SB2017080798 - Denial of service in xen (Alpine package)
Published: August 7, 2017
Security Bulletin ID
SB2017080798
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Denial of service (CVE-ID: CVE-2017-10923)
CWE-ID: CWE-284 - Improper Access Control
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local attacker to cause DoS condition on the host system.
The weakness exists due to array access error. A local user on the guest system can send specially crafted software generated interrupts to vCPUS that use the MMIO register GICD_SGIR (GICv2) or System Register ICC_SGI1R (GICv3) and cause the hypervisor to crash.
Successful exploitation of the vulnerability results in denial of service.
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=605bcdc44def7408f05991fd6ecf6f7dfe7e683c
- https://git.alpinelinux.org/aports/commit/?id=2e37a309d6db43d6ec74cb76058f38a9060be22a