rsaz_512_sqr overflow bug on x86_64

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Summary

CVECVE-2019-1551
StatePUBLISHED
Assigneropenssl
Source PriorityCVE Program / NVD first with legacy fallback
Published2019-12-06 18:15:12 UTC
Updated2026-10-08 22:16:51 UTC
DescriptionThere 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).

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

EPSS: 0.142980000 probability, percentile 0.965800000 (date 2026-10-20)

Problem Types: CWE-190 | Integer overflow bug

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
2.0[email protected]Primary5AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None

AV:N/AC:L/Au:N/C:P/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Canonical Ubuntu Linux 16.04 All All All
Operating System Canonical Ubuntu Linux 18.04 All All All
Operating System Canonical Ubuntu Linux 19.10 All All All
Operating System Debian Debian Linux 10.0 All All All
Operating System Debian Debian Linux 9.0 All All All
Operating System Fedoraproject Fedora 30 All All All
Operating System Fedoraproject Fedora 31 All All All
Operating System Fedoraproject Fedora 32 All All All
Application Openssl Openssl All All All All
Application Openssl Openssl All All All All
Operating System Opensuse Leap 15.1 All All All
Application Oracle Enterprise Manager Ops Center 12.4.0.0 All All All
Application Oracle Mysql Enterprise Monitor All All All All
Application Oracle Mysql Enterprise Monitor All All All All
Application Oracle Peoplesoft Enterprise Peopletools 8.56 All All All
Application Oracle Peoplesoft Enterprise Peopletools 8.57 All All All
Application Oracle Peoplesoft Enterprise Peopletools 8.58 All All All
Application Tenable Log Correlation Engine All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA OpenSSL OpenSSL affected Fixed in OpenSSL 1.1.1e (Affected 1.1.1-1.1.1d) Not specified
CNA OpenSSL OpenSSL affected Fixed in OpenSSL 1.0.2u (Affected 1.0.2-1.0.2t) Not specified

References

ReferenceSourceLinkTags
git.openssl.org Git - openssl.git/commitdiff af854a3a-2127-422b-91ae-364da2661108 git.openssl.org
Bugtraq: [SECURITY] [DSA 4594-1] openssl1.0 security update af854a3a-2127-422b-91ae-364da2661108 seclists.org Mailing List, Third Party Advisory
Slackware Security Advisory - openssl Updates ≈ Packet Storm af854a3a-2127-422b-91ae-364da2661108 packetstormsecurity.com Third Party Advisory, VDB Entry
[SECURITY] Fedora 30 Update: openssl-1.1.1g-1.fc30 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
Debian -- Security Information -- DSA-4594-1 openssl1.0 af854a3a-2127-422b-91ae-364da2661108 www.debian.org Third Party Advisory
USN-4504-1: OpenSSL vulnerabilities | Ubuntu security notices | Ubuntu af854a3a-2127-422b-91ae-364da2661108 usn.ubuntu.com Third Party Advisory
[R1] Tenable.sc 5.13.0 Fixes Multiple Third-Party Vulnerabilities - Security Advisory | Tenable® af854a3a-2127-422b-91ae-364da2661108 www.tenable.com Third Party Advisory
www.openssl.org/news/secadv/20191206.txt af854a3a-2127-422b-91ae-364da2661108 www.openssl.org Vendor Advisory
OpenSSL: Multiple vulnerabilities (GLSA 202004-10) — Gentoo security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org Third Party Advisory
Oracle Critical Patch Update Advisory - January 2021 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
[R1] Nessus Agent 7.6.3 Fixes Multiple Third-party Vulnerabilities - Security Advisory | Tenable® af854a3a-2127-422b-91ae-364da2661108 www.tenable.com Third Party Advisory
git.openssl.org Git - openssl.git/commitdiff af854a3a-2127-422b-91ae-364da2661108 git.openssl.org
[security-announce] openSUSE-SU-2020:0062-1: moderate: Security update f af854a3a-2127-422b-91ae-364da2661108 lists.opensuse.org Mailing List, Third Party Advisory
Oracle Critical Patch Update Advisory - April 2021 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
[SECURITY] [DLA 2952-1] openssl security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
Bugtraq: [slackware-security] openssl (SSA:2019-354-01) af854a3a-2127-422b-91ae-364da2661108 seclists.org Mailing List, Third Party Advisory
[SECURITY] Fedora 31 Update: openssl-1.1.1g-1.fc31 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
[R1] LCE 6.0.9 Fixes Multiple Third-party Vulnerabilities - Security Advisory | Tenable® af854a3a-2127-422b-91ae-364da2661108 www.tenable.com Third Party Advisory
Debian -- Security Information -- DSA-4855-1 openssl af854a3a-2127-422b-91ae-364da2661108 www.debian.org Third Party Advisory
[R1] Tenable.sc 5.17.0 Fixes Multiple Vulnerabilities - Security Advisory | Tenable® af854a3a-2127-422b-91ae-364da2661108 www.tenable.com Third Party Advisory
[SECURITY] Fedora 32 Update: openssl-1.1.1g-1.fc32 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
USN-4376-1: OpenSSL vulnerabilities | Ubuntu security notices | Ubuntu af854a3a-2127-422b-91ae-364da2661108 usn.ubuntu.com Third Party Advisory
Oracle Critical Patch Update Advisory - July 2020 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com Patch, Third Party Advisory
CVE-2019-1551 OpenSSL Vulnerability in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
git.openssl.org Git - openssl.git/commitdiff MITRE git.openssl.org
git.openssl.org Git - openssl.git/commitdiff MITRE git.openssl.org
[SECURITY] Fedora 31 Update: openssl-1.1.1g-1.fc31 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 30 Update: openssl-1.1.1g-1.fc30 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 32 Update: openssl-1.1.1g-1.fc32 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: OSS-Fuzz and Guido Vranken (en)

Legacy QID Mappings

  • 179132 Debian Security Update for Open Secure Sockets Layer (OpenSSL) (DLA 2952-1)
  • 296075 Oracle Solaris 11.4 Support Repository Update (SRU) 21.69.0 Missing (CPUAPR2020)
  • 352487 Amazon Linux Security Advisory for openssl: ALAS2-2021-1687
  • 500494 Alpine Linux Security Update for Open Secure Sockets Layer (OpenSSL)
  • 500562 Alpine Linux Security Update for Open Secure Sockets Layer (OpenSSL)
  • 500761 Alpine Linux Security Update for openssl
  • 501161 Alpine Linux Security Update for openssl
  • 501980 Alpine Linux Security Update for Open Secure Sockets Layer3 (OpenSSL3)
  • 502899 Alpine Linux Security Update for openssl1.1-compat
  • 504253 Alpine Linux Security Update for openssl
  • 670251 EulerOS Security Update for Open Secure Sockets Layer (OpenSSL) (EulerOS-SA-2021-1825)
  • 770068 Red Hat OpenShift Container Platform 4.6 Security Update (RHSA-2021:0436)

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