Vulnerability Description
An issue was discovered in Xen through 4.14.x. Recording of the per-vCPU control block mapping maintained by Xen and that of pointers into the control block is reversed. The consumer assumes, seeing the former initialized, that the latter are also ready for use. Malicious or buggy guest kernels can mount a Denial of Service (DoS) attack affecting the entire system.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Xen | Xen | >= 4.4.0, <= 4.14.0 |
| Debian | Debian Linux | 10.0 |
| Fedoraproject | Fedora | 32 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2020/12/16/4Mailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202107-30Third Party Advisory
- https://www.debian.org/security/2020/dsa-4812Third Party Advisory
- https://xenbits.xenproject.org/xsa/advisory-358.htmlPatchVendor Advisory
- http://www.openwall.com/lists/oss-security/2020/12/16/4Mailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202107-30Third Party Advisory
- https://www.debian.org/security/2020/dsa-4812Third Party Advisory
- https://xenbits.xenproject.org/xsa/advisory-358.htmlPatchVendor Advisory
FAQ
What is CVE-2020-29570?
CVE-2020-29570 is a vulnerability with a CVSS score of 6.2 (MEDIUM). An issue was discovered in Xen through 4.14.x. Recording of the per-vCPU control block mapping maintained by Xen and that of pointers into the control block is reversed. The consumer assumes, seeing t...
How severe is CVE-2020-29570?
CVE-2020-29570 has been rated MEDIUM with a CVSS base score of 6.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-29570?
Check the references section above for vendor advisories and patch information. Affected products include: Xen Xen, Debian Debian Linux, Fedoraproject Fedora.