Improper input validation in Xen
CVE-2016-1570
The PV superpage functionality in arch/x86/mm.c in Xen 3.4.0, 3.4.1, and 4.1.x through 4.6.x allows local PV guests to obtain sensitive information, cause a denial of service, gain privileges, or have unspecified other impact via a crafted page identifier (MFN) to the (1) MMUEXT_MARK_SUPER or (2) MMUEXT_UNMARK_SUPER sub-op in the HYPERVISOR_mmuext_op hypercall or (3) unknown vectors related to page table updates.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.012 (63.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.5 (High). Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H.
Affected products
- Xen — versions 3.4.0, 3.4.1, 4.1.0
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (vendor-advisory, x_refsource_DEBIAN)
- cve@mitre.org (vdb-entry, x_refsource_SECTRACK)
- cve@mitre.org (x_refsource_CONFIRM, Vendor Advisory)
Frequently asked questions
- What is CVE-2016-1570?
- CVE-2016-1570 is a high-severity vulnerability in Xen, classified under Improper Input Validation. CVSS score: 8.5/10. Published 2016-01-22.
- How severe is CVE-2016-1570?
- High severity. CVSS v3 base score is 8.5 out of 10.