Debian DSA-4266-1 : linux - security update

High Nessus Plugin ID 111557

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: 1.5

Type: local

Agent: unix

Published: 2018/08/07

Modified: 2018/11/13

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.8

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

CVSS v3.0

Base Score: 7.8

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

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

Patch Publication Date: 2018/08/06

Reference Information

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

DSA: 4266