#VU79450 Improper handling of exceptional conditions in Xen - CVE-2022-33748

Vulnerability identifier: #VU79450

Vulnerability risk: Low

CVSSv4.0: 3.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U/U:Clear]

CVE-ID: CVE-2022-33748

CWE-ID: CWE-755

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Xen
Server applications / Virtualization software

Vendor: Xen Project

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to lock order inversion in transitive grant copy handling As part of XSA-226 a missing cleanup call was inserted on an error handling path. A local user can send specially crafted input and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Xen: All versions

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External links
https://xenbits.xenproject.org/xsa/advisory-411.txt
https://xenbits.xen.org/xsa/advisory-411.html
https://www.openwall.com/lists/oss-security/2022/10/11/2
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XWSC77GS5NATI3TT7FMVPULUPXR635XQ/
https://www.debian.org/security/2022/dsa-5272
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TJOMUNGW6VTK5CZZRLWLVVEOUPEQBRHI/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YZVXG7OOOXCX6VIPEMLFDPIPUTFAYWPE/

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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