Test ID:	1.3.6.1.4.1.25623.1.0.704131
Category:	Debian Local Security Checks
Title:	Debian Security Advisory DSA 4131-1 (xen - security update)
Summary:	Multiple vulnerabilities have been discovered in the Xen hypervisor:;;CVE-2018-7540;Jann Horn discovered that missing checks in page table freeing may;result in denial of service.;;CVE-2018-7541;Jan Beulich discovered that incorrect error handling in grant table;checks may result in guest-to-host denial of service and potentially;privilege escalation.;;CVE-2018-7542;Ian Jackson discovered that insufficient handling of x86 PVH guests;without local APICs may result in guest-to-host denial of service.
Description:	Summary: Multiple vulnerabilities have been discovered in the Xen hypervisor: CVE-2018-7540 Jann Horn discovered that missing checks in page table freeing may result in denial of service. CVE-2018-7541 Jan Beulich discovered that incorrect error handling in grant table checks may result in guest-to-host denial of service and potentially privilege escalation. CVE-2018-7542 Ian Jackson discovered that insufficient handling of x86 PVH guests without local APICs may result in guest-to-host denial of service. Affected Software/OS: xen on Debian Linux Solution: For the stable distribution (stretch), these problems have been fixed in version 4.8.3+comet2+shim4.10.0+comet3-1+deb9u5. We recommend that you upgrade your xen packages. CVSS Score: 6.1 CVSS Vector: AV:L/AC:L/Au:N/C:P/I:P/A:C
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2018-7540 BugTraq ID: 103174 http://www.securityfocus.com/bid/103174 Debian Security Information: DSA-4131 (Google Search) https://www.debian.org/security/2018/dsa-4131 https://security.gentoo.org/glsa/201810-06 https://lists.debian.org/debian-lts-announce/2018/03/msg00003.html https://lists.debian.org/debian-lts-announce/2018/11/msg00013.html http://www.securitytracker.com/id/1040773 Common Vulnerability Exposure (CVE) ID: CVE-2018-7541 BugTraq ID: 103177 http://www.securityfocus.com/bid/103177 http://www.securitytracker.com/id/1040775 Common Vulnerability Exposure (CVE) ID: CVE-2018-7542 http://www.securitytracker.com/id/1040776
Copyright	Copyright (C) 2018 Greenbone Networks GmbH

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