CVE-2020-13696

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.

Weakness classification

• nvd@nist.gov: CWE-863

Primary references

• cve@mitre.org — Mailing List, Third Party Advisory
• cve@mitre.org — Mailing List, Third Party Advisory
• cve@mitre.org — Issue Tracking, Mailing List, Third Party Advisory
• cve@mitre.org — Broken Link, Issue Tracking, Third Party Advisory
• cve@mitre.org — Patch, Vendor Advisory
• cve@mitre.org — Patch, Vendor Advisory
• cve@mitre.org — Patch, Vendor Advisory
• cve@mitre.org — Mailing List, Third Party Advisory
• cve@mitre.org
• cve@mitre.org
• cve@mitre.org — Third Party Advisory
• af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Third Party Advisory