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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2023-0045 Detail

Description

The current implementation of the prctl syscall does not issue an IBPB immediately during the syscall. The ib_prctl_set  function updates the Thread Information Flags (TIFs) for the task and updates the SPEC_CTRL MSR on the function __speculation_ctrl_update, but the IBPB is only issued on the next schedule, when the TIF bits are checked. This leaves the victim vulnerable to values already injected on the BTB, prior to the prctl syscall.  The patch that added the support for the conditional mitigation via prctl (ib_prctl_set) dates back to the kernel 4.9.176. We recommend upgrading past commit a664ec9158eeddd75121d39c9a0758016097fa96


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://git.kernel.org/tip/a664ec9158eeddd75121d39c9a0758016097fa96 Mailing List  Patch 
https://github.com/google/security-research/security/advisories/GHSA-9x5g-vmxf-4qj8 Exploit  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2023/05/msg00005.html Mailing List  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2023/05/msg00006.html Mailing List  Third Party Advisory 
https://security.netapp.com/advisory/ntap-20230714-0001/ Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-610 Externally Controlled Reference to a Resource in Another Sphere cwe source acceptance level NIST   Google Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

9 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2023-0045
NVD Published Date:
04/25/2023
NVD Last Modified:
08/11/2023
Source:
Google Inc.