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Debian DSA-4266-1 : linux - security update

high Nessus Plugin ID 111557

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Synopsis

The remote Debian host is missing a security-related update.

Description

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation or denial of service.

 - CVE-2018-5390 Juha-Matti Tilli discovered that a remote attacker can trigger the worst case code paths for TCP stream reassembly with low rates of specially crafted packets leading to remote denial of service.

 - CVE-2018-13405 Jann Horn discovered that the inode_init_owner function in fs/inode.c in the Linux kernel allows local users to create files with an unintended group ownership allowing attackers to escalate privileges by making a plain file executable and SGID.

Solution

Upgrade the linux packages.

For the stable distribution (stretch), these problems have been fixed in version 4.9.110-3+deb9u1. This update includes fixes for several regressions in the latest point release.

See Also

https://security-tracker.debian.org/tracker/CVE-2018-5390

https://security-tracker.debian.org/tracker/CVE-2018-13405

https://security-tracker.debian.org/tracker/source-package/linux

https://packages.debian.org/source/stretch/linux

https://www.debian.org/security/2018/dsa-4266

Plugin Details

Severity: High

ID: 111557

File Name: debian_DSA-4266.nasl

Version: 1.7

Type: local

Agent: unix

Published: 8/7/2018

Updated: 7/15/2019

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

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

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:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:linux, cpe:/o:debian:debian_linux:9.0

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: 8/6/2018

Vulnerability Publication Date: 7/6/2018

Reference Information

CVE: CVE-2018-13405, CVE-2018-5390

DSA: 4266