Untrusted Pointer Dereference in Xen - CVE-2020-15563
Published: July 9, 2020 / Updated: July 15, 2020
Vulnerability identifier: #VU29601
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:P/U:Green
CVE-ID: CVE-2020-15563
CWE-ID: CWE-822
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: Xen Project
Affected software:
Xen
Xen
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to inverted code paths in x86 dirty VRAM tracking in Xen. An attacker with access to HVM guest operating system can crash the hypervisor.
Note: the vulnerability affects x86 systems only.
How to mitigate CVE-2020-15563
Install updates from vendor's website.