CVE-2015-7971

Xen 3.2.x through 4.6.x does not limit the number of printk console messages when logging certain pmu and profiling hypercalls, which allows local guests to cause a denial of service via a sequence of crafted 1 HYPERCALLxenoprofop hypercalls, which are not properly handled in the doxenoprofop...

CVE-2015-7813

Xen 4.4.x, 4.5.x, and 4.6.x does not limit the number of printk console messages when reporting unimplemented hypercalls, which allows local guests to cause a denial of service via a sequence of 1 HYPERVISORphysdevop hypercalls, which are not properly handled in the dophysdevop function in...

CVE-2015-7971

CVE-2015-7971 affects Xen 3.2.x through 4.6.x. The vulnerability arises from unbounded printk console message logging when handling pmu and profiling hypercalls (HYPERCALL_xenoprof_op and HYPERVISOR_xenpmu_op), as implemented in do_xenoprof_op (common/xenoprof.c) and do_xenpmu_op (arch/x86/cpu/vp...

CVE-2015-7813

Xen 4.4.x, 4.5.x, and 4.6.x does not limit the number of printk console messages when reporting unimplemented hypercalls, which allows local guests to cause a denial of service via a sequence of 1 HYPERVISORphysdevop hypercalls, which are not properly handled in the dophysdevop function in...

CVE-2015-7813: Undefined Security Weakness

Xen 4.4.x, 4.5.x, and 4.6.x does not limit the number of printk console messages when reporting unimplemented hypercalls, which allows local guests to cause a denial of service via a sequence of 1 HYPERVISORphysdevop hypercalls, which are not properly handled in the dophysdevop function in...

CVE-2015-7971: Undefined Security Weakness

Xen 3.2.x through 4.6.x does not limit the number of printk console messages when logging certain pmu and profiling hypercalls, which allows local guests to cause a denial of service via a sequence of crafted 1 HYPERCALLxenoprofop hypercalls, which are not properly handled in the doxenoprofop...

PT-2015-7623

Name of the Vulnerable Software and Affected Versions Xen versions 4.4.x through 4.6.x Description The issue allows local guests to cause a denial of service by reporting unimplemented hypercalls without limiting the number of printk console messages. This can be achieved through a sequence of...

x86: some pmu and profiling hypercalls log without rate limiting

ISSUE DESCRIPTION HYPERCALLxenoprofop and HYPERVISORxenpmuop log some errors and attempts at invalid operations. These log messages are not rate-limited, even though they can be triggered by guests. IMPACT A malicious guest could cause repeated logging to the hypervisor console, leading to a Deni...

xen-kernel -- some pmu and profiling hypercalls log without rate limiting

The Xen Project reports: HYPERCALLxenoprofop and HYPERVISORxenpmuop log some errors and attempts at invalid operations. These log messages are not rate-limited, even though they can be triggered by guests. A malicious guest could cause repeated logging to the hypervisor console, leading to a Deni...

PT-2015-7682

Name of the Vulnerable Software and Affected Versions Xen versions 4.0 through 4.6.x Description The issue allows local guest administrators or domains with certain permissions to cause a denial of service due to memory consumption. This can be achieved through a large number of domain "teardowns...

PT-2015-7684

Name of the Vulnerable Software and Affected Versions Xen versions 3.2.x through 4.6.x Description The issue allows local guests to cause a denial of service via a sequence of crafted hypercalls, specifically HYPERCALL xenoprof op or HYPERVISOR xenpmu op, which are not properly handled in the do...

FreeBSD : xen-kernel -- GNTTABOP_swap_grant_ref operation misbehavior (80e846ff-27eb-11e5-a4a5-002590263bf5)

The Xen Project reports : With the introduction of version 2 grant table operations, a version check became necessary for most grant table related hypercalls. The GNTTABOPswapgrantref call was lacking such a check. As a result, the subsequent code behaved as if version 2 was in use, when a guest...

Unbreakable Enterprise kernel security and bugfix update

2.6.39-400.250.2 - crypto: aesni - fix memory usage in GCM decryption Stephan Mueller Orabug: 21077389 CVE-2015-3331 2.6.39-400.250.1 - xen/pciback: Don't disable PCICOMMAND on PCI device reset. Konrad Rzeszutek Wilk Orabug: 20807440 CVE-2015-2150 - xen-blkfront: fix accounting of reqs when...

Debian DSA-3140-1 : xen - security update

Multiple security issues have been discovered in the Xen virtualisation solution which may result in denial of service, information disclosure or privilege escalation. - CVE-2014-8594 Roger Pau Monne and Jan Beulich discovered that incomplete restrictions on MMU update hypercalls may result in...

Debian Security Advisory DSA 3140-1 (xen - security update)

Multiple security issues have been discovered in the Xen virtualisation solution which may result in denial of service, information disclosure or privilege escalation. CVE-2014-8594 Roger Pau Monne and Jan Beulich discovered that incomplete restrictions on MMU update hypercalls may result in...

Fedora 20 : xen-4.3.3-5.fc20 (2014-15521)

Guest effectable page reference leak in MMUMACHPHYSUPDATE handling Insufficient restrictions on certain MMU update hypercalls, Missing privilege level checks in x86 emulation of far branches, Add fix for CVE-2014-0150 to qemu-dm, though it probably isn't exploitable from xen Note that Tenable...

OracleVM 3.1 : xen (OVMSA-2013-0087)

The remote OracleVM system is missing necessary patches to address critical security updates : - x86/HVM: only allow ring 0 guest code to make hypercalls Anything else would allow for privilege escalation. This is CVE-2013-4554 / XSA-76. CVE-2013-4554 - x86: restrict XENDOMCTLgetmemlist Coverity ...

openSUSE Security Update : xen (openSUSE-SU-2013:1876-1)

Xen was updated to 4.3.1 and also to fix various security issues and bugs : - bnc851749 - Xen service file does not call xend properly xend.service - Add missing requires to pciutils package for xend-tools - bnc851386 - xen: XSA-78: Insufficient TLB flushing in VT-d iommu code - Make -devel packa...

kernel: xen: hypercalls exposed to privilege rings 1 and 2 of HVM guests

Xen 3.0.3 through 4.1.x possibly 4.1.6.1, 4.2.x possibly 4.2.3, and 4.3.x possibly 4.3.1 does not properly prevent access to hypercalls, which allows local guest users to gain privileges via a crafted application running in ring 1 or 2...

Fedora 19 : xen-4.2.3-15.fc19 (2014-2188)

three security fixes: integer overflow in several XSM/Flask hypercalls XSA-84 Off-by-one error in FLASKAVCCACHESTAT hypercall XSA-85 libvchan failure handling malicious ring indexes XSA-86 Note that Tenable Network Security has extracted the preceding description block directly from the Fedora...