Executive Summary
Informations | |||
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Name | CVE-2023-1998 | First vendor Publication | 2023-04-21 |
Vendor | Cve | Last vendor Modification | 2023-05-03 |
Security-Database Scoring CVSS v3
Cvss vector : CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N | |||
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Overall CVSS Score | 5.6 | ||
Base Score | 5.6 | Environmental Score | 5.6 |
impact SubScore | 4 | Temporal Score | 5.6 |
Exploitabality Sub Score | 1.1 | ||
Attack Vector | Local | Attack Complexity | High |
Privileges Required | Low | User Interaction | None |
Scope | Changed | Confidentiality Impact | High |
Integrity Impact | None | Availability Impact | None |
Calculate full CVSS 3.0 Vectors scores |
Security-Database Scoring CVSS v2
Cvss vector : | |||
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Cvss Base Score | N/A | Attack Range | N/A |
Cvss Impact Score | N/A | Attack Complexity | N/A |
Cvss Expoit Score | N/A | Authentication | N/A |
Calculate full CVSS 2.0 Vectors scores |
Detail
The Linux kernel allows userspace processes to enable mitigations by calling prctl with PR_SET_SPECULATION_CTRL which disables the speculation feature as well as by using seccomp. We had noticed that on VMs of at least one major cloud provider, the kernel still left the victim process exposed to attacks in some cases even after enabling the spectre-BTI mitigation with prctl. The same behavior can be observed on a bare-metal machine when forcing the mitigation to IBRS on boot command line. This happened because when plain IBRS was enabled (not enhanced IBRS), the kernel had some logic that determined that STIBP was not needed. The IBRS bit implicitly protects against cross-thread branch target injection. However, with legacy IBRS, the IBRS bit was cleared on returning to userspace, due to performance reasons, which disabled the implicit STIBP and left userspace threads vulnerable to cross-thread branch target injection against which STIBP protects. |
Original Source
Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1998 |
CWE : Common Weakness Enumeration
% | Id | Name |
---|---|---|
100 % | CWE-203 | Information Exposure Through Discrepancy |
CPE : Common Platform Enumeration
Sources (Detail)
Alert History
Date | Informations |
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2023-09-05 13:37:46 |
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2023-09-05 01:28:17 |
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2023-09-02 13:35:31 |
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2023-09-02 01:28:44 |
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2023-08-12 13:41:34 |
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2023-08-12 01:28:00 |
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2023-08-11 13:32:33 |
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2023-08-11 01:28:51 |
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2023-08-06 13:29:59 |
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2023-08-06 01:27:40 |
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2023-08-04 13:30:30 |
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2023-08-04 01:28:02 |
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2023-08-02 13:19:49 |
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2023-07-14 13:30:22 |
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2023-07-14 01:27:42 |
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2023-06-06 13:19:28 |
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2023-05-17 13:12:27 |
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2023-05-04 02:19:18 |
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2023-05-04 02:17:58 |
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2023-05-03 21:27:19 |
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2023-05-03 09:27:17 |
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2023-04-24 17:27:18 |
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2023-04-21 21:27:18 |
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