SB2016081106 - Improper access control in xen (Alpine package)
Published: August 11, 2016
Security Bulletin ID
SB2016081106
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Improper access control (CVE-ID: CVE-2016-6258)
The vulnerability allows a local authenticated user to execute arbitrary code.
The PV pagetable code in arch/x86/mm.c in Xen 4.7.x and earlier allows local 32-bit PV guest OS administrators to gain host OS privileges by leveraging fast-paths for updating pagetable entries.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=a80b91506c3d39fd6d12fe94a65dd4a313261546
- https://git.alpinelinux.org/aports/commit/?id=68368249e3421886c66d79df3bd184f6ff617041
- https://git.alpinelinux.org/aports/commit/?id=59d51c1852e15d7d5e6d20ca1c5e19b137c2ea37
- https://git.alpinelinux.org/aports/commit/?id=93cedf0264ea23d61efd07fa82126f2f9e375b20
- https://git.alpinelinux.org/aports/commit/?id=d0a7fcca4e82f4ff531083fa762975ee6b0ec9f4