Executive Summary
Summary | |
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Title | xen security update |
Informations | |||
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Name | DSA-3729 | First vendor Publication | 2016-12-07 |
Vendor | Debian | Last vendor Modification | 2016-12-07 |
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:L/Au:N/C:C/I:C/A:C) | |||
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Cvss Base Score | 7.2 | Attack Range | Local |
Cvss Impact Score | 10 | Attack Complexity | Low |
Cvss Expoit Score | 3.9 | Authentication | None Required |
Calculate full CVSS 2.0 Vectors scores |
Detail
Multiple vulnerabilities have been discovered in the Xen hypervisor. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2016-7777 (XSA-190) Jan Beulich from SUSE discovered that Xen does not properly honor CR0.TS and CR0.EM for x86 HVM guests, potentially allowing guest users to read or modify FPU, MMX, or XMM register state information belonging to arbitrary tasks on the guest by modifying an instruction while the hypervisor is preparing to emulate it. CVE-2016-9379, CVE-2016-9380 (XSA-198) Daniel Richman and Gabor Szarka of the Cambridge University Student-Run Computing Facility discovered that pygrub, the boot loader emulator, fails to quote (or sanity check) its results when reporting them to its caller. A malicious guest administrator can take advantage of this flaw to cause an information leak or denial of service. CVE-2016-9382 (XSA-192) Jan Beulich of SUSE discovered that Xen does not properly handle x86 task switches to VM86 mode. A unprivileged guest process can take advantage of this flaw to crash the guest or, escalate its privileges to that of the guest operating system. CVE-2016-9383 (XSA-195) George Dunlap of Citrix discovered that the Xen x86 64-bit bit test instruction emulation is broken. A malicious guest can take advantage of this flaw to modify arbitrary memory, allowing for arbitrary code execution, denial of service (host crash), or information leaks. CVE-2016-9385 (XSA-193) Andrew Cooper of Citrix discovered that Xen's x86 segment base write emulation lacks canonical address checks. A malicious guest administrator can take advantage of this flaw to crash the host, leading to a denial of service. CVE-2016-9386 (XSA-191) Andrew Cooper of Citrix discovered that x86 null segments are not always treated as unusable. An unprivileged guest user program may be able to elevate its privilege to that of the guest operating system. For the stable distribution (jessie), these problems have been fixed in version 4.4.1-9+deb8u8. We recommend that you upgrade your xen packages. |
Original Source
Url : http://www.debian.org/security/2016/dsa-3729 |
CWE : Common Weakness Enumeration
% | Id | Name |
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57 % | CWE-20 | Improper Input Validation |
29 % | CWE-264 | Permissions, Privileges, and Access Controls |
14 % | CWE-362 | Race Condition |
CPE : Common Platform Enumeration
Nessus® Vulnerability Scanner
Date | Description |
---|---|
2017-10-13 | Name : The remote OracleVM host is missing one or more security updates. File : oraclevm_OVMSA-2017-0153.nasl - Type : ACT_GATHER_INFO |
2017-01-03 | Name : The remote openSUSE host is missing a security update. File : openSUSE-2017-5.nasl - Type : ACT_GATHER_INFO |
2017-01-03 | Name : The remote openSUSE host is missing a security update. File : openSUSE-2017-4.nasl - Type : ACT_GATHER_INFO |
2017-01-03 | Name : The remote Gentoo host is missing one or more security-related patches. File : gentoo_GLSA-201612-56.nasl - Type : ACT_GATHER_INFO |
2016-12-27 | Name : The remote SUSE host is missing one or more security updates. File : suse_SU-2016-3273-1.nasl - Type : ACT_GATHER_INFO |
2016-12-20 | Name : The remote SUSE host is missing one or more security updates. File : suse_SU-2016-3174-1.nasl - Type : ACT_GATHER_INFO |
2016-12-20 | Name : The remote SUSE host is missing one or more security updates. File : suse_SU-2016-3174-1.nasl - Type : ACT_GATHER_INFO |
2016-12-16 | Name : The remote openSUSE host is missing a security update. File : openSUSE-2016-1477.nasl - Type : ACT_GATHER_INFO |
