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.
Fix
Patch, vendor advisory and mitigation references on NVD 6
- https://dev.gnupg.org/T4011 Patch, Vendor Advisory
- https://lists.gnupg.org/pipermail/gnupg-announce/2018q2/000426.html Vendor Advisory
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html Patch, Third Party Advisory
- https://dev.gnupg.org/T4011 Patch, Vendor Advisory
- https://lists.gnupg.org/pipermail/gnupg-announce/2018q2/000426.html Vendor Advisory
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html Patch, Third Party Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 4.7 · gnupg, canonical, debianNVD modified 2026-10-14 07:16
Affected (CPE criteria) 14
cpe:2.3:a:gnupg:libgcrypt:*:*:*:*:*:*:*:*cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*cpe:2.3:a:redhat:ansible_tower:3.3:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*cpe:2.3:a:oracle:traffic_director:11.1.1.9.0:*:*:*:*:*:*:*
References 43
- http://www.securitytracker.com/id/1041144 Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041147 Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:3221 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3505 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1296
- https://access.redhat.com/errata/RHSA-2019:1297
- https://access.redhat.com/errata/RHSA-2019:1543
- https://access.redhat.com/errata/RHSA-2019:2237
- https://dev.gnupg.org/T4011 Patch, Vendor Advisory
- https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=9010d1576e278a4274ad3f4aa15776c28f6ba965
- https://lists.debian.org/debian-lts-announce/2018/06/msg00013.html Mailing List, Third Party Advisory
- https://lists.gnupg.org/pipermail/gnupg-announce/2018q2/000426.html Vendor Advisory
- https://usn.ubuntu.com/3689-1/ Third Party Advisory
- https://usn.ubuntu.com/3689-2/ Third Party Advisory
- https://usn.ubuntu.com/3692-1/ Third Party Advisory
- https://usn.ubuntu.com/3692-2/ Third Party Advisory
- https://usn.ubuntu.com/3850-1/ Third Party Advisory
- https://usn.ubuntu.com/3850-2/ Third Party Advisory
- https://www.debian.org/security/2018/dsa-4231 Third Party Advisory
- https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/ Exploit, Third Party Advisory
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html Patch, Third Party Advisory
- http://www.securitytracker.com/id/1041144 Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1041147 Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:3221 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3505 Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1296
- https://access.redhat.com/errata/RHSA-2019:1297
- https://access.redhat.com/errata/RHSA-2019:1543
- https://access.redhat.com/errata/RHSA-2019:2237
- https://dev.gnupg.org/T4011 Patch, Vendor Advisory
- https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=9010d1576e278a4274ad3f4aa15776c28f6ba965
- https://lists.debian.org/debian-lts-announce/2018/06/msg00013.html Mailing List, Third Party Advisory
- https://lists.gnupg.org/pipermail/gnupg-announce/2018q2/000426.html Vendor Advisory
- https://usn.ubuntu.com/3689-1/ Third Party Advisory
- https://usn.ubuntu.com/3689-2/ Third Party Advisory
- https://usn.ubuntu.com/3692-1/ Third Party Advisory
- https://usn.ubuntu.com/3692-2/ Third Party Advisory
- https://usn.ubuntu.com/3850-1/ Third Party Advisory
- https://usn.ubuntu.com/3850-2/ Third Party Advisory
- https://www.debian.org/security/2018/dsa-4231 Third Party Advisory
- https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/ Exploit, Third Party Advisory
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html Patch, Third Party Advisory
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html