Vulnerability in Xen
CVE-2020-27670
An issue was discovered in Xen through 4.14.x allowing x86 guest OS users to cause a denial of service (data corruption), cause a data leak, or possibly gain privileges because an AMD IOMMU page-table entry can be half-updated.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (15.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 15.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Xen
- Debian Linux — versions 10.0
- Fedoraproject Fedora — versions 31
- openSUSE Leap — versions 15.1, 15.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- xenbits.xen.org/xsa/advisory-347.html (Patch, Vendor Advisory)
- xenbits.xen.org/xsa/advisory-347.html (Patch, Vendor Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-10/msg00075.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.opensuse.org/opensuse-security-announce/2020-11/msg00025.html (vendor-advisory, Mailing List, Third Party Advisory)
- security.gentoo.org/glsa/202011-06 (vendor-advisory, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- www.debian.org/security/2020/dsa-4804 (vendor-advisory, Third Party Advisory)
- www.openwall.com/lists/oss-security/2021/01/19/9 (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-27670?
- CVE-2020-27670 is a high-severity vulnerability in Xen, classified under Insufficient Verification of Data Authenticity. CVSS score: 7.8/10. Published 2020-10-22.
- How severe is CVE-2020-27670?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2020-27670 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.