CVE-2020-13696
Medium
Description
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.
SeverityMedium
CVSS4.4
Exploit probability—
Product
Linuxtv Xawtv
PublishedJun 8, 2020
First seenJun 8, 2020
How to fix
Update
- linuxtv xawtv3.107 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linuxtv xawtv | v < 3.107 | 3.107 |
| debian debian_linux | 8.0 | — |
| opensuse backports_sle | 15.0 | — |
| opensuse leap | 15.1 | — |
| fedoraproject fedora | 31, 32 | — |
| canonical ubuntu_linux | 16.04 | — |
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