SB2019010835 - Privilege escalation in xen (Alpine package)
Published: January 8, 2019
Security Bulletin ID
SB2019010835
CSH Severity
Low
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-2018-19962)
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows an adjacent attacker to gain elevated privileges on the target system.
The weakness exists on AMD x86 platforms due to small IOMMU mappings are unsafely combined into larger ones. An adjacent attacker can gain host OS privileges.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=f39fc76089047b3f9b0e1ec06aecb40cc1ac1786
- https://git.alpinelinux.org/aports/commit/?id=b1098f74cfa616c0046ba6c5f2d032ac2f1d8e02
- https://git.alpinelinux.org/aports/commit/?id=e28e1495e1510e8a1673d135dc5272813b38a0cf
- https://git.alpinelinux.org/aports/commit/?id=3157c8cf385f659174a6d95a9218bc3281359513