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TI-2018-00452 Aliases CVE-2018-0495GHSA-q2v2-pgm4-m8c8

Observable discrepancy in Libgcrypt before 1.7.10 and 1.8.x before 1.8.3

Priority LOW 23CWE-203Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 23 fixed, 8 without a fix

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-203.

Summary

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.

Why it matters now

EPSS 0.00869 59th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Partial Red Hat: 8 advisoriesRed Hat: 23 fixed, 8 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
—Libgcrypt before 1.7.10 and 1.8.x before 1.8.3Libgcrypt before 1.7.10 and 1.8.x before 1.8.3—No fix listedCNA
  • Libgcrypt before 1.7.10 and 1.8.x before 1.8.3 Vendor— Affected Libgcrypt before 1.7.10 and 1.8.x before 1.8.3 Fixed in — No fix listed CNA

CPE configurations NVD · 14

CPEVersionsRoleVendor
cpe:2.3:a:gnupg:libgcrypt:*:*:*:*:*:*:*:*before 1.7.10; 1.8.0 to before 1.8.3VulnerableGnuPG
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*12.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*14.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:*17.10VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*18.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*18.10VulnerableCanonical
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:a:redhat:ansible_tower:3.3:*:*:*:*:*:*:*3.3VulnerableRed Hat
  • cpe:2.3:a:gnupg:libgcrypt:*:*:*:*:*:*:*:* Versions before 1.7.10; 1.8.0 to before 1.8.3 Vulnerable ·GnuPG
  • cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:* Versions 12.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* Versions 14.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:17.10:*:*:*:*:*:*:* Versions 17.10 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:* Versions 18.10 Vulnerable ·Canonical
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:a:redhat:ansible_tower:3.3:*:*:*:*:*:*:* Versions 3.3 Vulnerable ·Red Hat
Show 4 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*7.0VulnerableRed Hat
cpe:2.3:a:oracle:traffic_director:11.1.1.9.0:*:*:*:*:*:*:*11.1.1.9.0VulnerableOracle
  • cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_server:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
  • cpe:2.3:a:oracle:traffic_director:11.1.1.9.0:*:*:*:*:*:*:* Versions 11.1.1.9.0 Vulnerable ·Oracle

