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TI-2019-01188 Aliases CVE-2019-1551GHSA-fcc6-m5v9-xcgq

rsaz_512_sqr overflow bug on x86_64

Priority MEDIUM 45CWE-190Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · None · None
Fix status
Partial Red Hat: 4 fixed, 4 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.

Summary

There is an overflow bug in the x64_64 Montgomery squaring procedure used in exponentiation with 512-bit moduli. No EC algorithms are affected. Analysis suggests that attacks against 2-prime RSA1024, 3-prime RSA1536, and DSA1024 as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH512 are considered just feasible. However, for an attack the target would have to re-use the DH512 private key, which is not recommended anyway. Also applications directly using the low level API BN_mod_exp may be affected if they use BN_FLG_CONSTTIME. Fixed in OpenSSL 1.1.1e (Affected 1.1.1-1.1.1d). Fixed in OpenSSL 1.0.2u (Affected 1.0.2-1.0.2t).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.14298 96th percentileScored 2026-11-07
Fix Partial Red Hat: 3 advisoriesRed Hat: 4 fixed, 4 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OpenSSLOpenSSLFixed in OpenSSL 1.1.1e (Affected 1.1.1-1.1.1d); Fixed in OpenSSL 1.0.2u (Affected 1.0.2-1.0.2t)—No fix listedCNA
  • OpenSSL VendorOpenSSL Affected Fixed in OpenSSL 1.1.1e (Affected 1.1.1-1.1.1d); Fixed in OpenSSL 1.0.2u (Affected 1.0.2-1.0.2t) Fixed in — No fix listed CNA

CPE configurations NVD · 16

CPEVersionsRoleVendor
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*1.0.2 – 1.0.2t; 1.1.1 – 1.1.1dVulnerableOpenSSL
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*15.1VulnerableopenSUSE
cpe:2.3:a:oracle:enterprise_manager_ops_center:12.4.0.0:*:*:*:*:*:*:*12.4.0.0VulnerableOracle
cpe:2.3:a:oracle:mysql_enterprise_monitor:*:*:*:*:*:*:*:*up to 4.0.12; 8.0.0 – 8.0.20VulnerableOracle
cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.56:*:*:*:*:*:*:*8.56VulnerableOracle
cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.57:*:*:*:*:*:*:*8.57VulnerableOracle
cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.58:*:*:*:*:*:*:*8.58VulnerableOracle
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*16.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*18.04VulnerableCanonical
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*19.10VulnerableCanonical
  • cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:* Versions 1.0.2 – 1.0.2t; 1.1.1 – 1.1.1d Vulnerable ·OpenSSL
  • cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE
  • cpe:2.3:a:oracle:enterprise_manager_ops_center:12.4.0.0:*:*:*:*:*:*:* Versions 12.4.0.0 Vulnerable ·Oracle
  • cpe:2.3:a:oracle:mysql_enterprise_monitor:*:*:*:*:*:*:*:* Versions up to 4.0.12; 8.0.0 – 8.0.20 Vulnerable ·Oracle
  • cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.56:*:*:*:*:*:*:* Versions 8.56 Vulnerable ·Oracle
  • cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.57:*:*:*:*:*:*:* Versions 8.57 Vulnerable ·Oracle
  • cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.58:*:*:*:*:*:*:* Versions 8.58 Vulnerable ·Oracle
  • cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* Versions 16.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:* Versions 18.04 Vulnerable ·Canonical
  • cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:* Versions 19.10 Vulnerable ·Canonical
Show 6 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*30VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*31VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*32VulnerableFedoraproject
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*10.0VulnerableDebian
cpe:2.3:a:tenable:log_correlation_engine:*:*:*:*:*:*:*:*before 6.0.9VulnerableTenable
  • cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:* Versions 30 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* Versions 31 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:* Versions 32 Vulnerable ·Fedoraproject
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
  • cpe:2.3:a:tenable:log_correlation_engine:*:*:*:*:*:*:*:* Versions before 6.0.9 Vulnerable ·Tenable

Remediation

Red Hat 3 advisories

  • RHSA-2020:4514 Released 2020-11-04 · Red Hat rating Low
    openssl security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS (v. 8) openssl-1:1.1.1g-11.el8, openssl-devel-1:1.1.1g-11.el8, openssl-libs-1:1.1.1g-11.el8 +1
  • RHSA-2020:4384 Released 2020-10-28 · Red Hat rating Moderate
    Red Hat JBoss Core Services Apache HTTP Server 2.4.37 SP5 security update
    • Red Hat JBoss Core Services on RHEL 6 Server jbcs-httpd24-apr-1.6.3-104.jbcs.el6, jbcs-httpd24-apr-devel-1.6.3-104.jbcs.el6, jbcs-httpd24-apr-util-1.6.1-75.jbcs.el6 +38
    • Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-apr-1.6.3-104.jbcs.el7, jbcs-httpd24-apr-devel-1.6.3-104.jbcs.el7, jbcs-httpd24-apr-util-1.6.1-75.jbcs.el7 +39
  • RHSA-2020:4383 Released 2020-10-28 · Red Hat rating Moderate
    Red Hat JBoss Core Services Apache HTTP Server 2.4.37 SP5 security update
    • Red Hat JBoss Core Services

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 7AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux 8AffectedNo fix yet: Fix deferred
Red Hat JBoss Enterprise Application Platform 6AffectedNo fix planned: Out of support scope
Red Hat JBoss Enterprise Web Server 2AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2020:4514
Red Hat JBoss Core ServicesFixed RHSA-2020:4383
Red Hat JBoss Core Services on RHEL 6 ServerFixed RHSA-2020:4384
Red Hat JBoss Core Services on RHEL 7 ServerFixed RHSA-2020:4384
Not affected: 3 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-1551
  2. 2026-10-03 Alias added: GHSA-fcc6-m5v9-xcgq
  3. 2026-10-08 CISA SSVC decision points changed
  4. 2026-10-09 Priority changed: LOW → MEDIUM

References

Patch 3

Advisory 19

Other 2

  • TI-2022-01915 The c_rehash script allows command injection CVSS 3.1CRITICAL 9.8
  • TI-2021-02645 SM2 Decryption Buffer Overflow CVSS 3.1CRITICAL 9.8
  • TI-2009-03392 The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft… CVSS 3.1CRITICAL 9.8
  • TI-2022-01176 The c_rehash script allows command injection CVSS 3.1CRITICAL 9.8
  • TI-2014-00154 The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly… KEVCVSS 3.1HIGH 7.5
  • TI-2025-14107 Stack buffer overflow in CMS (Auth)EnvelopedData parsing CVSS 3.1HIGH 8.8
See all 312 →

Sources

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