- ------------------------------------------------------------------------- Debian Security Advisory DSA-3663-1 This email address is being protected from spambots. You need JavaScript enabled to view it. 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: This email address is being protected from spambots. You need JavaScript enabled to view it.
Debian: DSA-3663-1: xen security update
Multiple vulnerabilities have been discovered in the Xen hypervisor. The Common Vulnerabilities and Exposures project identifies the following problems:
