Medium 4.7Published Jun 13, 2018

CVE-2018-0495Libgcrypt before 1.7.10 and 1.8.x before 1.8.3 allows a memory-cache side-channel attack on ECDSA signatures that can be mitigated through the use of blinding during the signing process in the _gcry_…

Updated under an hour ago (2026-10-19 08:40 UTC)

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It affects Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP and 10 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

Libgcrypt before 1.7.10 and 1.8.x before 1.8.3 allows a memory-cache side-channel attack on ECDSA signatures that can be mitigated through the use of blinding during the signing process in the _gcry_ecc_ecdsa_sign function in cipher/ecc-ecdsa.c, aka the Return Of the Hidden Number Problem or ROHNP. To discover an ECDSA key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.

CVSS: 4.7 MEDIUM (v3.0, NVD)CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: debian
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
gnupg libgcrypt gnupg:libgcrypt	before 1.7.10; from 1.8.0 before 1.8.3	NVD
canonical ubuntu_linux canonical:ubuntu_linux	12.04; 14.04; 16.04; 17.10; 18.04; 18.10	NVD
debian debian_linux debian:debian_linux	8.0; 9.0	NVD
redhat ansible_tower redhat:ansible_tower	3.3	NVD
redhat enterprise_linux_desktop redhat:enterprise_linux_desktop	7.0	NVD
redhat enterprise_linux_server redhat:enterprise_linux_server	7.0	NVD
redhat enterprise_linux_workstation redhat:enterprise_linux_workstation	7.0	NVD
oracle traffic_director oracle:traffic_director	11.1.1.9.0	NVD

References

https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=9010d1576e278a4274ad3f4aa15776c28f6ba965x-refsource-misc
http://www.securitytracker.com/id/1041144vdb-entry, x-refsource-sectrack, third-party-advisory
https://usn.ubuntu.com/3850-1/vendor-advisory, x-refsource-ubuntu, third-party-advisory
http://www.securitytracker.com/id/1041147vdb-entry, x-refsource-sectrack, third-party-advisory
https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/x-refsource-misc, exploit, third-party-advisory
https://usn.ubuntu.com/3689-1/vendor-advisory, x-refsource-ubuntu, third-party-advisory
https://lists.gnupg.org/pipermail/gnupg-announce/2018q2/000426.htmlx-refsource-misc, vendor-advisory
https://usn.ubuntu.com/3689-2/vendor-advisory, x-refsource-ubuntu, third-party-advisory
https://usn.ubuntu.com/3692-2/vendor-advisory, x-refsource-ubuntu, third-party-advisory
https://lists.debian.org/debian-lts-announce/2018/06/msg00013.htmlmailing-list, x-refsource-mlist, third-party-advisory
https://www.debian.org/security/2018/dsa-4231vendor-advisory, x-refsource-debian, third-party-advisory
https://access.redhat.com/errata/RHSA-2018:3505vendor-advisory, x-refsource-redhat, third-party-advisory
https://usn.ubuntu.com/3850-2/vendor-advisory, x-refsource-ubuntu, third-party-advisory
https://usn.ubuntu.com/3692-1/vendor-advisory, x-refsource-ubuntu, third-party-advisory
https://access.redhat.com/errata/RHSA-2018:3221vendor-advisory, x-refsource-redhat, third-party-advisory
https://dev.gnupg.org/T4011x-refsource-misc, patch, vendor-advisory
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.htmlx-refsource-misc, patch, third-party-advisory
https://access.redhat.com/errata/RHSA-2019:1297vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2019:1296vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2019:1543vendor-advisory, x-refsource-redhat
https://access.redhat.com/errata/RHSA-2019:2237vendor-advisory, x-refsource-redhat
https://cert-portal.siemens.com/productcert/html/ssa-398330.html

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.