ID CVE-2016-9818
Summary 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.
References
Vulnerable Configurations
  • Xen 4.7.0
    cpe:2.3:o:xen:xen:4.7.0
  • Xen 4.7.1
    cpe:2.3:o:xen:xen:4.7.1
CVSS
Base: 4.9 (as of 28-02-2017 - 09:52)
Impact:
Exploitability:
CWE CWE-284
CAPEC
  • Embedding Scripts within Scripts
    An attack of this type exploits a programs' vulnerabilities that are brought on by allowing remote hosts to execute scripts. The attacker leverages this capability to execute scripts to execute his/her own script by embedding it within other scripts that the target software is likely to execute. The attacker must have the ability to inject script into script that is likely to be executed. If this is done, then the attacker can potentially launch a variety of probes and attacks against the web server's local environment, in many cases the so-called DMZ, back end resources the web server can communicate with, and other hosts. With the proliferation of intermediaries, such as Web App Firewalls, network devices, and even printers having JVMs and Web servers, there are many locales where an attacker can inject malicious scripts. Since this attack pattern defines scripts within scripts, there are likely privileges to execute said attack on the host. Of course, these attacks are not solely limited to the server side, client side scripts like Ajax and client side JavaScript can contain malicious scripts as well. In general all that is required is for there to be sufficient privileges to execute a script, but not protected against writing.
  • Signature Spoofing by Key Theft
    An attacker obtains an authoritative or reputable signer's private signature key by theft and then uses this key to forge signatures from the original signer to mislead a victim into performing actions that benefit the attacker.
Access
VectorComplexityAuthentication
LOCAL LOW NONE
Impact
ConfidentialityIntegrityAvailability
NONE NONE COMPLETE
nessus via4
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2016-CC2916DCF4.NASL
    description 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.
    last seen 2019-02-21
    modified 2017-03-06
    plugin id 96025
    published 2016-12-20
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=96025
    title Fedora 23 : xen (2016-cc2916dcf4)
  • NASL family Fedora Local Security Checks
    NASL id FEDORA_2016-BCBAE0781F.NASL
    description 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.
    last seen 2019-02-21
    modified 2017-03-06
    plugin id 96113
    published 2016-12-27
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=96113
    title Fedora 24 : xen (2016-bcbae0781f)
  • NASL family Gentoo Local Security Checks
    NASL id GENTOO_GLSA-201612-56.NASL
    description 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.
    last seen 2019-02-21
    modified 2017-01-31
    plugin id 96231
    published 2017-01-03
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=96231
    title GLSA-201612-56 : Xen: Multiple vulnerabilities
refmap via4
bid 94581
confirm
gentoo GLSA-201612-56
mlist
  • [oss-security] 20161129 Xen Security Advisory 201 - ARM guests may induce host asynchronous abort
  • [oss-security] 20161204 Re: Xen Security Advisory 201 - ARM guests may induce host asynchronous abort
sectrack 1037358
Last major update 28-02-2017 - 09:54
Published 27-02-2017 - 17:59
Last modified 27-07-2017 - 21:29
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