CVE-2020-13696

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

08/06/2020

Last modified:

07/11/2023

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.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N CVSS v3.1 Severity and Metrics:

Base Score: 4.40 MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): Low
Integrity (I): Low
Availability (A): None

Base Score 3.x

4.40

Severity 3.x

MEDIUM

Vector 2.0

AV:L/AC:L/Au:N/C:P/I:P/A:N CVSS v2.0 Severity and Metrics:

Base Score: 3.60 LOW
Vector: AV:L/AC:L/Au:N/C:P/I:P/A:N

Attack Vector (AV): Local
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): None

Base Score 2.0

3.60

Severity 2.0

LOW

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:linuxtv:xawtv::::::::		3.107 (excluding)
cpe:2.3:o:debian:debian_linux:8.0:::::::*
cpe:2.3:a:opensuse:backports_sle:15.0:sp1::::::
cpe:2.3:o:opensuse:leap:15.1:::::::*
cpe:2.3:o:fedoraproject:fedora:31:::::::*
cpe:2.3:o:fedoraproject:fedora:32:::::::*
cpe:2.3:o:canonical:ubuntu_linux:16.04::::esm:::

To consult the complete list of CPE names with products and versions, see this page

CPE	From	Up to
cpe:2.3:a:linuxtv:xawtv::::::::		3.107 (excluding)
cpe:2.3:o:debian:debian_linux:8.0:::::::*
cpe:2.3:a:opensuse:backports_sle:15.0:sp1::::::
cpe:2.3:o:opensuse:leap:15.1:::::::*
cpe:2.3:o:fedoraproject:fedora:31:::::::*
cpe:2.3:o:fedoraproject:fedora:32:::::::*
cpe:2.3:o:canonical:ubuntu_linux:16.04::::esm:::

CVE-2020-13696

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools