CVE-2020-13696
Published: 8 June 2020
An issue was discovered in LinuxTV xawtv before 3.107. The function dev_open() in v4l-conf.c does not perform sufficient checks to prevent an unprivileged caller of the program from opening unintended filesystem paths. This allows a local attacker with access to the v4l-conf setuid-root program to test for the existence of arbitrary files and to trigger an open on arbitrary files with mode O_RDWR. To achieve this, relative path components need to be added to the device path, as demonstrated by a v4l-conf -c /dev/../root/.bash_history command.
Priority
Status
| Package | Release | Status |
|---|---|---|
|
xawtv Launchpad, Ubuntu, Debian |
bionic |
Needs triage
|
| eoan |
Ignored
(end of life)
|
|
| focal |
Needs triage
|
|
| groovy |
Not vulnerable
(3.107-1)
|
|
| hirsute |
Not vulnerable
(3.107-1)
|
|
| impish |
Not vulnerable
(3.107-1)
|
|
| jammy |
Not vulnerable
(3.107-1)
|
|
| kinetic |
Not vulnerable
(3.107-1)
|
|
| lunar |
Not vulnerable
(3.107-1)
|
|
| mantic |
Not vulnerable
(3.107-1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Released
(3.103-3+deb8u1build0.16.04.1)
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 4.4 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity impact | Low |
| Availability impact | None |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |