High 7.4Published Feb 14, 2023

CVE-2023-0361A timing side-channel in the handling of RSA ClientKeyExchange messages was discovered in GnuTLS.

Updated under an hour ago (Oct 27, 2026, 11:20 AM ET)

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It affects Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP and 9 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP

Exploited in the last 30 days

A timing side-channel in the handling of RSA ClientKeyExchange messages was discovered in GnuTLS. This side-channel can be sufficient to recover the key encrypted in the RSA ciphertext across a network in a Bleichenbacher style attack. To achieve a successful decryption the attacker would need to send a large amount of specially crafted messages to the vulnerable server. By recovering the secret from the ClientKeyExchange message, the attacker would be able to decrypt the application data exchanged over that connection.

CVSS: 7.4 HIGH (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-203
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: redhat
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 14, 2026

Affected products

Affected products

Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.0 before V3.1.5	CISA ADP
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name)	from V3.1.0 before V3.1.5	CISA ADP
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.0 before V3.1.5	CISA ADP
gnu gnutls gnu:gnutls	3.6.8-11.el8_2	NVD
redhat enterprise_linux redhat:enterprise_linux	8.0; 9.0	NVD
debian debian_linux debian:debian_linux	10.0	NVD
fedoraproject fedora fedoraproject:fedora	36; 37; 38	NVD
netapp active_iq_unified_manager netapp:active_iq_unified_manager	all versions	NVD
netapp converged_systems_advisor_agent netapp:converged_systems_advisor_agent	all versions	NVD
netapp ontap_select_deploy_administration_utility netapp:ontap_select_deploy_administration_utility	all versions	NVD

References

References

https://access.redhat.com/security/cve/CVE-2023-0361	third-party-advisory
https://github.com/tlsfuzzer/tlsfuzzer/pull/679	issue-tracking, patch
https://gitlab.com/gnutls/gnutls/-/issues/1050	exploit, issue-tracking, vendor-advisory
https://lists.debian.org/debian-lts-announce/2023/02/msg00015.html	mailing-list, third-party-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UFIA3X4IZ3CW7SRQ2UHNHNPMRIAWF2FI/	vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z634YBXAJ5VLDI62IOPBVP5K6YFHAWCY/	vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WS4KVDOG6QTALWHC2QE4Y7VPDRMLTRWQ/	vendor-advisory
https://security.netapp.com/advisory/ntap-20230324-0005/	third-party-advisory
https://security.netapp.com/advisory/ntap-20230725-0005/
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.