8.2 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
7.2 High
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
Debian Security Advisory DSA-3663-1 [email protected]
https://www.debian.org/security/ Salvatore Bonaccorso
September 09, 2016 https://www.debian.org/security/faq
Package : xen
CVE ID : CVE-2016-7092 CVE-2016-7094 CVE-2016-7154
Multiple vulnerabilities have been discovered in the Xen hypervisor. The
Common Vulnerabilities and Exposures project identifies the following
problems:
CVE-2016-7092 (XSA-185)
Jeremie Boutoille of Quarkslab and Shangcong Luan of Alibaba
discovered a flaw in the handling of L3 pagetable entries, allowing
a malicious 32-bit PV guest administrator can escalate their
privilege to that of the host.
CVE-2016-7094 (XSA-187)
x86 HVM guests running with shadow paging use a subset of the x86
emulator to handle the guest writing to its own pagetables. Andrew
Cooper of Citrix discovered that there are situations a guest can
provoke which result in exceeding the space allocated for internal
state. A malicious HVM guest administrator can cause Xen to fail a
bug check, causing a denial of service to the host.
CVE-2016-7154 (XSA-188)
Mikhail Gorobets of Advanced Threat Research, Intel Security
discovered a use after free flaw in the FIFO event channel code. A
malicious guest administrator can crash the host, leading to a
denial of service. Arbitrary code execution (and therefore privilege
escalation), and information leaks, cannot be excluded.
For the stable distribution (jessie), these problems have been fixed in
version 4.4.1-9+deb8u7.
We recommend that you upgrade your xen packages.
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
Mailing list: [email protected]
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 8 | amd64 | xen-hypervisor-4.4-amd64 | < 4.4.1-9+deb8u7 | xen-hypervisor-4.4-amd64_4.4.1-9+deb8u7_amd64.deb |
Debian | 8 | amd64 | xen-system-amd64 | < 4.4.1-9+deb8u7 | xen-system-amd64_4.4.1-9+deb8u7_amd64.deb |
Debian | 8 | amd64 | libxen-dev | < 4.4.1-9+deb8u7 | libxen-dev_4.4.1-9+deb8u7_amd64.deb |
Debian | 7 | i386 | libxen-dev | < 4.1.6.lts1-2 | libxen-dev_4.1.6.lts1-2_i386.deb |
Debian | 7 | amd64 | xen-hypervisor-4.1-amd64 | < 4.1.6.lts1-2 | xen-hypervisor-4.1-amd64_4.1.6.lts1-2_amd64.deb |
Debian | 7 | i386 | libxen-4.1 | < 4.1.6.lts1-2 | libxen-4.1_4.1.6.lts1-2_i386.deb |
Debian | 8 | armhf | xen-utils-4.4 | < 4.4.1-9+deb8u7 | xen-utils-4.4_4.4.1-9+deb8u7_armhf.deb |
Debian | 7 | amd64 | libxenstore3.0 | < 4.1.6.lts1-2 | libxenstore3.0_4.1.6.lts1-2_amd64.deb |
Debian | 8 | armhf | xenstore-utils | < 4.4.1-9+deb8u7 | xenstore-utils_4.4.1-9+deb8u7_armhf.deb |
Debian | 7 | all | xen-utils-common | < 4.1.6.lts1-2 | xen-utils-common_4.1.6.lts1-2_all.deb |
8.2 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
7.2 High
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C