Executive Summary
Informations | |||
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Name | CVE-2020-25601 | First vendor Publication | 2020-09-23 |
Vendor | Cve | Last vendor Modification | 2023-11-07 |
Security-Database Scoring CVSS v3
Cvss vector : CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | |||
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Overall CVSS Score | 5.5 | ||
Base Score | 5.5 | Environmental Score | 5.5 |
impact SubScore | 3.6 | Temporal Score | 5.5 |
Exploitabality Sub Score | 1.8 | ||
Attack Vector | Local | Attack Complexity | Low |
Privileges Required | Low | User Interaction | None |
Scope | Unchanged | Confidentiality Impact | None |
Integrity Impact | None | Availability Impact | High |
Calculate full CVSS 3.0 Vectors scores |
Security-Database Scoring CVSS v2
Cvss vector : (AV:L/AC:L/Au:N/C:N/I:N/A:C) | |||
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Cvss Base Score | 4.9 | Attack Range | Local |
Cvss Impact Score | 6.9 | Attack Complexity | Low |
Cvss Expoit Score | 3.9 | Authentication | None Required |
Calculate full CVSS 2.0 Vectors scores |
Detail
An issue was discovered in Xen through 4.14.x. There is a lack of preemption in evtchn_reset() / evtchn_destroy(). In particular, the FIFO event channel model allows guests to have a large number of event channels active at a time. Closing all of these (when resetting all event channels or when cleaning up after the guest) may take extended periods of time. So far, there was no arrangement for preemption at suitable intervals, allowing a CPU to spend an almost unbounded amount of time in the processing of these operations. Malicious or buggy guest kernels can mount a Denial of Service (DoS) attack affecting the entire system. All Xen versions are vulnerable in principle. Whether versions 4.3 and older are vulnerable depends on underlying hardware characteristics. |
Original Source
Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25601 |
CPE : Common Platform Enumeration
Sources (Detail)
Alert History
Date | Informations |
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2023-11-07 21:36:38 |
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2023-08-02 01:53:31 |
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2022-04-29 02:04:39 |
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2021-09-02 01:39:29 |
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2021-08-05 01:38:13 |
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2021-07-21 17:23:22 |
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2021-05-05 01:39:00 |
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2021-05-04 13:50:20 |
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2021-04-22 03:02:03 |
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2021-03-27 01:34:08 |
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2021-02-05 01:31:31 |
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2020-11-11 12:29:36 |
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2020-10-08 05:22:54 |
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2020-10-06 00:22:54 |
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2020-10-04 17:22:52 |
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2020-10-03 09:22:53 |
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2020-10-01 12:27:53 |
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2020-09-27 09:22:48 |
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2020-09-24 17:22:55 |
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2020-09-24 05:22:57 |
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