Back to Database
Status published
Medium
CVE-2023-5981
Gnutls: timing side-channel in the rsa-psk authentication
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
THREAT MONITOR
Am I Vulnerable?
Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2023-5981
Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- This issue was discovered by Daiki Ueno (Red Hat).
References
- https://access.redhat.com/errata/RHSA-2024:0155
- https://access.redhat.com/errata/RHSA-2024:0319
- https://access.redhat.com/errata/RHSA-2024:0399
- https://access.redhat.com/errata/RHSA-2024:0451
- https://access.redhat.com/errata/RHSA-2024:0533
- https://access.redhat.com/errata/RHSA-2024:1383
- https://access.redhat.com/errata/RHSA-2024:2094
- https://access.redhat.com/security/cve/CVE-2023-5981
- https://bugzilla.redhat.com/show_bug.cgi?id=2248445
- https://gnutls.org/security-new.html#GNUTLS-SA-2023-10-23
More from Red Hat
View All →CVE-2025-9909
Aap-gateway: improper path validation in gateway allows credential exfiltration
Medium
6.7
CVE-2025-9908
Event-driven-ansible: sensitive internal headers disclosure in aap eda event streams
Medium
6.7
CVE-2025-9907
Event-driven-ansible: event stream test mode exposes sensitive headers in aap eda
Medium
6.7
CVE-2025-9901
Libsoup: improper handling of http vary header in libsoup caching
Medium
5.9
CVE-2025-9820
Gnutls: stack-based buffer overflow in gnutls_pkcs11_token_init() function
Medium
4
Affected Vendor
Red Hat
View all reports →Affected Software
Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.6 Extended Update Support, Red Hat Enterprise Linux 8.8 Extended Update Support, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 9.2 Extended Update Support, RHODF-4.15-RHEL-9, RHOL-5.8-RHEL-9, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7
Vulnerable Versions:
0:3.6.16-8.el8_9, 0:3.6.16-5.el8_6.2, 0:3.6.16-7.el8_8.1, 0:3.7.6-23.el9_3.3, 0:3.7.6-21.el9_2.1, v4.15.0-37, v4.15.0-68, v4.15.0-158, v4.15.0-39, v4.15.0-58, v4.15.0-13, v4.15.0-81, v4.15.0-79, v4.15.0-22, v4.15.0-57, v4.15.0-6, v4.15.0-15, v4.15.0-54, v4.15.0-10, v4.15.0-26, v4.15.0-19, v4.15.0-21, v4.15.0-103, v5.8.6-22, v5.8.6-11, v6.8.1-407, v5.8.6-19, v1.0.0-479, v5.8.6-7, v0.4.0-247, v5.8.6-5, v1.1.0-227, v5.8.1-470, v2.9.6-14, v5.8.6-2, v5.8.6-24, v5.8.6-10, v0.1.0-525, v0.1.0-224, v0.28.1-56
Timeline
Official Publish:
November 28th, 2023
Last Modified:
February 25th, 2026
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Weaknesses (CWE)
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.