Dovecot before 2.3.15 allows ../ Path Traversal. An attacker with access to the local filesystem can trick OAuth2 authentication into using an HS256 validation key from an attacker-controlled location. This occurs during use of local JWT validation with the posix fs driver.
Metrics
CVSS Version: 3.1 |
Base Score: 7.5 HIGH Vector: CVSS:3.1/AC:H/AV:L/A:N/C:H/I:H/PR:L/S:C/UI:N
l➤ Exploitability Metrics: Attack Vector (AV)* LOCAL Attack Complexity (AC)* HIGH Privileges Required (PR)* LOW User Interaction (UI)* NONE Scope (S)* CHANGED
l➤ Impact Metrics: Confidentiality Impact (C)* HIGH Integrity Impact (I)* HIGH Availability Impact (A)* NONE
Weakness Enumeration (CWE)
CWE-ID: CWE Name: n/a Source: n/a
Common Attack Pattern Enumeration and Classification (CAPEC)