CVE-2019-1551rsaz_512_sqr overflow bug on x86_64
Updated under an hour ago ()
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It affects OpenSSL and 8 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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).
- CVSS
- 5.3 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- openssl
- NVD analysis
- Modified
- Record last updated
- Oct 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
OpenSSL OpenSSL openssl:openssl (from the name) | 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) | CNA record |
openssl openssl openssl:openssl | from 1.0.2 through 1.0.2t; from 1.1.1 through 1.1.1d | NVD |
opensuse leap opensuse:leap | 15.1 | NVD |
oracle enterprise_manager_ops_center oracle:enterprise_manager_ops_center | 12.4.0.0 | NVD |
oracle mysql_enterprise_monitor oracle:mysql_enterprise_monitor | through 4.0.12; from 8.0.0 through 8.0.20 | NVD |
oracle peoplesoft_enterprise_peopletools oracle:peoplesoft_enterprise_peopletools | 8.56; 8.57; 8.58 | NVD |
canonical ubuntu_linux canonical:ubuntu_linux | 16.04; 18.04; 19.10 | NVD |
fedoraproject fedora fedoraproject:fedora | 30; 31; 32 | NVD |
debian debian_linux debian:debian_linux | 9.0; 10.0 | NVD |
tenable log_correlation_engine tenable:log_correlation_engine | before 6.0.9 | NVD |
References
- https://seclists.org/bugtraq/2019/Dec/39mailing-list, x-refsource-bugtraq
- https://www.debian.org/security/2019/dsa-4594vendor-advisory, x-refsource-debian
- https://seclists.org/bugtraq/2019/Dec/46mailing-list, x-refsource-bugtraq
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00030.htmlvendor-advisory, x-refsource-suse
- https://security.gentoo.org/glsa/202004-10vendor-advisory, x-refsource-gentoo
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XVEP3LAK4JSPRXFO4QF4GG2IVXADV3SO/vendor-advisory, x-refsource-fedora
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DDHOAATPWJCXRNFMJ2SASDBBNU5RJONY/vendor-advisory, x-refsource-fedora
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EXDDAOWSAIEFQNBHWYE6PPYFV4QXGMCD/vendor-advisory, x-refsource-fedora
- https://usn.ubuntu.com/4376-1/vendor-advisory, x-refsource-ubuntu
- https://www.oracle.com/security-alerts/cpujul2020.htmlx-refsource-misc
- https://www.tenable.com/security/tns-2019-09x-refsource-confirm
- https://www.openssl.org/news/secadv/20191206.txtx-refsource-confirm
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=419102400a2811582a7a3d4a4e317d72e5ce0a8fx-refsource-confirm
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=f1c5eea8a817075d31e43f5876993c6710238c98x-refsource-confirm
- https://security.netapp.com/advisory/ntap-20191210-0001/x-refsource-confirm
- http://packetstormsecurity.com/files/155754/Slackware-Security-Advisory-openssl-Updates.htmlx-refsource-misc
- https://www.tenable.com/security/tns-2020-03x-refsource-confirm
- https://usn.ubuntu.com/4504-1/vendor-advisory, x-refsource-ubuntu
- https://www.oracle.com/security-alerts/cpujan2021.htmlx-refsource-misc
- https://www.tenable.com/security/tns-2020-11x-refsource-confirm
- https://www.debian.org/security/2021/dsa-4855vendor-advisory, x-refsource-debian
- https://www.oracle.com/security-alerts/cpuApr2021.htmlx-refsource-misc
- https://www.tenable.com/security/tns-2021-10x-refsource-confirm
- https://lists.debian.org/debian-lts-announce/2022/03/msg00023.htmlmailing-list, x-refsource-mlist
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.