CVE-2020-13696 — An issue was discovered in LinuxTV xawtv before 3

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 setu

01What is this vulnerability?

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…

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2020-06-08T16:32:54.000Z
• Last modified: 2024-08-04T12:25:16.525Z

09References

• git.linuxtv.org — https://git.linuxtv.org/xawtv3.git/commit/?id=31f31f9cbaee7be806cba38e0ff5431bd4…
• git.linuxtv.org — https://git.linuxtv.org/xawtv3.git/commit/?id=36dc44e68e5886339b4a0fbe3f404fb1a4…
• git.linuxtv.org — https://git.linuxtv.org/xawtv3.git/commit/?id=8e3feea862db68d3ca0886f46cd99fab45…
• bugzilla.suse.com — https://bugzilla.suse.com/show_bug.cgi?id=CVE-2020-13696
• www.openwall.com — http://www.openwall.com/lists/oss-security/2020/06/04/6
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00009.html
• lists.opensuse.org — http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00013.html
• lists.debian.org — https://lists.debian.org/debian-lts-announce/2020/06/msg00018.html
• usn.ubuntu.com — https://usn.ubuntu.com/4518-1/
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…
• lists.fedoraproject.org — https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro…