Improper handling of exceptional conditions in Xen

1) Improper handling of exceptional conditions

EUVDB-ID: #VU79450

Risk: Low

CVSSv3.1: 4.9 [CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-33748

CWE-ID: CWE-755 - Improper Handling of Exceptional Conditions

Exploit availability: No

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

External links

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

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.