CVE-2020-13696
First published: Mon Jun 08 2020(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| ubuntu/xawtv | <3.103-3+ | 3.103-3+ |
| debian/xawtv | 3.107-1 3.107-1.1 3.107-2 | |
| LinuxTV xawtv | <3.107 | |
| Debian GNU/Linux | =8.0 | |
| openSUSE Backports | =15.0-sp1 | |
| openSUSE | =15.1 | |
| Fedoraproject Fedora | =31 | |
| Fedoraproject Fedora | =32 | |
| Ubuntu Linux | =16.04 | |
| Debian | =8.0 | |
| Fedora | =31 | |
| Fedora | =32 | |
| Ubuntu | =16.04 |
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Reference Links
- http://www.openwall.com/lists/oss-security/2020/06/04/6
- https://bugzilla.suse.com/show_bug.cgi?id=CVE-2020-13696
- https://git.linuxtv.org/xawtv3.git/commit/?id=31f31f9cbaee7be806cba38e0ff5431bd44b20a3
- https://git.linuxtv.org/xawtv3.git/commit/?id=36dc44e68e5886339b4a0fbe3f404fb1a4fd2292
- https://git.linuxtv.org/xawtv3.git/commit/?id=8e3feea862db68d3ca0886f46cd99fab45d2db7c
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00013.html
- http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00009.html
- https://lists.debian.org/debian-lts-announce/2020/06/msg00018.html
- https://usn.ubuntu.com/4518-1/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ELOXU5LXQSQOXX64D4BICZV3TQWOBXHC/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/I7XWAO7W2DGA6M52JGK2TDWUGF62Q2KY/
- https://launchpad.net/bugs/cve/CVE-2020-13696
- https://www.openwall.com/lists/oss-security/2020/06/04/6
- https://www.openwall.com/lists/oss-security/2020/06/04/6/1
- https://security-tracker.debian.org/tracker/CVE-2020-13696
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ELOXU5LXQSQOXX64D4BICZV3TQWOBXHC/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7XWAO7W2DGA6M52JGK2TDWUGF62Q2KY/
- https://ubuntu.com/security/notices/USN-4518-1
- https://www.cve.org/CVERecord?id=CVE-2020-13696
- https://nvd.nist.gov/vuln/detail/CVE-2020-13696
- https://ubuntu.com/security/CVE-2020-13696
Frequently Asked Questions
What is the severity of CVE-2020-13696?
CVE-2020-13696 has a medium severity rating due to its potential for unauthorized local access.
How do I fix CVE-2020-13696?
To fix CVE-2020-13696, upgrade xawtv to version 3.107 or later.
What software is affected by CVE-2020-13696?
CVE-2020-13696 affects LinuxTV xawtv versions prior to 3.107, including specific versions in Debian and Ubuntu.
Can CVE-2020-13696 be exploited remotely?
CVE-2020-13696 cannot be exploited remotely as it requires local access to the affected system.
Who is at risk for CVE-2020-13696?
Local attackers with access to the v4l-conf setuid-root program on vulnerable systems are at risk for CVE-2020-13696.
- agent/type
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