#VU65841 Resource management error in Xen - CVE-2022-33743

Vulnerability identifier: #VU65841

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-33743

CWE-ID: CWE-399

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Xen
Server applications / Virtualization software

Vendor: Xen Project

Description

The vulnerability allows a malicious network backend to perform a denial of service (DoS) attack.

The vulnerability exists due to an error in eXpress Data Path support implementation in Xen, allowing Linux netfront to use freed SKBs. A malicious network backend can cause denial of service on the guest OS.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Xen: All versions

---

External links
http://xenbits.xenproject.org/xsa/advisory-405.txt
http://xenbits.xen.org/xsa/advisory-405.html
http://www.openwall.com/lists/oss-security/2022/07/05/5
http://www.debian.org/security/2022/dsa-5191

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.