Input validation error in Linux kernel - CVE-2019-15030
Published: September 13, 2019 / Updated: June 1, 2020
Vulnerability identifier: #VU28402
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2019-15030
CWE-ID: CWE-20
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local authenticated user to #BASIC_IMPACT#.
In the Linux kernel through 5.2.14 on the powerpc platform, a local user can read vector registers of other users' processes via a Facility Unavailable exception. 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 of a missing arch/powerpc/kernel/process.c check.
How to mitigate CVE-2019-15030
Install update from vendor's website.
Sources
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.193
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.144
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.73
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2.15
- https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.3