Vulnerability Description
Xenstore: Cooperating guests can create arbitrary numbers of nodes T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Since the fix of XSA-322 any Xenstore node owned by a removed domain will be modified to be owned by Dom0. This will allow two malicious guests working together to create an arbitrary number of Xenstore nodes. This is possible by domain A letting domain B write into domain A's local Xenstore tree. Domain B can then create many nodes and reboot. The nodes created by domain B will now be owned by Dom0. By repeating this process over and over again an arbitrary number of nodes can be created, as Dom0's number of nodes isn't limited by Xenstore quota.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Xen | Xen | - |
| Debian | Debian Linux | 11.0 |
| Fedoraproject | Fedora | 35 |
Related Weaknesses (CWE)
References
- http://www.openwall.com/lists/oss-security/2022/11/01/9Mailing ListPatchThird Party Advisory
- http://xenbits.xen.org/xsa/advisory-419.htmlPatchVendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- 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/202402-07
- https://www.debian.org/security/2022/dsa-5272Third Party Advisory
- https://xenbits.xenproject.org/xsa/advisory-419.txtPatchVendor Advisory
- http://www.openwall.com/lists/oss-security/2022/11/01/9Mailing ListPatchThird Party Advisory
- http://xenbits.xen.org/xsa/advisory-419.htmlPatchVendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- 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/202402-07
- https://www.debian.org/security/2022/dsa-5272Third Party Advisory
FAQ
What is CVE-2022-42323?
CVE-2022-42323 is a vulnerability with a CVSS score of 5.5 (MEDIUM). Xenstore: Cooperating guests can create arbitrary numbers of nodes T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Sinc...
How severe is CVE-2022-42323?
CVE-2022-42323 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-42323?
Check the references section above for vendor advisories and patch information. Affected products include: Xen Xen, Debian Debian Linux, Fedoraproject Fedora.