Incorrect default permissions in Google Android - CVE-2020-0009
Published: January 8, 2020 / Updated: August 8, 2020
Vulnerability identifier: #VU34895
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-0009
CWE-ID: CWE-276
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local authenticated user to manipulate data.
In calc_vm_may_flags of ashmem.c, there is a possible arbitrary write to shared memory due to a permissions bypass. This could lead to local escalation of privilege by corrupting memory shared between processes, with no additional execution privileges needed. User interaction is not needed for exploitation. Product: Android Versions: Android kernel Android ID: A-142938932
Affected software
Google Android
Slackware Linux
linux-4.4.217/kernel-generic
linux-4.4.217/kernel-huge
linux-4.4.217/kernel-modules
linux-4.4.217/kernel-headers
Slackware Linux
linux-4.4.217/kernel-generic
linux-4.4.217/kernel-huge
linux-4.4.217/kernel-modules
linux-4.4.217/kernel-headers
How to mitigate CVE-2020-0009
Install update from vendor's website.
linux-4.4.217/kernel-generic - update to 4.4.217
linux-4.4.217/kernel-huge - update to 4.4.217
linux-4.4.217/kernel-modules - update to 4.4.217
linux-4.4.217/kernel-headers - update to 4.4.217_smp
linux-4.4.217/kernel-huge - update to 4.4.217
linux-4.4.217/kernel-modules - update to 4.4.217
linux-4.4.217/kernel-headers - update to 4.4.217_smp