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Test ID:1.3.6.1.4.1.25623.1.0.704078
Category:Debian Local Security Checks
Title:Debian Security Advisory DSA 4078-1 (linux - security update)
Summary:Multiple researchers have discovered a vulnerability in Intel processors,;enabling an attacker controlling an unprivileged process to read memory from;arbitrary addresses, including from the kernel and all other processes running;on the system.;;This specific attack has been named Meltdown and is addressed in the Linux;kernel for the Intel x86-64 architecture by a patch set named Kernel Page Table;Isolation, enforcing a near complete separation of the kernel and userspace;address maps and preventing the attack. This solution might have a performance;impact, and can be disabled at boot time by passing pti=off;to the;kernel command line.;;We also identified a regression for ancient userspaces using the vsyscall;interface, for example chroot and containers using (e)glibc 2.13 and older,;including those based on Debian 7 or RHEL/CentOS 6. This regression will be;fixed in a later update.;;The other vulnerabilities (named Spectre) published at the same time are not;addressed in this update and will be fixed in a later update.
Description:Summary:
Multiple researchers have discovered a vulnerability in Intel processors,
enabling an attacker controlling an unprivileged process to read memory from
arbitrary addresses, including from the kernel and all other processes running
on the system.

This specific attack has been named Meltdown and is addressed in the Linux
kernel for the Intel x86-64 architecture by a patch set named Kernel Page Table
Isolation, enforcing a near complete separation of the kernel and userspace
address maps and preventing the attack. This solution might have a performance
impact, and can be disabled at boot time by passing pti=off
to the
kernel command line.

We also identified a regression for ancient userspaces using the vsyscall
interface, for example chroot and containers using (e)glibc 2.13 and older,
including those based on Debian 7 or RHEL/CentOS 6. This regression will be
fixed in a later update.

The other vulnerabilities (named Spectre) published at the same time are not
addressed in this update and will be fixed in a later update.

Affected Software/OS:
linux on Debian Linux

Solution:
For the oldstable distribution (jessie), this problem will be fixed in a
separate update.

For the stable distribution (stretch), this problem has been fixed in
version 4.9.65-3+deb9u2.

We recommend that you upgrade your linux packages.

CVSS Score:
4.7

CVSS Vector:
AV:L/AC:M/Au:N/C:C/I:N/A:N

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2017-5754
BugTraq ID: 102378
http://www.securityfocus.com/bid/102378
BugTraq ID: 106128
http://www.securityfocus.com/bid/106128
CERT/CC vulnerability note: VU#180049
https://www.kb.cert.org/vuls/id/180049
CERT/CC vulnerability note: VU#584653
http://www.kb.cert.org/vuls/id/584653
Cisco Security Advisory: 20180104 CPU Side-Channel Information Disclosure Vulnerabilities
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180104-cpusidechannel
Debian Security Information: DSA-4078 (Google Search)
https://www.debian.org/security/2018/dsa-4078
Debian Security Information: DSA-4082 (Google Search)
https://www.debian.org/security/2018/dsa-4082
Debian Security Information: DSA-4120 (Google Search)
https://www.debian.org/security/2018/dsa-4120
FreeBSD Security Advisory: FreeBSD-SA-18:03
https://security.FreeBSD.org/advisories/FreeBSD-SA-18:03.speculative_execution.asc
https://security.gentoo.org/glsa/201810-06
https://googleprojectzero.blogspot.com/2018/01/reading-privileged-memory-with-side.html
https://meltdownattack.com/
https://security.googleblog.com/2018/01/todays-cpu-vulnerability-what-you-need.html
https://www.oracle.com/security-alerts/cpuapr2020.html
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
https://lists.debian.org/debian-lts-announce/2018/01/msg00004.html
RedHat Security Advisories: RHSA-2018:0292
https://access.redhat.com/errata/RHSA-2018:0292
http://www.securitytracker.com/id/1040071
SuSE Security Announcement: SUSE-SU-2018:0010 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00006.html
SuSE Security Announcement: SUSE-SU-2018:0011 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html
SuSE Security Announcement: SUSE-SU-2018:0012 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00008.html
SuSE Security Announcement: openSUSE-SU-2018:0022 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00014.html
SuSE Security Announcement: openSUSE-SU-2018:0023 (Google Search)
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00016.html
https://usn.ubuntu.com/usn/usn-3516-1/
https://usn.ubuntu.com/usn/usn-3522-2/
https://usn.ubuntu.com/3522-3/
https://usn.ubuntu.com/3522-4/
https://usn.ubuntu.com/3523-1/
https://usn.ubuntu.com/usn/usn-3523-2/
https://usn.ubuntu.com/usn/usn-3524-2/
https://usn.ubuntu.com/usn/usn-3525-1/
https://usn.ubuntu.com/3540-2/
https://usn.ubuntu.com/3541-2/
https://usn.ubuntu.com/3583-1/
https://usn.ubuntu.com/3597-1/
https://usn.ubuntu.com/3597-2/
CopyrightCopyright (C) 2018 Greenbone Networks GmbH

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