Vulnerability · Published Nov 24, 2020 · Assigned by mitre
CVE-2020-29040
High 8.8
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 0.4% (higher than 32% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)8.8High
Exploit odds (30 days)0.4%top 68.1% 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 guest OS users to cause a denial of service (stack corruption), cause a data leak, or possibly gain privileges because of an off-by-one error. NOTE: this issue is caused by an incorrect fix for CVE-2020-27671.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | xen | 4.14.0-r3 | ALPINE-CVE-2020-29040 |
| Alpine:v3.21 | xen | 4.14.0-r3 | ALPINE-CVE-2020-29040 |
| Alpine:v3.22 | xen | 4.14.0-r3 | ALPINE-CVE-2020-29040 |
| Alpine:v3.23 | xen | 4.14.0-r3 | ALPINE-CVE-2020-29040 |
| Alpine:v3.24 | xen | 4.14.0-r3 | ALPINE-CVE-2020-29040 |
| Debian:12 | xen | 4.14.0+88-g1d1d1f5391-1 | DEBIAN-CVE-2020-29040 |
| Debian:13 | xen | 4.14.0+88-g1d1d1f5391-1 | DEBIAN-CVE-2020-29040 |
| Debian:14 | xen | 4.14.0+88-g1d1d1f5391-1 | DEBIAN-CVE-2020-29040 |
Affected products (as reported)
References
- http://xenbits.xen.org/xsa/advisory-355.html x_refsource_CONFIRM
- https://xenbits.xen.org/xsa/advisory-355.html x_refsource_MISC
- [oss-security] 20210119 Xen Security Advisory 355 v3 (CVE-2020-29040) - stack corruption from XSA-346 change mailing-list, x_refsource_MLIST