CVE-2020-8794
Published: 25 February 2020
OpenSMTPD before 6.6.4 allows remote code execution because of an out-of-bounds read in mta_io in mta_session.c for multi-line replies. Although this vulnerability affects the client side of OpenSMTPD, it is possible to attack a server because the server code launches the client code during bounce handling.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
opensmtpd Launchpad, Ubuntu, Debian |
bionic |
Released
(6.0.3p1-1ubuntu0.2)
|
| eoan |
Released
(6.0.3p1-6ubuntu0.2)
|
|
| focal |
Released
(6.6.4p1-1)
|
|
| groovy |
Released
(6.6.4p1-1)
|
|
| hirsute |
Released
(6.6.4p1-1)
|
|
| impish |
Released
(6.6.4p1-1)
|
|
| jammy |
Released
(6.6.4p1-1)
|
|
| kinetic |
Released
(6.6.4p1-1)
|
|
| lunar |
Released
(6.6.4p1-1)
|
|
| mantic |
Released
(6.6.4p1-1)
|
|
| trusty |
Needed
|
|
| upstream |
Released
(6.6.4p1-1)
|
|
| xenial |
Released
(5.7.3p2-1ubuntu0.1~esm2)
Available with Ubuntu Pro |
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 |