CVE-2021-29157

2021-06-2115:05:59

redhat.com

access.redhat.com

dovecot

jwt

vulnerability

confidentiality

integrity

authentication

CVSS2

2.1

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

NONE

Availability Impact

NONE

AV:L/AC:L/Au:N/C:P/I:N/A:N

CVSS3

7.5

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

EPSS

0.001

Percentile

17.5%

JSON

A flaw was found in dovecot where it did not properly parse the kid and azp fields in JWT tokens. This flaw allows a local attacker to bypass dovecot’s authentication, and access a user’s emails. The highest threat from this vulnerability is to confidentiality and integrity.