#VU65844 Resource management error in Xen - CVE-2022-33744
Vulnerability identifier: #VU65844
Vulnerability risk: Low
CVSSv4.0: 5.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U/U:Clear]
CVE-ID:
CWE-ID:
CWE-399
Exploitation vector: Local
Exploit availability: No
Vulnerable software:
Xen
Server applications /
Virtualization software
Vendor: Xen Project
Description
The vulnerability allows an attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of foreign mappings performed by rbtree when mapping pages of Arm guests. An unprivileged Arm guest can cause inconsistencies of the rbtree via PV devices, which can lead to denial of service of dom0 and cause crashes or the inability to perform further mappings of other guests' memory pages.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Xen: All versions
External links
https://xenbits.xenproject.org/xsa/advisory-406.txt
https://xenbits.xen.org/xsa/advisory-406.html
https://www.openwall.com/lists/oss-security/2022/07/05/4
https://www.debian.org/security/2022/dsa-5191
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.
