CVE-2017-12972

Published Aug 20, 2017

Last updated a year ago

Overview

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.
Source
cve@mitre.org
NVD status
Modified

Risk scores

CVSS 3.0

Type
Primary
Base score
7.5
Impact score
3.6
Exploitability score
3.9
Vector string
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Severity
HIGH

CVSS 2.0

Type
Primary
Base score
5
Impact score
2.9
Exploitability score
10
Vector string
AV:N/AC:L/Au:N/C:N/I:P/A:N

Weaknesses

nvd@nist.gov
CWE-345

Social media

Hype score
Not currently trending

Configurations