CVE-2020-28026
Published: 4 May 2021
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.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
exim4 Launchpad, Ubuntu, Debian |
bionic |
Released
(4.90.1-1ubuntu1.8)
|
| focal |
Released
(4.93-13ubuntu1.5)
|
|
| groovy |
Released
(4.94-7ubuntu1.2)
|
|
| hirsute |
Released
(4.94-15ubuntu1.2)
|
|
| impish |
Released
(4.94-15ubuntu1.2)
|
|
| jammy |
Released
(4.94-15ubuntu1.2)
|
|
| trusty |
Released
(4.82-3ubuntu2.4+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| upstream |
Needs triage
|
|
| xenial |
Released
(4.86.2-2ubuntu2.6+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 9.8 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |