ROHNP: Key Extraction Side Channel in Multiple Crypto Libraries
Published Jun 13, 2018
5.1
MEDIUMCVSS 3.0
EPSS 0.89%
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 n/a Product Libgcrypt before 1.7.10 and 1.8.x before 1.8.3 Defaultn/a
- Version Libgcrypt before 1.7.10 and 1.8.x before 1.8.3StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n/a | Libgcrypt before 1.7.10 and 1.8.x before 1.8.3 | n/a |
|
Configuration 1
Configuration 2
- 12.04
- 14.04
- 16.04
- 17.10
- 18.04
- 18.10
Configuration 3
- 8.0
- 9.0
Configuration 4
- 3.3
- 7.0
- 7.0
- 7.0
Configuration 5
- 11.1.1.9.0
No data.
JBoss Core Services Apache HTTP Server 2.4.29 SP2
n/a
Fixed · RHSA-2019:1296
JBoss Core Services Apache HTTP Server 2.4.29 SP2
openssl
Fixed · RHSA-2019:1543
JBoss Core Services on RHEL 6
jbcs-httpd24-httpd-0:2.4.29-40.jbcs.el6
Fixed · RHSA-2019:1297
JBoss Core Services on RHEL 6
jbcs-httpd24-openssl-1:1.0.2n-15.jbcs.el6
Fixed · RHSA-2019:1297
JBoss Core Services on RHEL 7
jbcs-httpd24-httpd-0:2.4.29-40.jbcs.el7
Fixed · RHSA-2019:1297
JBoss Core Services on RHEL 7
jbcs-httpd24-openssl-1:1.0.2n-15.jbcs.el7
Fixed · RHSA-2019:1297
Red Hat Ansible Tower 3.4 for RHEL 7
ansible-tower-34/ansible-tower-memcached:1.4.15-28
Fixed · RHBA-2020:0547
Red Hat Ansible Tower 3.4 for RHEL 7
ansible-tower-35/ansible-tower-memcached:1.4.15-28
Fixed · RHBA-2020:0547
Red Hat Ansible Tower 3.4 for RHEL 7
ansible-tower-37/ansible-tower-memcached-rhel7:1.4.15-28
Fixed · RHBA-2020:0547
Red Hat Enterprise Linux 7
nspr-0:4.21.0-1.el7
Fixed · RHSA-2019:2237
Red Hat Enterprise Linux 7
nss-0:3.44.0-4.el7
Fixed · RHSA-2019:2237
Red Hat Enterprise Linux 7
nss-softokn-0:3.44.0-5.el7
Fixed · RHSA-2019:2237
Red Hat Enterprise Linux 7
nss-util-0:3.44.0-3.el7
Fixed · RHSA-2019:2237
Red Hat Enterprise Linux 7
openssl-1:1.0.2k-16.el7
Fixed · RHSA-2018:3221
Red Hat Enterprise Linux 7.4 Advanced Update Support
nss-softokn-0:3.28.3-9.el7_4
Fixed · RHSA-2020:1345
Red Hat Enterprise Linux 7.4 Telco Extended Update Support
nss-softokn-0:3.28.3-9.el7_4
Fixed · RHSA-2020:1345
Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions
nss-softokn-0:3.28.3-9.el7_4
Fixed · RHSA-2020:1345
Red Hat Enterprise Linux 7.5 Extended Update Support
nss-softokn-0:3.36.0-6.el7_5
Fixed · RHSA-2020:1267
Red Hat Enterprise Linux 7.6 Extended Update Support
nss-softokn-0:3.36.0-6.el7_6
Fixed · RHSA-2020:1461
CloudForms Management Engine 5
libtomcrypt
Will not fix
Red Hat Enterprise Linux 5
libgcrypt
Not affected
Red Hat Enterprise Linux 5
nss
Will not fix
Red Hat Enterprise Linux 5
openssl
Will not fix
Red Hat Enterprise Linux 5
openssl097a
Will not fix
Red Hat Enterprise Linux 6
libgcrypt
Not affected
Red Hat Enterprise Linux 6
nss
Will not fix
Red Hat Enterprise Linux 6
openssl
Will not fix
Red Hat Enterprise Linux 6
openssl098e
Will not fix
Red Hat Enterprise Linux 7
OVMF
Will not fix
Red Hat Enterprise Linux 7
libgcrypt
Not affected
Red Hat Enterprise Linux 7
openssl098e
Will not fix
Red Hat Enterprise Linux 8
libgcrypt
Not affected
Red Hat Enterprise Linux 8
nss
Not affected
Red Hat Enterprise Linux 8
openssl
Not affected
Red Hat JBoss Enterprise Application Platform 5
openssl
Out of support scope
Red Hat JBoss Enterprise Application Platform 6
openssl
Will not fix
Red Hat JBoss Enterprise Application Platform 7
bouncycastle
Not affected
Red Hat JBoss Enterprise Web Server 2
openssl
Will not fix
Red Hat JBoss Web Server 3
openssl
Affected
Red Hat Satellite 6
bouncycastle
Not affected
Red Hat Subscription Asset Manager
bouncycastle
Not affected
Red Hat Virtualization 4
bouncycastle
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| JBoss Core Services Apache HTTP Server 2.4.29 SP2 | n/a | Fixed | RHSA-2019:1296 |
| JBoss Core Services Apache HTTP Server 2.4.29 SP2 | openssl | Fixed | RHSA-2019:1543 |
| JBoss Core Services on RHEL 6 | jbcs-httpd24-httpd-0:2.4.29-40.jbcs.el6 | Fixed | RHSA-2019:1297 |
| JBoss Core Services on RHEL 6 | jbcs-httpd24-openssl-1:1.0.2n-15.jbcs.el6 | Fixed | RHSA-2019:1297 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-httpd-0:2.4.29-40.jbcs.el7 | Fixed | RHSA-2019:1297 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-openssl-1:1.0.2n-15.jbcs.el7 | Fixed | RHSA-2019:1297 |
| Red Hat Ansible Tower 3.4 for RHEL 7 | ansible-tower-34/ansible-tower-memcached:1.4.15-28 | Fixed | RHBA-2020:0547 |
| Red Hat Ansible Tower 3.4 for RHEL 7 | ansible-tower-35/ansible-tower-memcached:1.4.15-28 | Fixed | RHBA-2020:0547 |
| Red Hat Ansible Tower 3.4 for RHEL 7 | ansible-tower-37/ansible-tower-memcached-rhel7:1.4.15-28 | Fixed | RHBA-2020:0547 |
| Red Hat Enterprise Linux 7 | nspr-0:4.21.0-1.el7 | Fixed | RHSA-2019:2237 |
| Red Hat Enterprise Linux 7 | nss-0:3.44.0-4.el7 | Fixed | RHSA-2019:2237 |
| Red Hat Enterprise Linux 7 | nss-softokn-0:3.44.0-5.el7 | Fixed | RHSA-2019:2237 |
| Red Hat Enterprise Linux 7 | nss-util-0:3.44.0-3.el7 | Fixed | RHSA-2019:2237 |
| Red Hat Enterprise Linux 7 | openssl-1:1.0.2k-16.el7 | Fixed | RHSA-2018:3221 |
| Red Hat Enterprise Linux 7.4 Advanced Update Support | nss-softokn-0:3.28.3-9.el7_4 | Fixed | RHSA-2020:1345 |
| Red Hat Enterprise Linux 7.4 Telco Extended Update Support | nss-softokn-0:3.28.3-9.el7_4 | Fixed | RHSA-2020:1345 |
| Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions | nss-softokn-0:3.28.3-9.el7_4 | Fixed | RHSA-2020:1345 |
| Red Hat Enterprise Linux 7.5 Extended Update Support | nss-softokn-0:3.36.0-6.el7_5 | Fixed | RHSA-2020:1267 |
| Red Hat Enterprise Linux 7.6 Extended Update Support | nss-softokn-0:3.36.0-6.el7_6 | Fixed | RHSA-2020:1461 |
| CloudForms Management Engine 5 | libtomcrypt | Will not fix | n/a |
| Red Hat Enterprise Linux 5 | libgcrypt | Not affected | n/a |
| Red Hat Enterprise Linux 5 | nss | Will not fix | n/a |
| Red Hat Enterprise Linux 5 | openssl | Will not fix | n/a |
| Red Hat Enterprise Linux 5 | openssl097a | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | libgcrypt | Not affected | n/a |
| Red Hat Enterprise Linux 6 | nss | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | openssl | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | openssl098e | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | OVMF | Will not fix | n/a |
| Red Hat Enterprise Linux 7 | libgcrypt | Not affected | n/a |
| Red Hat Enterprise Linux 7 | openssl098e | Will not fix | n/a |
| Red Hat Enterprise Linux 8 | libgcrypt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | nss | Not affected | n/a |
| Red Hat Enterprise Linux 8 | openssl | Not affected | n/a |
| Red Hat JBoss Enterprise Application Platform 5 | openssl | Out of support scope | n/a |
| Red Hat JBoss Enterprise Application Platform 6 | openssl | Will not fix | n/a |
| Red Hat JBoss Enterprise Application Platform 7 | bouncycastle | Not affected | n/a |
| Red Hat JBoss Enterprise Web Server 2 | openssl | Will not fix | n/a |
| Red Hat JBoss Web Server 3 | openssl | Affected | n/a |
| Red Hat Satellite 6 | bouncycastle | Not affected | n/a |
| Red Hat Subscription Asset Manager | bouncycastle | Not affected | n/a |
| Red Hat Virtualization 4 | bouncycastle | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Since the 5.8.3 release, Red Hat CloudForms no longer uses libtomcrypt.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
1 other source (Red Hat) ▾
CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
AV:L/AC:M/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (17 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.89% (0.00887) | 57.82th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.89% (0.00887) | 54.42th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.28% (0.00276) | 48.13th | v4 (v2025.03.14) |
| Mar 29, 2025 | 8.19% (0.08185) | 86.73th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.28% (0.00281) | 49.49th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.08% (0.00077) | 34.88th | v3 (v2023.03.01) |
| Jul 17, 2024 | 0.08% (0.00077) | 33.38th | v3 (v2023.03.01) |
| Jun 7, 2023 | 0.08% (0.00077) | 31.37th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.07% (0.00070) | 28.60th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.55% (0.01547) | 74.98th | v2 (v2022.01.01) |
| Feb 23, 2023 | 1.55% (0.01547) | 74.94th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.55% (0.01547) | 72.92th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.55% (0.01547) | 51.82th | v2 (v2022.01.01) |
| Feb 3, 2022 | 4.47% (0.04466) | 74.74th | v1 |
| Jan 6, 2022 | 4.47% (0.04466) | 74.53th | v1 |
| Sep 1, 2021 | 4.47% (0.04466) | 83.85th | v1 |
| Apr 14, 2021 | 4.47% (0.04466) | 0.00th | v1 |
References (25)
- http://www.securitytracker.com/id/1041144 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041147 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:3221 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2018:3505 vendor-advisoryx_refsource_REDHATThird Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1296 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2019:1297 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2019:1543 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2019:2237 vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2018-0495 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1591163 Issue Tracking
- https://dev.gnupg.org/T4011 x_refsource_MISCPatchVendor Advisory
- https://git.gnupg.org/cgi-bin/gitweb.cgi?p=libgcrypt.git%3Ba=commit%3Bh=9010d1576e278a4274ad3f4aa15776c28f6ba965 x_refsource_MISC
- https://lists.debian.org/debian-lts-announce/2018/06/msg00013.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://lists.gnupg.org/pipermail/gnupg-announce/2018q2/000426.html x_refsource_MISCVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-0495
- https://usn.ubuntu.com/3689-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3689-2/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3692-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3692-2/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3850-1/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://usn.ubuntu.com/3850-2/ vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2018-0495
- https://www.debian.org/security/2018/dsa-4231 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- https://www.nccgroup.trust/us/our-research/technical-advisory-return-of-the-hidden-number-problem/ x_refsource_MISCExploitThird Party Advisory
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html x_refsource_MISCPatchThird Party Advisory
Change history (0)
No recorded changes yet.