Vulnerability · Published Oct 22, 2020 · Assigned by mitre
CVE-2020-27671
High 7.8
In plain English
A high-severity security flaw in the xen package (Alpine). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.8High
Exploit odds (30 days)0.3%top 72.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
An issue was discovered in Xen through 4.14.x allowing x86 HVM and PVH guest OS users to cause a denial of service (data corruption), cause a data leak, or possibly gain privileges because coalescing of per-page IOMMU TLB flushes is mishandled.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | xen | 4.14.0-r2 | ALPINE-CVE-2020-27671 |
| Alpine:v3.21 | xen | 4.14.0-r2 | ALPINE-CVE-2020-27671 |
| Alpine:v3.22 | xen | 4.14.0-r2 | ALPINE-CVE-2020-27671 |
| Alpine:v3.23 | xen | 4.14.0-r2 | ALPINE-CVE-2020-27671 |
| Alpine:v3.24 | xen | 4.14.0-r2 | ALPINE-CVE-2020-27671 |
| Debian:12 | xen | 4.14.0+80-gd101b417b7-1 | DEBIAN-CVE-2020-27671 |
| Debian:13 | xen | 4.14.0+80-gd101b417b7-1 | DEBIAN-CVE-2020-27671 |
| Debian:14 | xen | 4.14.0+80-gd101b417b7-1 | DEBIAN-CVE-2020-27671 |
Affected products (as reported)
References
- http://xenbits.xen.org/xsa/advisory-346.html x_refsource_CONFIRM
- https://xenbits.xen.org/xsa/advisory-346.html x_refsource_MISC
- openSUSE-SU-2020:1783 vendor-advisory, x_refsource_SUSE
- openSUSE-SU-2020:1844 vendor-advisory, x_refsource_SUSE
- GLSA-202011-06 vendor-advisory, x_refsource_GENTOO
- FEDORA-2020-6dd36a716c vendor-advisory, x_refsource_FEDORA
- DSA-4804 vendor-advisory, x_refsource_DEBIAN
- [oss-security] 20210119 Xen Security Advisory 346 v3 (CVE-2020-27671) - undue deferral of IOMMU TLB flushes mailing-list, x_refsource_MLIST