
],
"id": "CVE-2025-54887",
"lastModified": "2025-08-08T20:30:18.180",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 9.1,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 5.2,
"source": "security-advisories@github.com",
"type": "Secondary"
}
]
},
"published": "2025-08-08T01:15:25.287",
"references": [
{
"source": "security-advisories@github.com",
"url": "https://github.com/jwt/ruby-jwe/commit/1e719d79ba3d7aadaa39a2f08c25df077a0f9ff1"
},
{
"source": "security-advisories@github.com",
"url": "https://github.com/jwt/ruby-jwe/security/advisories/GHSA-c7p4-hx26-pr73"
}
],
"sourceIdentifier": "security-advisories@github.com",
"vulnStatus": "Awaiting Analysis",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-354"
}
],
"source": "security-advisories@github.com",
"type": "Primary"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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