#VU64448 Buffer overflow in Xen - CVE-2022-26363

Vulnerability identifier: #VU64448

Vulnerability risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2022-26363

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Xen
Server applications / Virtualization software

Vendor: Xen Project

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to insufficient care with non-coherent mappings. A remote attacker can pass a specially crafted data and trigger memory corruption and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Xen: 4.13.0 - 4.16.1

---

External links
https://xenbits.xenproject.org/xsa/advisory-402.txt
https://www.openwall.com/lists/oss-security/2022/06/09/4
https://xenbits.xen.org/xsa/advisory-402.html

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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