SB2016122012 - Information disclosure in xen (Alpine package)
Published: December 20, 2016
Security Bulletin ID
SB2016122012
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Information disclosure (CVE-ID: CVE-2016-9932)
CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local authenticated user to gain access to sensitive information.
CMPXCHG8B emulation in Xen 3.3.x through 4.7.x on x86 systems allows local HVM guest OS users to obtain sensitive information from host stack memory via a "supposedly-ignored" operand size prefix.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=e719edc6313651540e9d90f5600c2ed605fa6abf
- https://git.alpinelinux.org/aports/commit/?id=606dbad6dd155ec3aebfba4513206d9bdea93b52
- https://git.alpinelinux.org/aports/commit/?id=429e21cec4a19bb630e26ace13a7e81c4d8bc5dd
- https://git.alpinelinux.org/aports/commit/?id=bb51c7f4170f84a98bc3789732d7c06ab575323f
- https://git.alpinelinux.org/aports/commit/?id=cd39a7408c7e39b480eef2647ee7757bb1be4df5