CVE-2020-28026 Information

Description

Exim 4 before 4.94.2 has Improper Neutralization of Line Delimiters relevant in non-default configurations that enable Delivery Status Notification (DSN). Certain uses of ORCPT= can place a newline into a spool header file and indirectly allow unauthenticated remote attackers to execute arbitrary commands as root.

CVSS Vector

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

Reference

https://www.exim.org/static/doc/security/CVE-2020-qualys/CVE-2020-28026-FGETS.txt

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8