Auth bypass in Linux Kernel
CVE-2019-15030
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.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L.
EPSS exploit prediction
EPSS: 0.005 (36.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Linux Kernel
- Canonical Ubuntu Linux — versions 16.04, 18.04, 19.04
- openSUSE Leap — versions 15.0, 15.1
- Red Hat Enterprise Linux — versions 7.0, 8.0
Weakness classification (CWE)
References
- git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ (Exploit, Patch, Mailing List, Vendor Advisory)
- www.openwall.com/lists/oss-security/2019/09/10/3 (Patch, Mailing List, Third Party Advisory)
- usn.ubuntu.com/4135-2/ (vendor-advisory, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-09/msg00064.html (vendor-advisory, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2019-09/msg00066.html (vendor-advisory, Third Party Advisory)
- usn.ubuntu.com/4135-1/ (vendor-advisory, Third Party Advisory)
- security.netapp.com/advisory/ntap-20191004-0001/ (Third Party Advisory)
- access.redhat.com/errata/RHSA-2020:0740 (vendor-advisory)
Frequently asked questions
- What is CVE-2019-15030?
- CVE-2019-15030 is a medium-severity vulnerability in Linux Kernel, classified under Missing Authorization. CVSS score: 4.4/10. Published 2019-09-13.
- How severe is CVE-2019-15030?
- Medium severity. CVSS v3 base score is 4.4 out of 10.