SB20180404117 - Security restrictions bypass in xen (Alpine package)
Published: April 4, 2018
Security Bulletin ID
SB20180404117
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Adjecent network
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Security restrictions bypass (CVE-ID: CVE-2018-12892)
CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls
CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:H/E:U/U:Clear
The vulnerability allows an adjacent attacker with administrative privileges to bypass security restrictions on the target system.
The vulnerability exists on x86 systems due to a flaw in libxl. An adjacent attacker can bypass the read-only restrictions on a SCSI disk image in certain cases.
Remediation
Install update from vendor's website.
References
- https://git.alpinelinux.org/aports/commit/?id=ca1b59327d93bdc40e475877934ab83be23847f1
- 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=afa60b4355e66c59078ac08cf7997c5f9c4d9f48