CVE-2023-5981

Gnutls: timing side-channel in the rsa-psk authentication

Description

A vulnerability was found that the response times to malformed ciphertexts in RSA-PSK ClientKeyExchange differ from response times of ciphertexts with correct PKCS#1 v1.5 padding.

Remediation

Workaround:

  • To address the issue found upgrade to GnuTLS 3.8.2 or later versions.

Category

5.9
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.52%
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 Vendor Advisory redhat.com Vendor Advisory gnutls.org
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9
Affected: Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHODF-4.15-RHEL-9
Affected: Red Hat RHOL-5.8-RHEL-9
Affected: Red Hat RHOL-5.8-RHEL-9
Affected: Red Hat RHOL-5.8-RHEL-9
Affected: Red Hat RHOL-5.8-RHEL-9
Affected: Red Hat RHOL-5.8-RHEL-9
Affected: Red Hat RHOL-5.8-RHEL-9
Affected: Red Hat RHOL-5.8-RHEL-9
Affected: Red Hat RHOL-5.8-RHEL-9
Affected: Red Hat RHOL-5.8-RHEL-9
Affected: Red Hat RHOL-5.8-RHEL-9
Affected: Red Hat RHOL-5.8-RHEL-9
Affected: Red Hat RHOL-5.8-RHEL-9
Affected: Red Hat RHOL-5.8-RHEL-9
Affected: Red Hat RHOL-5.8-RHEL-9
Affected: Red Hat RHOL-5.8-RHEL-9
Affected: Red Hat RHOL-5.8-RHEL-9
Affected: Red Hat RHOL-5.8-RHEL-9
Affected: Red Hat Red Hat Enterprise Linux 6
Affected: Red Hat Red Hat Enterprise Linux 7
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/errata/RHSA-2024:0155 vendor advisory
https://access.redhat.com/errata/RHSA-2024:0319 vendor advisory
https://access.redhat.com/errata/RHSA-2024:0399 vendor advisory
https://access.redhat.com/errata/RHSA-2024:0451 vendor advisory
https://access.redhat.com/errata/RHSA-2024:0533 vendor advisory
https://access.redhat.com/errata/RHSA-2024:1383 vendor advisory
https://access.redhat.com/errata/RHSA-2024:2094 vendor advisory
https://access.redhat.com/security/cve/CVE-2023-5981 vdb entry vendor advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2248445 third party advisory issue tracking
https://gnutls.org/security-new.html#GNUTLS-SA-2023-10-23 vendor advisory issue tracking
http://www.openwall.com/lists/oss-security/2024/01/19/3
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7ZEIOLORQ7N6WRPFXZSYDL2MC4LP7VFV/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GNXKVR5YNUEBNHAHM5GSYKBZX4W2HMN2/

Frequently Asked Questions

What is the severity of CVE-2023-5981?
CVE-2023-5981 has been scored as a medium severity vulnerability.
How to fix CVE-2023-5981?
As a workaround for remediating CVE-2023-5981: To address the issue found upgrade to GnuTLS 3.8.2 or later versions.
Is CVE-2023-5981 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-5981 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-5981?
CVE-2023-5981 affects Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support, Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9, Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support, Red Hat RHODF-4.15-RHEL-9, Red Hat RHODF-4.15-RHEL-9, Red Hat RHODF-4.15-RHEL-9, Red Hat RHODF-4.15-RHEL-9, Red Hat RHODF-4.15-RHEL-9, Red Hat RHODF-4.15-RHEL-9, Red Hat RHODF-4.15-RHEL-9, Red Hat RHODF-4.15-RHEL-9, Red Hat RHODF-4.15-RHEL-9, Red Hat RHODF-4.15-RHEL-9, Red Hat RHODF-4.15-RHEL-9, Red Hat RHODF-4.15-RHEL-9, Red Hat RHODF-4.15-RHEL-9, Red Hat RHODF-4.15-RHEL-9, Red Hat RHODF-4.15-RHEL-9, Red Hat RHODF-4.15-RHEL-9, Red Hat RHODF-4.15-RHEL-9, Red Hat RHODF-4.15-RHEL-9, Red Hat RHODF-4.15-RHEL-9, Red Hat RHODF-4.15-RHEL-9, Red Hat RHODF-4.15-RHEL-9, Red Hat RHODF-4.15-RHEL-9, Red Hat RHODF-4.15-RHEL-9, Red Hat RHODF-4.15-RHEL-9, Red Hat RHODF-4.15-RHEL-9, Red Hat RHODF-4.15-RHEL-9, Red Hat RHOL-5.8-RHEL-9, Red Hat RHOL-5.8-RHEL-9, Red Hat RHOL-5.8-RHEL-9, Red Hat RHOL-5.8-RHEL-9, Red Hat RHOL-5.8-RHEL-9, Red Hat RHOL-5.8-RHEL-9, Red Hat RHOL-5.8-RHEL-9, Red Hat RHOL-5.8-RHEL-9, Red Hat RHOL-5.8-RHEL-9, Red Hat RHOL-5.8-RHEL-9, Red Hat RHOL-5.8-RHEL-9, Red Hat RHOL-5.8-RHEL-9, Red Hat RHOL-5.8-RHEL-9, Red Hat RHOL-5.8-RHEL-9, Red Hat RHOL-5.8-RHEL-9, Red Hat RHOL-5.8-RHEL-9, Red Hat RHOL-5.8-RHEL-9, Red Hat Red Hat Enterprise Linux 6, Red Hat Red Hat Enterprise Linux 7.
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