Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2017-12972

Severity CVSS v4.0:
Pending analysis
Type:
CWE-345 Insufficient Verification of Data Authenticity
Publication date:
20/08/2017
Last modified:
20/04/2025

Description

In Nimbus JOSE+JWT before 4.39, there is no integer-overflow check when converting length values from bytes to bits, which allows attackers to conduct HMAC bypass attacks by shifting Additional Authenticated Data (AAD) and ciphertext so that different plaintext is obtained for the same HMAC.

Impact

Vector 3.x
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): High
Availability (A): None

Base Score 3.x
7.50
Severity 3.x
HIGH
Vector 2.0
AV:N/AC:L/Au:N/C:N/I:P/A:N CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): Physical
Availability (A): None

Base Score 2.0
5.00
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:connect2id:nimbus_jose\+jwt:1.0:*:*:*:*:*:*:*
cpe:2.3:a:connect2id:nimbus_jose\+jwt:1.1:*:*:*:*:*:*:*
cpe:2.3:a:connect2id:nimbus_jose\+jwt:1.2:*:*:*:*:*:*:*
cpe:2.3:a:connect2id:nimbus_jose\+jwt:1.3:*:*:*:*:*:*:*
cpe:2.3:a:connect2id:nimbus_jose\+jwt:1.4:*:*:*:*:*:*:*
cpe:2.3:a:connect2id:nimbus_jose\+jwt:1.5:*:*:*:*:*:*:*
cpe:2.3:a:connect2id:nimbus_jose\+jwt:1.6:*:*:*:*:*:*:*
cpe:2.3:a:connect2id:nimbus_jose\+jwt:1.7:*:*:*:*:*:*:*
cpe:2.3:a:connect2id:nimbus_jose\+jwt:1.8:*:*:*:*:*:*:*
cpe:2.3:a:connect2id:nimbus_jose\+jwt:1.9:*:*:*:*:*:*:*
cpe:2.3:a:connect2id:nimbus_jose\+jwt:1.9.1:*:*:*:*:*:*:*
cpe:2.3:a:connect2id:nimbus_jose\+jwt:1.10:*:*:*:*:*:*:*
cpe:2.3:a:connect2id:nimbus_jose\+jwt:1.11:*:*:*:*:*:*:*
cpe:2.3:a:connect2id:nimbus_jose\+jwt:1.12:*:*:*:*:*:*:*
cpe:2.3:a:connect2id:nimbus_jose\+jwt:2.0:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools