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CVE-2010-4247

Status Candidate

Overview

The do_block_io_op function in (1) drivers/xen/blkback/blkback.c and (2) drivers/xen/blktap/blktap.c in Xen before 3.4.0 for the Linux kernel 2.6.18, and possibly other versions, allows guest OS users to cause a denial of service (infinite loop and CPU consumption) via a large production request index to the blkback or blktap back-end drivers. NOTE: some of these details are obtained from third party information.

Related Files

Ubuntu Security Notice USN-1170-1
Posted Jul 16, 2011
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1170-1 - Dan Rosenberg discovered that multiple terminal ioctls did not correctly initialize structure memory. A local attacker could exploit this to read portions of kernel stack memory, leading to a loss of privacy. It was discovered that Xen did not correctly handle certain block requests. A local attacker in a Xen guest could cause the Xen host to use all available CPU resources, leading to a denial of service. Various other issues were also addressed.

tags | advisory, denial of service, kernel, local
systems | linux, ubuntu
advisories | CVE-2010-4076, CVE-2010-4077, CVE-2010-4247, CVE-2010-4526, CVE-2011-0726, CVE-2011-1163, CVE-2011-1577, CVE-2011-1745, CVE-2011-1746, CVE-2011-1747, CVE-2011-2022
MD5 | 909b3fb287fb01361d24f320d5126426
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