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/
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