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CVE-2019-15031

Status Candidate

Overview

In the Linux kernel through 5.2.14 on the powerpc platform, a local user can read vector registers of other users' processes via an interrupt. To exploit the venerability, a local user starts a transaction (via the hardware transactional memory instruction tbegin) and then accesses vector registers. At some point, the vector registers will be corrupted with the values from a different local Linux process, because MSR_TM_ACTIVE is misused in arch/powerpc/kernel/process.c.

Related Files

Ubuntu Security Notice USN-4135-1
Posted Sep 18, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4135-1 - Peter Pi discovered a buffer overflow in the virtio network backend implementation in the Linux kernel. An attacker in a guest may be able to use this to cause a denial of service or possibly execute arbitrary code in the host OS. It was discovered that the Linux kernel on PowerPC architectures did not properly handle Facility Unavailable exceptions in some situations. A local attacker could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, denial of service, overflow, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2019-14835, CVE-2019-15030, CVE-2019-15031
MD5 | 95e7c4187500bf769ca3eaa74251777d
Ubuntu Security Notice USN-4135-2
Posted Sep 18, 2019
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4135-2 - Peter Pi discovered a buffer overflow in the virtio network backend implementation in the Linux kernel. An attacker in a guest may be able to use this to cause a denial of service or possibly execute arbitrary code in the host OS. It was discovered that the Linux kernel on PowerPC architectures did not properly handle Facility Unavailable exceptions in some situations. A local attacker could use this to expose sensitive information. Various other issues were also addressed.

tags | advisory, denial of service, overflow, arbitrary, kernel, local
systems | linux, ubuntu
advisories | CVE-2019-14835, CVE-2019-15030, CVE-2019-15031
MD5 | d96f38d38b0c0c92e88f66fa91d9dbfa
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