CVE-2020-28007
Published: 4 May 2021
Exim 4 before 4.94.2 allows Execution with Unnecessary Privileges. Because Exim operates as root in the log directory (owned by a non-root user), a symlink or hard link attack allows overwriting critical root-owned files anywhere on the filesystem.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
exim4 Launchpad, Ubuntu, Debian |
upstream |
Needs triage
|
| 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) |
|
| xenial |
Released
(4.86.2-2ubuntu2.6+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.8 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |