Debian DLA-1863-1 : linux-4.9 security update

high Nessus Plugin ID 126965

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Synopsis

The remote Debian host is missing a security update.

Description

Jann Horn discovered that the ptrace subsystem in the Linux kernel mishandles the management of the credentials of a process that wants to create a ptrace relationship, allowing a local user to obtain root privileges under certain scenarios.

For Debian 8 'Jessie', this problem has been fixed in version 4.9.168-1+deb9u4~deb8u1.

We recommend that you upgrade your linux-4.9 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.

Plugin Details

Severity: High

ID: 126965

File Name: debian_DLA-1863.nasl

Version: 1.9

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 7/24/2019

Updated: 12/20/2021

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

Risk Information

VPR

Risk Factor: Critical

Score: 9.7

CVSS v2

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

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

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.5

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:linux-compiler-gcc-4.9-arm, p-cpe:/a:debian:debian_linux:linux-doc-4.9, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-0.bpo.7-686, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-0.bpo.7-686-pae, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-0.bpo.7-all, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-0.bpo.7-all-amd64, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-0.bpo.7-all-armel, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-0.bpo.7-all-armhf, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-0.bpo.7-all-i386, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-0.bpo.7-amd64, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-0.bpo.7-armmp, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-0.bpo.7-armmp-lpae, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-0.bpo.7-common, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-0.bpo.7-common-rt, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-0.bpo.7-marvell, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-0.bpo.7-rt-686-pae, p-cpe:/a:debian:debian_linux:linux-headers-4.9.0-0.bpo.7-rt-amd64, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-0.bpo.7-686, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-0.bpo.7-686-pae, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-0.bpo.7-686-pae-dbg, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-0.bpo.7-amd64, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-0.bpo.7-amd64-dbg, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-0.bpo.7-armmp, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-0.bpo.7-armmp-lpae, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-0.bpo.7-marvell, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-0.bpo.7-rt-686-pae, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-0.bpo.7-rt-686-pae-dbg, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-0.bpo.7-rt-amd64, p-cpe:/a:debian:debian_linux:linux-image-4.9.0-0.bpo.7-rt-amd64-dbg, p-cpe:/a:debian:debian_linux:linux-kbuild-4.9, p-cpe:/a:debian:debian_linux:linux-manual-4.9, p-cpe:/a:debian:debian_linux:linux-perf-4.9, p-cpe:/a:debian:debian_linux:linux-source-4.9, p-cpe:/a:debian:debian_linux:linux-support-4.9.0-0.bpo.7, cpe:/o:debian:debian_linux:8.0

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/23/2019

Vulnerability Publication Date: 7/17/2019

CISA Known Exploited Vulnerability Due Dates: 6/10/2022

Exploitable With

Metasploit (Linux Polkit pkexec helper PTRACE_TRACEME local root exploit)

Reference Information

CVE: CVE-2019-13272

Detections

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