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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 unprivil...
CVE-2020-13696
First seen on SecPulse
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2020-13696 xawtv Fixed in: 3.107-1
Original description The description as published by the source.
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.
References
- advisory lists.opensuse.org
- advisory lists.opensuse.org
- advisory lists.debian.org
- advisory usn.ubuntu.com
- patch git.linuxtv.org
- patch git.linuxtv.org
- patch git.linuxtv.org
- report openwall.com
- report bugzilla.suse.com
- web lists.fedoraproject.org
- web lists.fedoraproject.org