Excessive checking in compatibility mode hypercall argument translation

ISSUE DESCRIPTION The hypercall argument translation needed for 32-bit guests running on 64-bit hypervisors performs checks on the final register state. These checks cover all registers potentially holding hypercall arguments, not just the ones actually doing so for the hypercall being processed,...

openSUSE Security Update : XEN (openSUSE-SU-2012:1572-1)

This security update of XEN fixes various bugs and security issues. - Upstream patch 26088-xend-xml-filesize-check.patch - bnc787163 - CVE-2012-4544: xen: Domain builder Out-of- memory due to malicious kernel/ramdisk XSA 25 CVE-2012-4544-xsa25.patch - bnc779212 - CVE-2012-4411: XEN / qemu: guest...

CVE-2014-1895

Off-by-one error in the flasksecurityavccachestats function in xsm/flask/flaskop.c in Xen 4.2.x and 4.3.x, when the maximum number of physical CPUs are in use, allows local users to cause a denial of service host crash or obtain sensitive information from hypervisor memory by leveraging a...

CVE-2014-1894

Multiple integer overflows in unspecified suboperations in the flask hypercall in Xen 3.2.x and earlier, when XSM is enabled, allow local users to cause a denial of service processor fault via unspecified vectors, a different vulnerability than CVE-2014-1891, CVE-2014-1892, and CVE-2014-1893...

CVE-2014-1891

Multiple integer overflows in the 1 FLASKGETBOOL, 2 FLASKSETBOOL, 3 FLASKUSER, and 4 FLASKCONTEXTTOSID suboperations in the flask hypercall in Xen 4.3.x, 4.2.x, 4.1.x, 3.2.x, and earlier, when XSM is enabled, allow local users to cause a denial of service processor fault via unspecified vectors, ...

CVE-2014-1894

Multiple integer overflows in unspecified suboperations in the flask hypercall in Xen 3.2.x and earlier, when XSM is enabled, allow local users to cause a denial of service processor fault via unspecified vectors, a different vulnerability than CVE-2014-1891, CVE-2014-1892, and CVE-2014-1893...

CVE-2014-1891

Multiple integer overflows in the 1 FLASKGETBOOL, 2 FLASKSETBOOL, 3 FLASKUSER, and 4 FLASKCONTEXTTOSID suboperations in the flask hypercall in Xen 4.3.x, 4.2.x, 4.1.x, 3.2.x, and earlier, when XSM is enabled, allow local users to cause a denial of service processor fault via unspecified vectors, ...

CVE-2014-1893

Multiple integer overflows in the 1 FLASKGETBOOL and 2 FLASKSETBOOL suboperations in the flask hypercall in Xen 4.1.x, 3.3.x, 3.2.x, and earlier, when XSM is enabled, allow local users to cause a denial of service processor fault via unspecified vectors, a different vulnerability than...

Off-by-one error in FLASK_AVC_CACHESTAT hypercall

ISSUE DESCRIPTION The FLASKAVCCACHESTAT hypercall, which provides access to per-cpu statistics on the Flask security policy, incorrectly validates the CPU for which statistics are being requested. IMPACT An attacker can cause the hypervisor to read past the end of an array. This may result in...

CVE-2013-4553

The XENDOMCTLgetmemlist hypercall in Xen 3.4.x through 4.3.x possibly 4.3.1 does not always obtain the pagealloclock and mmrwlock in the same order, which allows local guest administrators to cause a denial of service host deadlock...

CVE-2013-4553

The XENDOMCTLgetmemlist hypercall in Xen 3.4.x through 4.3.x possibly 4.3.1 does not always obtain the pagealloclock and mmrwlock in the same order, which allows local guest administrators to cause a denial of service host deadlock...

Debian Security Advisory DSA 2582-1 (xen - several vulnerabilities)

Multiple denial of service vulnerabilities have been discovered in the Xen Hypervisor. One of the issue CVE-2012-5513 could even lead to privilege escalation from guest to host. Some of the recently published Xen Security Advisories XSA 25 and 28 are not fixed by this update and should be fixed i...

Debian Security Advisory DSA 2666-1 (xen - several vulnerabilities)

Multiple vulnerabilities have been discovered in the Xen hypervisor. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2013-1918 XSA 45 several long latency operations are not preemptible. Some page table manipulation operations for PV guests were not made...

grant table hypercall acquire/release imbalance

ISSUE DESCRIPTION When releasing a non-v1 non-transitive grant after doing a grant copy operation, Xen incorrectly recurses as if for a transitive grant and releases an unrelated grant reference. IMPACT A malicious guest administrator can cause undefined behaviour; depending on the dom0 kernel a...

SuSE 11.2 Security Update : Xen (SAT Patch Number 7018)

XEN was updated to fix various bugs and security issues : The following security issues have been fixed : - xen: Domain builder Out-of-memory due to malicious kernel/ramdisk XSA 25. CVE-2012-4544 - XEN / qemu: guest administrator can access qemu monitor console XSA-19. CVE-2012-4411 - xen: Timer...

Design/Logic Flaw

The getpagetype function in xen/arch/x86/mm.c in Xen 4.2, when debugging is enabled, allows local PV or HVM guest administrators to cause a denial of service assertion failure and hypervisor crash via unspecified vectors related to a hypercall...

CVE-2013-0154

The getpagetype function in xen/arch/x86/mm.c in Xen 4.2, when debugging is enabled, allows local PV or HVM guest administrators to cause a denial of service assertion failure and hypervisor crash via unspecified vectors related to a hypercall...

CVE-2013-0154

The getpagetype function in xen/arch/x86/mm.c in Xen 4.2, when debugging is enabled, allows local PV or HVM guest administrators to cause a denial of service assertion failure and hypervisor crash via unspecified vectors related to a hypercall...

CVE-2013-0154

CVE-2013-0154 affects Xen 4.2 (and related builds) where, in the get_page_type function of xen/arch/x86/mm.c, if debugging is enabled, local PV/HVM guest admins can trigger an assertion failure and hypervisor crash via certain hypercall-related vectors. The issue is a denial of service causing hy...

CVE-2013-0154

The getpagetype function in xen/arch/x86/mm.c in Xen 4.2, when debugging is enabled, allows local PV or HVM guest administrators to cause a denial of service assertion failure and hypervisor crash via unspecified vectors related to a hypercall...