Remediation

Red Hat 8 advisories

  • RHSA-2020:1461 Released 2020-04-14 · Red Hat rating Important
    nss-softokn security update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.6) nss-softokn-3.36.0-6.el7_6, nss-softokn-freebl-3.36.0-6.el7_6
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6) nss-softokn-devel-3.36.0-6.el7_6, nss-softokn-freebl-devel-3.36.0-6.el7_6
    • Red Hat Enterprise Linux Server EUS (v. 7.6) nss-softokn-3.36.0-6.el7_6, nss-softokn-3.36.0-6.el7_6.ppc, nss-softokn-devel-3.36.0-6.el7_6 +5
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) nss-softokn-3.36.0-6.el7_6, nss-softokn-devel-3.36.0-6.el7_6, nss-softokn-freebl-3.36.0-6.el7_6 +1
  • RHSA-2020:1345 Released 2020-04-07 · Red Hat rating Important
    nss-softokn security update
    • Red Hat Enterprise Linux Server AUS (v. 7.4) nss-softokn-3.28.3-9.el7_4, nss-softokn-devel-3.28.3-9.el7_4, nss-softokn-freebl-3.28.3-9.el7_4 +1
    • Red Hat Enterprise Linux Server E4S (v. 7.4) nss-softokn-3.28.3-9.el7_4, nss-softokn-devel-3.28.3-9.el7_4, nss-softokn-freebl-3.28.3-9.el7_4 +1
    • Red Hat Enterprise Linux Server TUS (v. 7.4) nss-softokn-3.28.3-9.el7_4, nss-softokn-devel-3.28.3-9.el7_4, nss-softokn-freebl-3.28.3-9.el7_4 +1
  • RHSA-2020:1267 Released 2020-04-01 · Red Hat rating Important
    nss-softokn security update
    • Red Hat Enterprise Linux ComputeNode EUS (v. 7.5) nss-softokn-3.36.0-6.el7_5, nss-softokn-freebl-3.36.0-6.el7_5
    • Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.5) nss-softokn-devel-3.36.0-6.el7_5, nss-softokn-freebl-devel-3.36.0-6.el7_5
    • Red Hat Enterprise Linux Server EUS (v. 7.5) nss-softokn-3.36.0-6.el7_5, nss-softokn-3.36.0-6.el7_5.ppc, nss-softokn-devel-3.36.0-6.el7_5 +5
Show 5 more Red Hat advisories
  • RHSA-2019:2237 Released 2019-08-06 · Red Hat rating Moderate
    nss, nss-softokn, nss-util, and nspr security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Client (v. 7) nspr-4.21.0-1.el7, nss-3.44.0-4.el7, nss-softokn-3.44.0-5.el7 +4
    • Red Hat Enterprise Linux Client Optional (v. 7) nspr-devel-4.21.0-1.el7, nss-devel-3.44.0-4.el7, nss-pkcs11-devel-3.44.0-4.el7 +3
    • Red Hat Enterprise Linux ComputeNode (v. 7) nspr-4.21.0-1.el7, nss-3.44.0-4.el7, nss-softokn-3.44.0-5.el7 +4
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) nspr-devel-4.21.0-1.el7, nss-devel-3.44.0-4.el7, nss-pkcs11-devel-3.44.0-4.el7 +3
    • Red Hat Enterprise Linux Server (v. 7) nspr-4.21.0-1.el7, nspr-4.21.0-1.el7.ppc, nspr-devel-4.21.0-1.el7 +19
    • Red Hat Enterprise Linux Server Optional (v. 7) nss-pkcs11-devel-3.44.0-4.el7, nss-pkcs11-devel-3.44.0-4.el7.ppc
    • Red Hat Enterprise Linux Workstation (v. 7) nspr-4.21.0-1.el7, nspr-devel-4.21.0-1.el7, nss-3.44.0-4.el7 +9
    • Red Hat Enterprise Linux Workstation Optional (v. 7) nss-pkcs11-devel-3.44.0-4.el7
  • RHSA-2019:1543 Released 2019-06-18 · Red Hat rating Important
    Red Hat JBoss Core Services Apache HTTP Server 2.4.29 SP2 security update
    • JBoss Core Services Apache HTTP Server 2.4.29 SP2
  • RHSA-2019:1297 Released 2019-05-30 · Red Hat rating Important
    Red Hat JBoss Core Services Apache HTTP Server 2.4.29 SP2 security update
    • Red Hat JBoss Core Services on RHEL 6 Server jbcs-httpd24-httpd-2.4.29-40.jbcs.el6, jbcs-httpd24-httpd-devel-2.4.29-40.jbcs.el6, jbcs-httpd24-httpd-manual-2.4.29-40.jbcs.el6 +11
    • Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-httpd-2.4.29-40.jbcs.el7, jbcs-httpd24-httpd-devel-2.4.29-40.jbcs.el7, jbcs-httpd24-httpd-manual-2.4.29-40.jbcs.el7 +11
  • RHSA-2019:1296 Released 2019-05-30 · Red Hat rating Important
    Red Hat JBoss Core Services Apache HTTP Server 2.4.29 SP2 security update
    • JBoss Core Services Apache HTTP Server 2.4.29 SP2
  • RHSA-2018:3221 Released 2018-10-30 · Red Hat rating Moderate
    openssl security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Client (v. 7) openssl-1:1.0.2k-16.el7, openssl-libs-1:1.0.2k-16.el7
    • Red Hat Enterprise Linux Client Optional (v. 7) openssl-devel-1:1.0.2k-16.el7, openssl-perl-1:1.0.2k-16.el7, openssl-static-1:1.0.2k-16.el7
    • Red Hat Enterprise Linux ComputeNode (v. 7) openssl-1:1.0.2k-16.el7, openssl-libs-1:1.0.2k-16.el7
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) openssl-devel-1:1.0.2k-16.el7, openssl-perl-1:1.0.2k-16.el7, openssl-static-1:1.0.2k-16.el7
    • Red Hat Enterprise Linux Server (v. 7) openssl-1:1.0.2k-16.el7, openssl-devel-1:1.0.2k-16.el7, openssl-devel-1:1.0.2k-16.el7.ppc +2
    • Red Hat Enterprise Linux Server Optional (v. 7) openssl-perl-1:1.0.2k-16.el7, openssl-static-1:1.0.2k-16.el7, openssl-static-1:1.0.2k-16.el7.ppc
    • Red Hat Enterprise Linux Workstation (v. 7) openssl-1:1.0.2k-16.el7, openssl-devel-1:1.0.2k-16.el7, openssl-libs-1:1.0.2k-16.el7
    • Red Hat Enterprise Linux Workstation Optional (v. 7) openssl-perl-1:1.0.2k-16.el7, openssl-static-1:1.0.2k-16.el7
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) openssl-1:1.0.2k-16.el7, openssl-devel-1:1.0.2k-16.el7, openssl-libs-1:1.0.2k-16.el7
    • Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) openssl-perl-1:1.0.2k-16.el7, openssl-static-1:1.0.2k-16.el7

