CVE-2023-6240

Kernel: marvin vulnerability side-channel leakage in the rsa decryption operation

Description

A Marvin vulnerability side-channel leakage was found in the RSA decryption operation in the Linux Kernel. This issue may allow a network attacker to decrypt ciphertexts or forge signatures, limiting the services that use that private key.

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.08%
Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com Vendor Advisory redhat.com
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 6
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat Enterprise Linux 9
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2024:1881 vendor advisory
https://access.redhat.com/errata/RHSA-2024:1882 vendor advisory
https://access.redhat.com/errata/RHSA-2024:2758 vendor advisory
https://access.redhat.com/errata/RHSA-2024:3414 vendor advisory
https://access.redhat.com/errata/RHSA-2024:3421 vendor advisory
https://access.redhat.com/errata/RHSA-2024:3618 vendor advisory
https://access.redhat.com/errata/RHSA-2024:3627 vendor advisory
https://access.redhat.com/security/cve/CVE-2023-6240 third party advisory vdb entry
https://bugzilla.redhat.com/show_bug.cgi?id=2250843 issue tracking
https://people.redhat.com/~hkario/marvin/ third party advisory
https://securitypitfalls.wordpress.com/2023/10/16/experiment-with-side-channel-attacks-yourself/ technical description
https://security.netapp.com/advisory/ntap-20240628-0002/

Frequently Asked Questions

What is the severity of CVE-2023-6240?
CVE-2023-6240 has been scored as a medium severity vulnerability.
How to fix CVE-2023-6240?
To fix CVE-2023-6240, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-6240 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-6240 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-6240?
CVE-2023-6240 affects Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support, Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support, Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support, Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support, Red Hat Red Hat Enterprise Linux 6, Red Hat Red Hat Enterprise Linux 7, Red Hat Red Hat Enterprise Linux 7, Red Hat Red Hat Enterprise Linux 9.
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