PT-2020-3177 · Linuxtv+2 · Xawtv+2

Matthias Gerstner · Published 2020-05-16 · Updated 2024-06-15 · CVE-2020-13696

Positive Technologies (AI Summary)

CVSS v3.1

4.4

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions LinuxTV xawtv versions prior to 3.107

Description The issue is related to insufficient checks in the dev open() function, allowing a local attacker to test for the existence of arbitrary files and trigger an open on arbitrary files with mode O RDWR. This can be achieved by adding relative path components to the device path. The vulnerability may allow an attacker to gain unauthorized access to protected information.

Recommendations For LinuxTV xawtv versions prior to 3.107, consider updating to version 3.107 or later to resolve the issue. As a temporary workaround, restrict access to the v4l-conf setuid-root program to minimize the risk of exploitation. Avoid using relative path components in the device path to prevent unintended filesystem access.

Fix

Incorrect Authorization

Incorrect Permission

Weakness Enumeration

CWE-863

CWE-732

Related Identifiers

BDU:2020-03475

CVE-2020-13696

DLA-2246-1

MGASA-2020-0257

OPENSUSE-SU-2020:0784-1

OPENSUSE-SU-2020:0787-1

OPENSUSE-SU-2020_0784-1

OPENSUSE-SU-2024:11517-1

SUSE-SU-2020:1712-1

USN-4518-1

Affected Products

Suse

Ubuntu

Xawtv

References · 36

• https://ubuntu.com/security/notices/USN-4518-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2024:11517-1 · Vendor Advisory
• https://git.linuxtv.org/xawtv3.git/commit/?id=31f31f9cbaee7be806cba38e0ff5431bd44b20a3 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2020:0787-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-13696 · Security Note
• https://osv.dev/vulnerability/CVE-2020-13696 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-2246-1 · Vendor Advisory
• https://git.linuxtv.org/xawtv3.git/commit/?id=8e3feea862db68d3ca0886f46cd99fab45d2db7c · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-13696 · Security Note
• http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00013.html · Vendor Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00009.html · Vendor Advisory
• https://usn.ubuntu.com/4518-1 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ELOXU5LXQSQOXX64D4BICZV3TQWOBXHC · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7XWAO7W2DGA6M52JGK2TDWUGF62Q2KY · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2020-13696 · Vendor Advisory