CVE-2020-29571
Description
An issue was discovered in Xen through 4.14.x. A bounds check common to most operation time functions specific to FIFO event channels depends on the CPU observing consistent state. While the producer side uses appropriately ordered writes, the consumer side isnt protected against re-ordered reads, and may hence end up de-referencing a NULL pointer. Malicious or buggy guest kernels can mount a Denial of Service (DoS) attack affecting the entire system. Only Arm systems may be vulnerable. Whether a system is vulnerable depends on the specific CPU. x86 systems are not vulnerable.
Risk Information
Base Score
6.2
MODERATE
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
Exploitation Probability
0.058
Associated Vulnerability
| Vulnerability | OS Platform |
|---|---|
| SUSE-SU-2020:3880-1(SUSE Linux Enterprise Server 12-SP5 ) xen-4.12.4_06-3.36.1.x86_64.rpm | Linux |
| SUSE-SU-2020:3880-1(SUSE Linux Enterprise Server 12-SP5 ) xen-debugsource-4.12.4_06-3.36.1.x86_64.rpm | Linux |
| SUSE-SU-2020:3880-1(SUSE Linux Enterprise Server 12-SP5 ) xen-doc-html-4.12.4_06-3.36.1.x86_64.rpm | Linux |
| SUSE-SU-2020:3880-1(SUSE Linux Enterprise Server 12-SP5 ) xen-libs-4.12.4_06-3.36.1.x86_64.rpm | Linux |
| SUSE-SU-2020:3880-1(SUSE Linux Enterprise Server 12-SP5 ) xen-libs-32bit-4.12.4_06-3.36.1.x86_64.rpm | Linux |
| SUSE-SU-2020:3880-1(SUSE Linux Enterprise Server 12-SP5 ) xen-libs-debuginfo-4.12.4_06-3.36.1.x86_64.rpm | Linux |
| SUSE-SU-2020:3880-1(SUSE Linux Enterprise Server 12-SP5 ) xen-libs-debuginfo-32bit-4.12.4_06-3.36.1.x86_64.rpm | Linux |
| SUSE-SU-2020:3880-1(SUSE Linux Enterprise Server 12-SP5 ) xen-tools-4.12.4_06-3.36.1.x86_64.rpm | Linux |
| SUSE-SU-2020:3880-1(SUSE Linux Enterprise Server 12-SP5 ) xen-tools-debuginfo-4.12.4_06-3.36.1.x86_64.rpm | Linux |
| SUSE-SU-2020:3880-1(SUSE Linux Enterprise Server 12-SP5 ) xen-tools-domU-4.12.4_06-3.36.1.x86_64.rpm | Linux |
| SUSE-SU-2020:3880-1(SUSE Linux Enterprise Server 12-SP5 ) xen-tools-domU-debuginfo-4.12.4_06-3.36.1.x86_64.rpm | Linux |
Patch Details
No records foundReferences
https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234