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.
CVSS Details
- CVSS 3.1 Base Score: 4.4
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade xawtv | Jun 15, 2020 | Jun 8, 2020 |
| Suse | — | Upgrade motvUpgrade v4l-toolsUpgrade alevtdUpgrade xawtvUpgrade piaUpgrade v4l-confUpgrade tv-common | Jun 8, 2020 | Jun 8, 2020 |
| Ubuntu | — | Upgrade radioUpgrade piaUpgrade xawtv-pluginsUpgrade xawtv-plugin-qtUpgrade webcamUpgrade streamerUpgrade v4l-confUpgrade alevtdUpgrade ttvUpgrade xawtv-toolsUpgrade xawtvUpgrade fbtvUpgrade scantv | Sep 18, 2020 | Jun 8, 2020 |
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