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Debian DLA-2246-1 : xawtv security update

medium Nessus Plugin ID 137416

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Synopsis

The remote Debian host is missing a security update.

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.

For Debian 8 'Jessie', this problem has been fixed in version 3.103-3+deb8u1.

We recommend that you upgrade your xawtv packages.

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Upgrade the affected packages.

See Also

https://lists.debian.org/debian-lts-announce/2020/06/msg00018.html

https://packages.debian.org/source/jessie/xawtv

Plugin Details

Severity: Medium

ID: 137416

File Name: debian_DLA-2246.nasl

Version: 1.5

Type: local

Agent: unix

Published: 6/17/2020

Updated: 1/11/2021

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.3

CVSS v2

Risk Factor: Low

Base Score: 3.6

Temporal Score: 2.7

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:P/A:N

CVSS Score Source: CVE-2020-13696

CVSS v3

Risk Factor: Medium

Base Score: 4.4

Temporal Score: 3.9

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:alevtd, p-cpe:/a:debian:debian_linux:fbtv, p-cpe:/a:debian:debian_linux:pia, p-cpe:/a:debian:debian_linux:radio, p-cpe:/a:debian:debian_linux:scantv, p-cpe:/a:debian:debian_linux:streamer, p-cpe:/a:debian:debian_linux:ttv, p-cpe:/a:debian:debian_linux:v4l-conf, p-cpe:/a:debian:debian_linux:webcam, p-cpe:/a:debian:debian_linux:xawtv, p-cpe:/a:debian:debian_linux:xawtv-dbg, p-cpe:/a:debian:debian_linux:xawtv-plugin-qt, p-cpe:/a:debian:debian_linux:xawtv-plugins, p-cpe:/a:debian:debian_linux:xawtv-tools, cpe:/o:debian:debian_linux:8.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 6/12/2020

Vulnerability Publication Date: 6/8/2020

Reference Information

CVE: CVE-2020-13696