2016-12-14 | Name : The remote SUSE host is missing one or more security updates. File : suse_SU-2016-3156-1.nasl - Type : ACT_GATHER_INFO |
2016-12-13 | Name : The remote SUSE host is missing one or more security updates. File : suse_SU-2016-3083-1.nasl - Type : ACT_GATHER_INFO |
2016-12-12 | Name : The remote SUSE host is missing one or more security updates. File : suse_SU-2016-3067-1.nasl - Type : ACT_GATHER_INFO |
2016-12-08 | Name : The remote Xen hypervisor installation is missing a security update. File : xen_server_XSA-198.nasl - Type : ACT_GATHER_INFO |
2016-12-08 | Name : The remote SUSE host is missing one or more security updates. File : suse_SU-2016-3044-1.nasl - Type : ACT_GATHER_INFO |
2016-12-08 | Name : The remote Debian host is missing a security-related update. File : debian_DSA-3729.nasl - Type : ACT_GATHER_INFO |
2016-12-05 | Name : The remote FreeBSD host is missing a security-related update. File : freebsd_pkg_53dbd096ba4d11e6ae1b002590263bf5.nasl - Type : ACT_GATHER_INFO |
2016-12-05 | Name : The remote FreeBSD host is missing a security-related update. File : freebsd_pkg_59f79c99ba4d11e6ae1b002590263bf5.nasl - Type : ACT_GATHER_INFO |
2016-12-05 | Name : The remote FreeBSD host is missing a security-related update. File : freebsd_pkg_56f0f11eba4d11e6ae1b002590263bf5.nasl - Type : ACT_GATHER_INFO |
2016-12-05 | Name : The remote FreeBSD host is missing a security-related update. File : freebsd_pkg_523bb0b7ba4d11e6ae1b002590263bf5.nasl - Type : ACT_GATHER_INFO |
2016-12-05 | Name : The remote FreeBSD host is missing a security-related update. File : freebsd_pkg_50ac2e96ba4d11e6ae1b002590263bf5.nasl - Type : ACT_GATHER_INFO |
2016-12-05 | Name : The remote FreeBSD host is missing a security-related update. File : freebsd_pkg_4d7cf654ba4d11e6ae1b002590263bf5.nasl - Type : ACT_GATHER_INFO |
2016-12-05 | Name : The remote Fedora host is missing a security update. File : fedora_2016-999e1a6927.nasl - Type : ACT_GATHER_INFO |
2016-12-05 | Name : The remote Fedora host is missing a security update. File : fedora_2016-95c104a4c6.nasl - Type : ACT_GATHER_INFO |
2016-12-05 | Name : The remote Fedora host is missing a security update. File : fedora_2016-68b71978a1.nasl - Type : ACT_GATHER_INFO |
2016-12-05 | Name : The remote host is affected by multiple vulnerabilities. File : citrix_xenserver_CTX218775.nasl - Type : ACT_GATHER_INFO |
2016-11-25 | Name : The remote Debian host is missing a security update. File : debian_DLA-720.nasl - Type : ACT_GATHER_INFO |
2016-11-23 | Name : The remote OracleVM host is missing one or more security updates. File : oraclevm_OVMSA-2016-0166.nasl - Type : ACT_GATHER_INFO |
2016-11-23 | Name : The remote OracleVM host is missing one or more security updates. File : oraclevm_OVMSA-2016-0165.nasl - Type : ACT_GATHER_INFO |
2016-11-23 | Name : The remote OracleVM host is missing one or more security updates. File : oraclevm_OVMSA-2016-0164.nasl - Type : ACT_GATHER_INFO |
2016-11-15 | Name : The remote Gentoo host is missing one or more security-related patches. File : gentoo_GLSA-201611-09.nasl - Type : ACT_GATHER_INFO |
2016-11-15 | Name : The remote Fedora host is missing a security update. File : fedora_2016-81e5a36d8c.nasl - Type : ACT_GATHER_INFO |
2016-11-04 | Name : The remote Debian host is missing a security update. File : debian_DLA-699.nasl - Type : ACT_GATHER_INFO |
2016-10-20 | Name : The remote Xen hypervisor installation is missing a security update. File : xen_server_XSA-190.nasl - Type : ACT_GATHER_INFO |
2016-10-14 | Name : The remote Fedora host is missing a security update. File : fedora_2016-4c407cd849.nasl - Type : ACT_GATHER_INFO |
2016-10-14 | Name : The remote Fedora host is missing a security update. File : fedora_2016-689f240960.nasl - Type : ACT_GATHER_INFO |
Alert History
Date | Informations |
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2017-01-26 12:07:48 |
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2016-12-09 13:25:25 |
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2016-12-08 00:23:07 |
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