Vulnerability · Published Oct 22, 2020 · Assigned by mitre
CVE-2020-27672
High 7.0
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 18% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)7.0High
Exploit odds (30 days)0.3%top 81.7% 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 guest OS users to cause a host OS denial of service, achieve data corruption, or possibly gain privileges by exploiting a race condition that leads to a use-after-free involving 2MiB and 1GiB superpages.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | xen | 4.14.0-r2 | ALPINE-CVE-2020-27672 |
| Alpine:v3.21 | xen | 4.14.0-r2 | ALPINE-CVE-2020-27672 |
| Alpine:v3.22 | xen | 4.14.0-r2 | ALPINE-CVE-2020-27672 |
| Alpine:v3.23 | xen | 4.14.0-r2 | ALPINE-CVE-2020-27672 |
| Alpine:v3.24 | xen | 4.14.0-r2 | ALPINE-CVE-2020-27672 |
| Debian:12 | xen | 4.14.0+80-gd101b417b7-1 | DEBIAN-CVE-2020-27672 |
| Debian:13 | xen | 4.14.0+80-gd101b417b7-1 | DEBIAN-CVE-2020-27672 |
| Debian:14 | xen | 4.14.0+80-gd101b417b7-1 | DEBIAN-CVE-2020-27672 |
Affected products (as reported)
References
- http://xenbits.xen.org/xsa/advisory-345.html x_refsource_CONFIRM
- https://xenbits.xen.org/xsa/advisory-345.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 345 v4 (CVE-2020-27672) - x86: Race condition in Xen mapping code mailing-list, x_refsource_MLIST