SuSE 11.1 Security Update : Xen (SAT Patch Number 6653)

Xen was updated to fix several security issues : - A xen HVM guest destroy p2m teardown host DoS vulnerability was fixed, where malicious guest could lock/crash the host. CVE-2012-3433 - A xen HVM guest user mode MMIO emulation DoS was fixed. CVE-2012-3432 - The xen pv bootloader doesn't check th...

Hypervisor crash due to incorrect ASSERT (debug build only)

ISSUE DESCRIPTION A change to an internal interface within the hypervisor invalidated an ASSERT in a caller of that API. This code path is exposed to PV guests via a hypercall allowing administrators of PV guests to crash the hypervisor if it is built with debugging enabled. IMPACT Malicious...

Fedora 16 : xen-4.1.3-6.fc16 (2012-19828)

A guest can cause xen to crash XSA-26, CVE-2012-5510 883082 An HVM guest can cause xen to run slowly or crash XSA-27, CVE-2012-5511 883084 An HVM guest can cause xen to crash or leak information XSA-28, CVE-2012-5512 883085 A PV guest can cause xen to crash and might be able escalate privileges...

CVE-2012-5525

The getpagefromgfn hypercall function in Xen 4.2 allows local PV guest OS administrators to cause a denial of service crash via a crafted GFN that triggers a buffer over-read...

CVE-2012-5513

The XENMEMexchange handler in Xen 4.2 and earlier does not properly check the memory address, which allows local PV guest OS administrators to cause a denial of service crash or possibly gain privileges via unspecified vectors that overwrite memory in the hypervisor reserved range...

CVE-2012-5525

The getpagefromgfn hypercall function in Xen 4.2 allows local PV guest OS administrators to cause a denial of service crash via a crafted GFN that triggers a buffer over-read...

500 Websites defaced by Anonymous Supporters

Hacker Supporting Anonymous Group, with his nickname - "PVE.rr0r" hack 516 websites. Deface page shows a very cool animated Anonymous logo with text "We unite as one but no one can divide us. Expect us!" Because hacker intention was not to harm the website, so he has not change or delete any file...

several hypercalls do not validate input GFNs

ISSUE DESCRIPTION The function getpagefromgfn does not validate its input GFN. An invalid GFN passed to a hypercall which uses this function will cause the hypervisor to read off the end of the frame table and potentially crash. IMPACT A malicious guest administrator of a PV guest can cause Xen t...

XENMEM_exchange may overwrite hypervisor memory

ISSUE DESCRIPTION The handler for XENMEMexchange accesses guest memory without range checking the guest provided addresses, thus allowing these accesses to include the hypervisor reserved range. IMPACT A malicious guest administrator can cause Xen to crash. If the out of address space bounds acce...

CVE-2012-0218: Undefined Security Weakness

Xen 3.4, 4.0, and 4.1, when the guest OS has not registered a handler for a syscall or sysenter instruction, does not properly clear a flag for exception injection when injecting a General Protection Fault, which allows local PV guest OS users to cause a denial of service guest crash by later...

Fedora 17 : xen-4.1.3-6.fc17 (2012-18242)

A guest can block a cpu by setting a bad VCPU deadline XSA 20, CVE-2012-4535 876198 HVM guest can use invalid pirq values to crash xen XSA 21, CVE-2012-4536 876200 HVM guest can exhaust p2m table crashing xen XSA 22, CVE-2012-4537 876203 PAE HVM guest can crash hypervisor XSA-23, CVE-2012-4538...

CVE-2012-4539

Xen 4.0 through 4.2, when running 32-bit x86 PV guests on 64-bit hypervisors, allows local guest OS administrators to cause a denial of service infinite loop and hang or crash via invalid arguments to GNTTABOPgetstatusframes, aka "Grant table hypercall infinite loop DoS vulnerability."...

DEBIAN-CVE-2012-4539

Xen 4.0 through 4.2, when running 32-bit x86 PV guests on 64-bit hypervisors, allows local guest OS administrators to cause a denial of service infinite loop and hang or crash via invalid arguments to GNTTABOPgetstatusframes, aka "Grant table hypercall infinite loop DoS vulnerability."...

CVE-2012-4539

This CVE affects Xen hypervisor versions 4.0–4.2 when running 32-bit PV guests on 64-bit hosts. The vulnerability is triggered by invalid arguments to GNTTABOP_get_status_frames in the grant table hypercall, allowing a local guest OS administrator to cause a denial-of-service (infinite loop, hang...

CVE-2012-4539: Undefined Security Weakness

Xen 4.0 through 4.2, when running 32-bit x86 PV guests on 64-bit hypervisors, allows local guest OS administrators to cause a denial of service infinite loop and hang or crash via invalid arguments to GNTTABOPgetstatusframes, aka "Grant table hypercall infinite loop DoS vulnerability."...

Unhooking empty PAE entries DoS vulnerability

ISSUE DESCRIPTION The HVMOPpagetabledying hypercall does not correctly check the caller's pagetable state, leading to a hypervisor crash. IMPACT An HVM guest running on shadow pagetables that is, not HAP can cause the hypervisor to crash. VULNERABLE SYSTEMS All Xen versions from 4.0 onwards are...

CVE-2012-4544

The PV domain builder in Xen 4.2 and earlier does not validate the size of the kernel or ramdisk 1 before or 2 after decompression, which allows local guest administrators to cause a denial of service domain 0 memory consumption via a crafted a kernel or b ramdisk...

Design/Logic Flaw

The PV domain builder in Xen 4.2 and earlier does not validate the size of the kernel or ramdisk 1 before or 2 after decompression, which allows local guest administrators to cause a denial of service domain 0 memory consumption via a crafted a kernel or b ramdisk...

CVE-2012-4544

The PV domain builder in Xen 4.2 and earlier does not validate the size of the kernel or ramdisk 1 before or 2 after decompression, which allows local guest administrators to cause a denial of service domain 0 memory consumption via a crafted a kernel or b ramdisk...

CVE-2012-4544

The PV domain builder in Xen 4.2 and earlier does not validate the size of the kernel or ramdisk 1 before or 2 after decompression, which allows local guest administrators to cause a denial of service domain 0 memory consumption via a crafted a kernel or b ramdisk...