SB2017091341 - Privilege escalation in xen (Alpine package)
Published: September 13, 2017
Security Bulletin ID
SB2017091341
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Privilege escalation (CVE-ID: CVE-2017-12137)
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/U:Green
The vulnerability allows a local attacker on a PV guest system to gain elevated privileges on the host system.
The weakness exists due to a flaw in the processing of guest-nominated L1 pagetable entries when mapping a grant reference. A local attacker on a PV guest system supply specially crafted data and execute arbitrary code on the host system.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=777808728eee590185d5d0f60357c3e334fa40cd
- https://git.alpinelinux.org/aports/commit/?id=88fbbb90ca25cd6378753538feb327abf36a30ac
- https://git.alpinelinux.org/aports/commit/?id=91aea7ba80331c34e950b9ccb02e757d4471325c
- https://git.alpinelinux.org/aports/commit/?id=4e31617722f0cbfc0e07928c7cc27aca51e667d8
- https://git.alpinelinux.org/aports/commit/?id=d19612e9b3adfc33b29c071630e17fd1a15f36cd
- https://git.alpinelinux.org/aports/commit/?id=48b94ffb4d6e3dda3dabb22b8c08089814fb86dc
- https://git.alpinelinux.org/aports/commit/?id=605bcdc44def7408f05991fd6ecf6f7dfe7e683c