CVE-2019-19581

An issue was discovered in Xen through 4.12.x allowing 32-bit Arm guest OS users to cause a denial of service (out-of-bounds access) because certain bit iteration is mishandled. In a number of places bitmaps are being used by the hypervisor to track certain state. Iteration over all bits involves functions which may misbehave in certain corner cases: On 32-bit Arm accesses to bitmaps with bit a count which is a multiple of 32, an out of bounds access may occur. A malicious guest may cause a hypervisor crash or hang, resulting in a Denial of Service (DoS). All versions of Xen are vulnerable. 32-bit Arm systems are vulnerable. 64-bit Arm systems are not vulnerable.

Link	Resource
https://xenbits.xen.org/xsa/advisory-307.html	Patch Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/D5R73AYE53QA32KTMHUVKCX6E52CIS43/	Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/34HBFTYNMQMWIO2GGK7DB6KV4M6R5YPV/
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00011.html
https://www.debian.org/security/2020/dsa-4602
https://seclists.org/bugtraq/2020/Jan/21
https://security.gentoo.org/glsa/202003-56

Configuration 1

cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:* cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*

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Published : 2019-12-11 06:16

Updated : 2020-01-03 10:15

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NVD link : CVE-2019-19581

Mitre link : CVE-2019-19581

No products.

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer