Executive Summary
Summary | |
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Title | xen security update |
Informations | |||
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Name | DSA-4112 | First vendor Publication | 2018-02-14 |
Vendor | Debian | Last vendor Modification | 2018-02-14 |
Severity (Vendor) | N/A | Revision | 1 |
Security-Database Scoring CVSS v3
Cvss vector : N/A | |||
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Overall CVSS Score | NA | ||
Base Score | NA | Environmental Score | NA |
impact SubScore | NA | Temporal Score | NA |
Exploitabality Sub Score | NA | ||
Calculate full CVSS 3.0 Vectors scores |
Security-Database Scoring CVSS v2
Cvss vector : (AV:L/AC:M/Au:N/C:C/I:C/A:C) | |||
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Cvss Base Score | 6.9 | Attack Range | Local |
Cvss Impact Score | 10 | Attack Complexity | Medium |
Cvss Expoit Score | 3.4 | Authentication | None Required |
Calculate full CVSS 2.0 Vectors scores |
Detail
Multiple vulnerabilities have been discovered in the Xen hypervisor: CVE-2017-17563 Jan Beulich discovered that an incorrect reference count overflow check in x86 shadow mode may result in denial of service or privilege escalation. CVE-2017-17564 Jan Beulich discovered that improper x86 shadow mode reference count error handling may result in denial of service or privilege escalation. CVE-2017-17565 Jan Beulich discovered that an incomplete bug check in x86 log-dirty handling may result in denial of service. CVE-2017-17566 Jan Beulich discovered that x86 PV guests may gain access to internally used pages which could result in denial of service or potential privilege escalation. In addition this update ships the "Comet" shim to address the Meltdown class of vulnerabilities for guests with legacy PV kernels. In addition, the package provides the "Xen PTI stage 1" mitigation which is built-in and enabled by default on Intel systems, but can be disabled with `xpti=false' on the hypervisor command line (It does not make sense to use both xpti and the Comet shim.) Please refer to the following URL for more details on how to configure individual mitigation strategies: https://xenbits.xen.org/xsa/advisory-254.html Additional information can also be found in README.pti and README.comet. For the stable distribution (stretch), these problems have been fixed in version 4.8.3+comet2+shim4.10.0+comet3-1+deb9u4.1. We recommend that you upgrade your xen packages. For the detailed security status of xen please refer to its security tracker page at: https://security-tracker.debian.org/tracker/xen |
Original Source
Url : http://www.debian.org/security/2018/dsa-4112 |
CWE : Common Weakness Enumeration
% | Id | Name |
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33 % | CWE-388 | Error Handling |
33 % | CWE-119 | Failure to Constrain Operations within the Bounds of a Memory Buffer |
33 % | CWE-20 | Improper Input Validation |
CPE : Common Platform Enumeration
Nessus® Vulnerability Scanner
Date | Description |
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2018-10-19 | Name : The remote Debian host is missing a security update. File : debian_DLA-1549.nasl - Type : ACT_GATHER_INFO |
2018-04-06 | Name : A server virtualization platform installed on the remote host is affected by ... File : citrix_xenserver_CTX232096.nasl - Type : ACT_GATHER_INFO |
2018-02-15 | Name : The remote Debian host is missing a security-related update. File : debian_DSA-4112.nasl - Type : ACT_GATHER_INFO |
2018-01-15 | Name : The remote Fedora host is missing a security update. File : fedora_2017-5945560816.nasl - Type : ACT_GATHER_INFO |
2018-01-15 | Name : The remote Gentoo host is missing one or more security-related patches. File : gentoo_GLSA-201801-14.nasl - Type : ACT_GATHER_INFO |
2018-01-08 | Name : The remote Debian host is missing a security update. File : debian_DLA-1230.nasl - Type : ACT_GATHER_INFO |
2018-01-05 | Name : A server virtualization platform installed on the remote host is affected by ... File : citrix_xenserver_CTX231390.nasl - Type : ACT_GATHER_INFO |
2018-01-03 | Name : The remote Fedora host is missing a security update. File : fedora_2017-16a414b3c5.nasl - Type : ACT_GATHER_INFO |
Alert History
Date | Informations |
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2018-02-15 00:19:31 |
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