An issue was discovered in Xen through 4.12.x allowing ARM guest OS users to cause a denial of service or gain privileges by leveraging the erroneous enabling of interrupts. Interrupts are unconditionally unmasked in exception handlers. When an exception occurs on an ARM system which is handled without changing processor level, some interrupts are unconditionally enabled during exception entry. So exceptions which occur when interrupts are masked will effectively unmask the interrupts. A malicious guest might contrive to arrange for critical Xen code to run with interrupts erroneously enabled. This could lead to data corruption, denial of service, or possibly even privilege escalation. However a precise attack technique has not been identified.
References
Configurations
Configuration 1 (hide)
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Configuration 2 (hide)
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History
21 Nov 2024, 04:33
Type | Values Removed | Values Added |
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References | () http://www.openwall.com/lists/oss-security/2019/10/31/5 - Mailing List, Patch, Third Party Advisory | |
References | () http://xenbits.xen.org/xsa/advisory-303.html - Patch, Vendor Advisory | |
References | () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2BQKX7M2RHCWDBKNPX4KEBI3MJIH6AYZ/ - | |
References | () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I5WWPW4BSZDDW7VHU427XTVXV7ROOFFW/ - | |
References | () https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IZYATWNUGHRBG6I3TC24YHP5Y3J7I6KH/ - | |
References | () https://seclists.org/bugtraq/2020/Jan/21 - Mailing List, Third Party Advisory | |
References | () https://www.debian.org/security/2020/dsa-4602 - Third Party Advisory |
07 Nov 2023, 03:06
Type | Values Removed | Values Added |
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Information
Published : 2019-10-31 14:15
Updated : 2024-11-21 04:33
NVD link : CVE-2019-18422
Mitre link : CVE-2019-18422
CVE.ORG link : CVE-2019-18422
JSON object : View
Products Affected
debian
- debian_linux
xen
- xen
fedoraproject
- fedora
CWE
CWE-732
Incorrect Permission Assignment for Critical Resource