SB20180404119 - Side-channel attack in xen (Alpine package)
Published: April 4, 2018
Security Bulletin ID
SB20180404119
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 security vulnerability.
1) Side-channel attack (CVE-ID: CVE-2018-3665)
The vulnerability allows a local attacker to obtain potentially sensitive information.
The vulnerability exists due to utilizing the Lazy FP state restore technique for floating point state when context switching between application processes. A local attacker can conduct cache side-channel attacks and determine register values of other processes.
Note: This vulnerability is known as LazyFP.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=74dce6e0451466b8eb5078660886cc226f9704f4
- https://git.alpinelinux.org/aports/commit/?id=66ff4f8a6b71dd204bc568c21c45941d612402c2
- https://git.alpinelinux.org/aports/commit/?id=bafb572dda2d0814641af68fa0cceff256bc3705
- https://git.alpinelinux.org/aports/commit/?id=519be0a2d18ff557306f965c717c58763d8e711a
- https://git.alpinelinux.org/aports/commit/?id=afa60b4355e66c59078ac08cf7997c5f9c4d9f48