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
CloudForms Management Engine 5AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux 5AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux 7AffectedNo fix planned: Will not fix
Red Hat JBoss Enterprise Application Platform 5AffectedNo fix planned: Out of support scope
Red Hat JBoss Enterprise Application Platform 6AffectedNo fix planned: Will not fix
Red Hat JBoss Enterprise Web Server 2AffectedNo fix planned: Will not fix
Red Hat JBoss Web Server 3AffectedNo fix yet
JBoss Core Services Apache HTTP Server 2.4.29 SP2Fixed RHSA-2019:1543
Red Hat Ansible Tower 3.4 for RHEL 7 ServerFixed—
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2018:3221, RHSA-2019:2237
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2018:3221, RHSA-2019:2237
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2018:3221, RHSA-2019:2237
Red Hat Enterprise Linux ComputeNode EUS (v. 7.5)Fixed RHSA-2020:1267
Red Hat Enterprise Linux ComputeNode EUS (v. 7.6)Fixed RHSA-2020:1461
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2018:3221, RHSA-2019:2237
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.5)Fixed RHSA-2020:1267
Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.6)Fixed RHSA-2020:1461
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2018:3221, RHSA-2019:2237
Red Hat Enterprise Linux Server AUS (v. 7.4)Fixed RHSA-2020:1345
Red Hat Enterprise Linux Server E4S (v. 7.4)Fixed RHSA-2020:1345
Red Hat Enterprise Linux Server EUS (v. 7.5)Fixed RHSA-2020:1267
Red Hat Enterprise Linux Server EUS (v. 7.6)Fixed RHSA-2020:1461
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2018:3221, RHSA-2019:2237
Red Hat Enterprise Linux Server TUS (v. 7.4)Fixed RHSA-2020:1345
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2018:3221, RHSA-2019:2237
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2018:3221, RHSA-2019:2237
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7)Fixed RHSA-2018:3221, RHSA-2020:1461
Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7)Fixed RHSA-2018:3221
Red Hat JBoss Core Services on RHEL 6 ServerFixed RHSA-2019:1297
Red Hat JBoss Core Services on RHEL 7 ServerFixed RHSA-2019:1297
Not affected: 8 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat JBoss Enterprise Application Platform 7
  • Red Hat Satellite 6
  • Red Hat Subscription Asset Manager
  • Red Hat Virtualization 4

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-0495
  2. 2026-10-03 Alias added: GHSA-q2v2-pgm4-m8c8

References

Exploit 1

Patch 2

Advisory 15

Other 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences