Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | Libgcrypt before 1.7.10 and 1.8.x before 1.8.3 | Libgcrypt before 1.7.10 and 1.8.x before 1.8.3 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libgcrypt20 | 1.8.3-1 | — |
| Debian 13 | libgcrypt20 | 1.8.3-1 | — |
| Debian 12 | libgcrypt20 | 1.8.3-1 | — |
| Debian 9 | libgcrypt20 | 1.7.6-2+deb9u3 | DSA-4231-1 |
| Debian 8 | libgcrypt20 | 1.6.3-2+deb8u5 | DLA-1405-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | libgcrypt20 | 1.8.1-4ubuntu1.1 | USN-3689-1 |
| Ubuntu 18.04 LTS | nss | 2:3.35-2ubuntu2.1 | USN-3850-1 |
| Ubuntu 18.04 LTS | openssl | 1.1.0g-2ubuntu4.1 | USN-3692-1 |
| Ubuntu 18.04 LTS | openssl1.0 | 1.0.2n-1ubuntu5.1 | USN-3692-1 |
| Ubuntu 16.04 LTS | libgcrypt20 | 1.6.5-2ubuntu0.5 | USN-3689-1 |
| Ubuntu 16.04 LTS | nss | 2:3.28.4-0ubuntu0.16.04.4 | USN-3850-1 |
| Ubuntu 16.04 LTS | openssl | 1.0.2g-1ubuntu4.13 | USN-3692-1 |
| Ubuntu 14.04 LTS | libgcrypt11 | 1.5.3-2ubuntu4.6 | USN-3689-1 |
| Ubuntu 14.04 LTS | nss | 2:3.28.4-0ubuntu0.14.04.4 | USN-3850-1 |
| Ubuntu 14.04 LTS | openssl | 1.0.1f-1ubuntu2.26 | USN-3692-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | nspr +1 | 4.21.0-1.el7 | RHSA-2019:2237 |
| RHEL 7 | nss +4 | 3.44.0-4.el7 | RHSA-2019:2237 |
| RHEL 7 | nss-softokn +3 | 3.44.0-5.el7 | RHSA-2019:2237 |
| RHEL 7 | nss-util +1 | 3.44.0-3.el7 | RHSA-2019:2237 |
| RHEL 7 | openssl +4 | 1:1.0.2k-16.el7 | RHSA-2018:3221 |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7.6 EUS | nss-softokn +3 | 3.36.0-6.el7_6 | RHSA-2020:1461 |
| RHEL 7.5 EUS | nss-softokn +3 | 3.36.0-6.el7_5 | RHSA-2020:1267 |
| RHEL 7.4 TUS | nss-softokn +3 | 3.28.3-9.el7_4 | RHSA-2020:1345 |
| RHEL 7.4 E4S | nss-softokn +3 | 3.28.3-9.el7_4 | RHSA-2020:1345 |
| RHEL 7.4 AUS | nss-softokn +3 | 3.28.3-9.el7_4 | RHSA-2020:1345 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-httpd +6 | 2.4.29-40.jbcs.el6 | RHSA-2019:1297 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-mod_ssl +1 | 1:2.4.29-40.jbcs.el6 | RHSA-2019:1297 |
| Red Hat JBoss Core Services 1 | jbcs-httpd24-openssl +4 | 1:1.0.2n-15.jbcs.el6 | RHSA-2019:1297 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | MozillaFirefox | 60.4.0-3.21.1 | SUSE-SU-2018:4235-1 |
| SLES 15 | libgcrypt | 1.8.2-6.3.1 | SUSE-SU-2018:1993-1 |
| SLES 15 | mozilla-nspr | 4.20-3.3.2 | SUSE-SU-2018:4235-1 |
| SLES 15 | mozilla-nss | 3.40.1-3.7.2 | SUSE-SU-2018:4235-1 |
| SLES 12 SP4 | MozillaFirefox | 60.4.0esr-109.55.1 | SUSE-SU-2018:4236-1 |
| SLES 12 SP4 | libgcrypt | 1.6.1-16.62.1 | SUSE-SU-2018:2452-2 |
| SLES 12 SP4 | mozilla-nspr | 4.20-19.6.1 | SUSE-SU-2018:4236-1 |
| SLES 12 SP4 | mozilla-nss | 3.40.1-58.18.1 | SUSE-SU-2018:4236-1 |
| SLES 12 SP3 | MozillaFirefox | 60.4.0esr-109.55.1 | SUSE-SU-2018:4236-1 |
| SLES 12 SP3 | libgcrypt | 1.6.1-16.55.1 | SUSE-SU-2018:2452-2, SUSE-SU-2018:2089-1 |
| SLES 12 SP3 | mozilla-nspr | 4.20-19.6.1 | SUSE-SU-2018:4236-1 |
| SLES 12 SP3 | mozilla-nss | 3.40.1-58.18.1 | SUSE-SU-2018:4236-1 |
| SLES 12 SP2 | MozillaFirefox | 60.4.0esr-109.55.1 | SUSE-SU-2018:4236-1 |
| SLES 12 SP2 | mozilla-nspr | 4.20-19.6.1 | SUSE-SU-2018:4236-1 |
| SLES 12 SP2 | mozilla-nss | 3.40.1-58.18.1 | SUSE-SU-2018:4236-1 |
| SLES 12 SP1 | MozillaFirefox | 60.4.0esr-109.55.1 | SUSE-SU-2018:4236-1 |
| SLES 12 SP1 | mozilla-nspr | 4.20-19.6.1 | SUSE-SU-2018:4236-1 |
| SLES 12 SP1 | mozilla-nss | 3.40.1-58.18.1 | SUSE-SU-2018:4236-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 | MozillaFirefox | 60.4.0esr-109.55.1 | SUSE-SU-2018:4236-1 |
| SLES 12 | mozilla-nspr | 4.20-19.6.1 | SUSE-SU-2018:4236-1 |
| SLES 12 | mozilla-nss | 3.40.1-58.18.1 | SUSE-SU-2018:4236-1 |
| SLES for SAP 12 SP4 | MozillaFirefox | 60.4.0esr-109.55.1 | SUSE-SU-2018:4236-1 |
| SLES for SAP 12 SP4 | libgcrypt | 1.6.1-16.62.1 | SUSE-SU-2018:2452-2 |
| SLES for SAP 12 SP4 | mozilla-nspr | 4.20-19.6.1 | SUSE-SU-2018:4236-1 |
| SLES for SAP 12 SP4 | mozilla-nss | 3.40.1-58.18.1 | SUSE-SU-2018:4236-1 |
| SLES for SAP 12 SP3 | MozillaFirefox | 60.4.0esr-109.55.1 | SUSE-SU-2018:4236-1 |
| SLES for SAP 12 SP3 | libgcrypt | 1.6.1-16.55.1 | SUSE-SU-2018:2452-2, SUSE-SU-2018:2089-1 |
| SLES for SAP 12 SP3 | mozilla-nspr | 4.20-19.6.1 | SUSE-SU-2018:4236-1 |
| SLES for SAP 12 SP3 | mozilla-nss | 3.40.1-58.18.1 | SUSE-SU-2018:4236-1 |
| SLES for SAP 12 SP2 | MozillaFirefox | 60.4.0esr-109.55.1 | SUSE-SU-2018:4236-1 |
| SLES for SAP 12 SP2 | mozilla-nspr | 4.20-19.6.1 | SUSE-SU-2018:4236-1 |
| SLES for SAP 12 SP2 | mozilla-nss | 3.40.1-58.18.1 | SUSE-SU-2018:4236-1 |
| SLES for SAP 12 SP1 | MozillaFirefox | 60.4.0esr-109.55.1 | SUSE-SU-2018:4236-2 |
| SLES for SAP 12 SP1 | mozilla-nspr | 4.20-19.6.1 | SUSE-SU-2018:4236-2 |
| SLES for SAP 12 SP1 | mozilla-nss | 3.40.1-58.18.1 | SUSE-SU-2018:4236-2 |
| SUSE OpenStack Cloud 7 | MozillaFirefox | 60.4.0esr-109.55.1 | SUSE-SU-2018:4236-1 |
| SUSE OpenStack Cloud 7 | mozilla-nspr | 4.20-19.6.1 | SUSE-SU-2018:4236-1 |
| SUSE OpenStack Cloud 7 | mozilla-nss | 3.40.1-58.18.1 | SUSE-SU-2018:4236-1 |
| SUSE Enterprise Storage 4 | MozillaFirefox | 60.4.0esr-109.55.1 | SUSE-SU-2018:4236-1 |
| SUSE Enterprise Storage 4 | mozilla-nspr | 4.20-19.6.1 | SUSE-SU-2018:4236-1 |
| SUSE Enterprise Storage 4 | mozilla-nss | 3.40.1-58.18.1 | SUSE-SU-2018:4236-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libgcrypt | 1.9.4-1.2 | openSUSE-SU-2024:10941-1 |
| openSUSE Tumbleweed | mozilla-nss | 3.69.1-1.2 | openSUSE-SU-2024:11058-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | libgcrypt | 1.8.3-r0 | — |
| Alpine v3.24 | libressl | 2.7.4-r0 | — |
| Alpine v3.23 | libgcrypt | 1.8.3-r0 | — |
| Alpine v3.23 | libressl | 2.7.4-r0 | — |
| Alpine v3.22 | libgcrypt | 1.8.3-r0 | — |
| Alpine v3.22 | libressl | 2.7.4-r0 | — |
| Alpine v3.21 | libgcrypt | 1.8.3-r0 | — |
| Alpine v3.21 | libressl | 2.7.4-r0 | — |
| Alpine v3.20 | libgcrypt | 1.8.3-r0 | — |
| Alpine v3.20 | libressl | 2.7.4-r0 | — |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | libgcrypt | 1.8.3-r0 | — |
| Alpine v3.19 | libressl | 2.7.4-r0 | — |
| Alpine v3.18 | libgcrypt | 1.8.3-r0 | — |
| Alpine v3.18 | libressl | 2.7.4-r0 | — |
| Alpine v3.17 | libgcrypt | 1.8.3-r0 | — |
| Alpine v3.17 | libressl | 2.7.4-r0 | — |
| Alpine v3.16 | libgcrypt | 1.8.3-r0 | — |
| Alpine v3.16 | libressl | 2.7.4-r0 | — |
| Alpine v3.15 | libgcrypt | 1.8.3-r0 | — |
| Alpine v3.15 | libressl | 2.7.4-r0 | — |
| Alpine v3.14 | libgcrypt | 1.8.3-r0 | — |
| Alpine v3.14 | libressl | 2.7.4-r0 | — |
| Alpine v3.13 | libgcrypt | 1.8.3-r0 | — |
| Alpine v3.13 | libressl | 2.7.4-r0 | — |
| Alpine v3.12 | libgcrypt | 1.8.3-r0 | — |
| Alpine v3.12 | libressl | 2.7.4-r0 | — |
| Alpine v3.11 | libgcrypt | 1.8.3-r0 | — |
| Alpine v3.11 | libressl | 2.7.4-r0 | — |
| Alpine v3.10 | libgcrypt | 1.8.3-r0 | — |
| Alpine v3.10 | libressl | 2.7.4-r0 | — |
| Alpine v3.9 | libgcrypt | 1.8.3-r0 | — |
| Alpine v3.9 | libressl | 2.7.4-r0 | — |
| Alpine v3.8 | libgcrypt | 1.8.3-r0 | — |
| Alpine v3.8 | libressl | 2.7.4-r0 | — |
| Alpine v3.7 | libgcrypt | 1.8.3-r0 | — |
| Alpine v3.7 | libressl | 2.6.5-r0 | — |
| Alpine v3.6 | libgcrypt | 1.7.10-r0 | — |
| Alpine v3.5 | libgcrypt | 1.7.10-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | nss +4 | 3.44.0-4.amzn2.0.2 | ALAS2-2019-1305 |
| Amazon Linux 2 | openssl +4 | 1:1.0.2k-16.amzn2.0.1 | ALAS2-2018-1102 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | nspr +1 | 4.21.0-1.el7 | ELSA-2019-2237 |
| Oracle Linux 7 | nss +4 | 3.44.0-4.el7 | ELSA-2019-2237 |
| Oracle Linux 7 | nss-softokn +3 | 3.44.0-5.0.1.el7 | ELSA-2019-2237 |
| Oracle Linux 7 | nss-util +1 | 3.44.0-3.el7 | ELSA-2019-2237 |
| Oracle Linux 7 | openssl +4 | 1:1.0.2k-16.0.1.el7 | ELSA-2018-3221 |
Advisories 27
- WID-SEC-2022-0517 Red Hat Enterprise Linux: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 18, 2026
- RHSA-2018:3221 Red Hat Security Advisory: openssl security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 16, 2026
- RHSA-2020:1461 Red Hat Security Advisory: nss-softokn security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2020:1267 Red Hat Security Advisory: nss-softokn security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2020:1345 Red Hat Security Advisory: nss-softokn security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2019:2237 Red Hat Security Advisory: nss, nss-softokn, nss-util, and nspr security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- RHSA-2019:1297 Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.29 SP2 security update Red Hat Security Advisories (RHSA) · Oct 14, 2026
