CVE-2020-13696

Upstream information

CVE-2020-13696 at MITRE

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.

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having moderate severity.

CVSS v2 Scores
	National Vulnerability Database
Base Score	3.6
Vector	AV:L/AC:L/Au:N/C:P/I:P/A:N
Access Vector	Local
Access Complexity	Low
Authentication	None
Confidentiality Impact	Partial
Integrity Impact	Partial
Availability Impact	None

CVSS v3 Scores
	National Vulnerability Database
Base Score	4.4
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Access Vector	Local
Access Complexity	Low
Privileges Required	Low
User Interaction	None
Scope	Unchanged
Confidentiality Impact	Low
Integrity Impact	Low
Availability Impact	None
CVSSv3 Version	3.1

SUSE Bugzilla entry: 1171655 [RESOLVED / FIXED]

SUSE Security Advisories:

SUSE-SU-2020:1712-1, published Tue Jun 23 07:12:41 MDT 2020
openSUSE-SU-2020:0784-1, published Mon, 8 Jun 2020 06:19:44 +0200 (CEST)
openSUSE-SU-2020:0787-1, published Wed, 10 Jun 2020 18:13:55 +0200 (CEST)

List of released packages

Product(s)	Fixed package version(s)	References
SUSE Linux Enterprise Workstation Extension 12 SP4	`tv-common >= 3.103-6.3.1` `v4l-conf >= 3.103-6.3.1` `v4l-tools >= 3.103-6.3.1` `xawtv >= 3.103-6.3.1`	Patchnames: SUSE-SLE-WE-12-SP4-2020-1712
SUSE Linux Enterprise Workstation Extension 12 SP5	`tv-common >= 3.103-6.3.1` `v4l-conf >= 3.103-6.3.1` `v4l-tools >= 3.103-6.3.1` `xawtv >= 3.103-6.3.1`	Patchnames: SUSE-SLE-WE-12-SP5-2020-1712
SUSE Package Hub for SUSE Linux Enterprise 15 SP1	`alevtd >= 3.103-bp151.4.3.1` `motv >= 3.103-bp151.4.3.1` `pia >= 3.103-bp151.4.3.1` `tv-common >= 3.103-bp151.4.3.1` `v4l-conf >= 3.103-bp151.4.3.1` `v4l-tools >= 3.103-bp151.4.3.1` `xawtv >= 3.103-bp151.4.3.1`	Patchnames: openSUSE-2020-787
openSUSE Leap 15.1	`alevtd >= 3.103-lp151.3.3.1` `alevtd-debuginfo >= 3.103-lp151.3.3.1` `motv >= 3.103-lp151.3.3.1` `motv-debuginfo >= 3.103-lp151.3.3.1` `pia >= 3.103-lp151.3.3.1` `pia-debuginfo >= 3.103-lp151.3.3.1` `tv-common >= 3.103-lp151.3.3.1` `tv-common-debuginfo >= 3.103-lp151.3.3.1` `v4l-conf >= 3.103-lp151.3.3.1` `v4l-conf-debuginfo >= 3.103-lp151.3.3.1` `v4l-tools >= 3.103-lp151.3.3.1` `v4l-tools-debuginfo >= 3.103-lp151.3.3.1` `xawtv >= 3.103-lp151.3.3.1` `xawtv-debuginfo >= 3.103-lp151.3.3.1` `xawtv-debugsource >= 3.103-lp151.3.3.1`	Patchnames: openSUSE-2020-784

Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.