Xen through 4.7.x allows local ARM guest OS users to cause a denial of service (host crash) via vectors involving a (1) data or (2) prefetch abort with the ESR_EL2.EA bit set.

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

  - Xen through 4.7.x allows local ARM guest OS users to cause a denial of service (host panic) by sending an
    asynchronous abort. (CVE-2016-9815)

  - Xen through 4.7.x allows local ARM guest OS users to cause a denial of service (host crash) via vectors
    involving an asynchronous abort while at EL2. (CVE-2016-9816)

  - Xen through 4.7.x allows local ARM guest OS users to cause a denial of service (host crash) via vectors
    involving a (1) data or (2) prefetch abort with the ESR_EL2.EA bit set. (CVE-2016-9817)

  - Xen through 4.7.x allows local ARM guest OS users to cause a denial of service (host crash) via vectors
    involving an asynchronous abort while at HYP. (CVE-2016-9818)

  - CMPXCHG8B emulation in Xen 3.3.x through 4.7.x on x86 systems allows local HVM guest OS users to obtain
    sensitive information from host stack memory via a "supposedly-ignored" operand size prefix.
    (CVE-2016-9932)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Xen through 4.7.x allows local ARM guest OS users to cause a denial of service (host crash) via vectors     involving a (1) data or (2) prefetch abort with the ESR_EL2.EA bit set. (CVE-2016-9817)

Note that Nessus relies on the presence of the package as reported by the vendor.

There are packages installed that are affected by multiple vulnerabilities referenced in the following CVEs:

  - An issue was discovered in Xen through 4.10.x allowing guest OS users to cause a denial of service
    (hypervisor crash) or gain privileges by triggering a grant-table transition from v2 to v1.
    (CVE-2018-7541)

  - Xen through 4.7.x allows local ARM guest OS users to cause a denial of service (host panic) by sending an
    asynchronous abort. (CVE-2016-9815)

  - Xen through 4.7.x allows local ARM guest OS users to cause a denial of service (host crash) via vectors
    involving an asynchronous abort while at EL2. (CVE-2016-9816)

  - Xen through 4.7.x allows local ARM guest OS users to cause a denial of service (host crash) via vectors
    involving a (1) data or (2) prefetch abort with the ESR_EL2.EA bit set. (CVE-2016-9817)

  - Xen through 4.7.x allows local ARM guest OS users to cause a denial of service (host crash) via vectors
    involving an asynchronous abort while at HYP. (CVE-2016-9818)

The remote host is affected by the vulnerability described in GLSA-201612-56 (Xen: Multiple vulnerabilities)

    Multiple vulnerabilities have been discovered in Xen. Please review the       CVE identifiers referenced below for details.
  Impact :

    A local attacker could possibly execute arbitrary code with the       privileges of the process, could gain privileges on the host system,       cause a Denial of Service condition, or obtain sensitive information.
  Workaround :

    There is no known workaround at this time.

x86 CMPXCHG8B emulation fails to ignore operand size override [XSA-200, CVE-2016-9932] (#1404262)

----

ARM guests may induce host asynchronous abort [XSA-201, CVE-2016-9815, CVE-2016-9816, CVE-2016-9817, CVE-2016-9818] (#1399747) qemu: Divide by zero vulnerability in cirrus_do_copy (#1399055) [CVE-2016-9921, CVE-2016-9922] Qemu: 9pfs: memory leakage via proxy/handle callbacks (#1402278) qemu ioport array overflow [XSA-199, CVE-2016-9637]

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ARM guests may induce host asynchronous abort [XSA-201, CVE-2016-9815, CVE-2016-9816, CVE-2016-9817, CVE-2016-9818] (#1399747) qemu: Divide by zero vulnerability in cirrus_do_copy (#1399055) [CVE-2016-9921, CVE-2016-9922] Qemu: 9pfs: memory leakage via proxy/handle callbacks (#1402278) qemu ioport array overflow [XSA-199, CVE-2016-9637]

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

ID	Name	Product	Family	Severity
424710	Alpine: multiple xen packages: security update to 4.7.1-r3	Tenable Cloud Security	Alpine Linux Local Security Checks	low
424710	Alpine: multiple xen packages: security update to 4.7.1-r3	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	low
220141	Linux Distros Unpatched Vulnerability : CVE-2016-9817	Nessus	Misc.	medium
407863	Alpine: xen: security update to 4.6.3-r6	Tenable Cloud Security	Alpine Linux Local Security Checks	low
407863	Alpine: xen: security update to 4.6.3-r6	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	low
407861	Alpine: xen: security update to 4.6.3-r4	Tenable Cloud Security	Alpine Linux Local Security Checks	high
407861	Alpine: xen: security update to 4.6.3-r4	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	high
400951	Alpine: multiple xen packages: security update to 4.7.1-r1 (deprecated)	Tenable Cloud Security	Alpine Linux Local Security Checks	low
400951	Alpine: multiple xen packages: security update to 4.7.1-r1 (deprecated)	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	low
96231	GLSA-201612-56 : Xen: Multiple vulnerabilities	Nessus	Gentoo Local Security Checks	high
96113	Fedora 24 : xen (2016-bcbae0781f)	Nessus	Fedora Local Security Checks	high
96025	Fedora 23 : xen (2016-cc2916dcf4)	Nessus	Fedora Local Security Checks	high

Detections

Analytics

CVE-2016-9817

medium

Tenable Plugins

low

low

medium

low

low

high

high

low

low

high

high

high