CVE-2020-28020
Published: 4 May 2021
Exim 4 before 4.92 allows Integer Overflow to Buffer Overflow, in which an unauthenticated remote attacker can execute arbitrary code by leveraging the mishandling of continuation lines during header-length restriction.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
exim4 Launchpad, Ubuntu, Debian |
bionic |
Released
(4.90.1-1ubuntu1.8)
|
| focal |
Not vulnerable
(4.93-13ubuntu1.1)
|
|
| groovy |
Not vulnerable
(4.94-7ubuntu1)
|
|
| hirsute |
Not vulnerable
(4.94-15ubuntu1)
|
|
| impish |
Not vulnerable
(4.94-15ubuntu1)
|
|
| jammy |
Not vulnerable
(4.94-15ubuntu1)
|
|
| upstream |
Released
(4.92)
|
|
| trusty |
Released
(4.82-3ubuntu2.4+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| xenial |
Released
(4.86.2-2ubuntu2.6+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
|
Patches: upstream: https://github.com/Exim/exim/commit/56ac062a3ff94fc4e1bbfc2293119c079a4e980b |
||
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 |