Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 29.2%
CVSS Severity
CVSS v3 Score 6.5
CVSS v2 Score 2.1
References
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00011.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/34HBFTYNMQMWIO2GGK7DB6KV4M6R5YPV/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D5R73AYE53QA32KTMHUVKCX6E52CIS43/
- https://seclists.org/bugtraq/2020/Jan/21
- https://security.gentoo.org/glsa/202003-56
- https://www.debian.org/security/2020/dsa-4602
- https://xenbits.xen.org/xsa/advisory-307.html
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00011.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/34HBFTYNMQMWIO2GGK7DB6KV4M6R5YPV/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D5R73AYE53QA32KTMHUVKCX6E52CIS43/
- https://seclists.org/bugtraq/2020/Jan/21
- https://security.gentoo.org/glsa/202003-56
- https://www.debian.org/security/2020/dsa-4602
- https://xenbits.xen.org/xsa/advisory-307.html
Products affected by CVE-2019-19581
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cpe:2.3:o:fedoraproject:fedora:31
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cpe:2.3:o:xen:xen:4.10.0
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cpe:2.3:o:xen:xen:4.10.1
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cpe:2.3:o:xen:xen:4.10.2
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cpe:2.3:o:xen:xen:4.10.3
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cpe:2.3:o:xen:xen:4.10.4
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cpe:2.3:o:xen:xen:4.11.0
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cpe:2.3:o:xen:xen:4.11.1
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cpe:2.3:o:xen:xen:4.11.2
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cpe:2.3:o:xen:xen:4.11.3
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cpe:2.3:o:xen:xen:4.11.4
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cpe:2.3:o:xen:xen:4.12.0
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cpe:2.3:o:xen:xen:4.12.1
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cpe:2.3:o:xen:xen:4.8.0
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cpe:2.3:o:xen:xen:4.8.1
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cpe:2.3:o:xen:xen:4.8.2
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cpe:2.3:o:xen:xen:4.8.3
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cpe:2.3:o:xen:xen:4.8.4
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cpe:2.3:o:xen:xen:4.8.5
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cpe:2.3:o:xen:xen:4.9.0
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cpe:2.3:o:xen:xen:4.9.1
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cpe:2.3:o:xen:xen:4.9.2
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cpe:2.3:o:xen:xen:4.9.3
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cpe:2.3:o:xen:xen:4.9.4