- SSA-398330 SSA-398330: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP >= V3.1.0 and < V3.1.5 Siemens ProductCERT · Oct 13, 2026
- USN-3850-1 nss vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3692-1 openssl, openssl1.0 vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- USN-3689-1 libgcrypt11, libgcrypt20 vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-4231-1 libgcrypt20 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1405-1 libgcrypt20 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2018:4235-1 Security update for MozillaFirefox, mozilla-nspr and mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:11058-1 libfreebl3-3.69.1-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2452-2 Security update for libgcrypt SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:4236-1 Security update for MozillaFirefox, mozilla-nspr and mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:4236-2 Security update for MozillaFirefox, mozilla-nspr and mozilla-nss SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10941-1 libgcrypt-cavs-1.9.4-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:1993-1 Security update for libgcrypt SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:2089-1 Security update for libgcrypt SUSE / openSUSE Security Updates · Feb 4, 2026
- ICSA-23-348-10 Siemens SIMATIC S7-1500 CISA ICS & IT advisories · Aug 12, 2025
- WID-SEC-2025-0267 GnuPGP: Schwachstelle ermöglicht Offenlegung von Informationen BSI CERT-Bund (WID) · Feb 4, 2025
- ALAS2-2019-1305 Moderate: nss security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Oct 2, 2019
- ELSA-2019-2237 Moderate: nss, nss-softokn, nss-util, and nspr security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Aug 13, 2019
- ALAS2-2018-1102 Moderate: openssl security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Nov 8, 2018
- ELSA-2018-3221 Moderate: openssl security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 5, 2018
References
- https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=9010d1576e278a4274ad3f4aa15776c28f6ba965
- 1041144 vdb-entry
- USN-3850-1 vendor-advisory
- 1041147 vdb-entry
- https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/
- USN-3689-1 vendor-advisory
- https://lists.gnupg.org/pipermail/gnupg-announce/2018q2/000426.html
- USN-3689-2 vendor-advisory
- USN-3692-2 vendor-advisory
- [debian-lts-announce] 20180629 [SECURITY] [DLA 1405-1] libgcrypt20 security update mailing-list
- DSA-4231 vendor-advisory
- RHSA-2018:3505 vendor-advisory
- USN-3850-2 vendor-advisory
- USN-3692-1 vendor-advisory
- RHSA-2018:3221 vendor-advisory
- https://dev.gnupg.org/T4011
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
- RHSA-2019:1297 vendor-advisory
- RHSA-2019:1296 vendor-advisory
- RHSA-2019:1543 vendor-advisory
- RHSA-2019:2237 vendor-advisory