CVE-2020-8793
Published: 25 February 2020
OpenSMTPD before 6.6.4 allows local users to read arbitrary files (e.g., on some Linux distributions) because of a combination of an untrusted search path in makemap.c and race conditions in the offline functionality in smtpd.c.
Mitigation
Ubuntu ships with /proc/sys/fs/protected_hardlinks enabled by default, making this vulnerability not exploitable.
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 |
Needs triage
|
|
| xenial |
Released
(5.7.3p2-1ubuntu0.1~esm2)
Available with Ubuntu Pro |
|
| This vulnerability is mitigated in part by the use of hardlink restrictions in Ubuntu. | ||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 4.7 |
| Attack vector | Local |
| Attack complexity | High |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N |