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).
Fix
Patch, vendor advisory and mitigation references on NVD 8
- https://www.openssl.org/news/secadv/20191206.txt Vendor Advisory
- https://www.oracle.com/security-alerts/cpuApr2021.html Patch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2021.html Patch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2020.html Patch, Third Party Advisory
- https://www.openssl.org/news/secadv/20191206.txt Vendor Advisory
- https://www.oracle.com/security-alerts/cpuApr2021.html Patch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2021.html Patch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2020.html Patch, Third Party Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.3 · openssl, opensuse, oracleNVD modified 2026-10-08 22:16
Affected (CPE criteria) 16
cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*cpe:2.3:a:oracle:enterprise_manager_ops_center:12.4.0.0:*:*:*:*:*:*:*cpe:2.3:a:oracle:mysql_enterprise_monitor:*:*:*:*:*:*:*:*cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.56:*:*:*:*:*:*:*cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.57:*:*:*:*:*:*:*cpe:2.3:a:oracle:peoplesoft_enterprise_peopletools:8.58:*:*:*:*:*:*:*cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*cpe:2.3:a:tenable:log_correlation_engine:*:*:*:*:*:*:*:*
References 48
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00030.html Mailing List, Third Party Advisory
- http://packetstormsecurity.com/files/155754/Slackware-Security-Advisory-openssl-Updates.html Third Party Advisory, VDB Entry
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=419102400a2811582a7a3d4a4e317d72e5ce0a8f
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=f1c5eea8a817075d31e43f5876993c6710238c98
- https://lists.debian.org/debian-lts-announce/2022/03/msg00023.html Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DDHOAATPWJCXRNFMJ2SASDBBNU5RJONY/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EXDDAOWSAIEFQNBHWYE6PPYFV4QXGMCD/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XVEP3LAK4JSPRXFO4QF4GG2IVXADV3SO/
- https://seclists.org/bugtraq/2019/Dec/39 Mailing List, Third Party Advisory
- https://seclists.org/bugtraq/2019/Dec/46 Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202004-10 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20191210-0001/ Third Party Advisory
- https://usn.ubuntu.com/4376-1/ Third Party Advisory
- https://usn.ubuntu.com/4504-1/ Third Party Advisory
- https://www.debian.org/security/2019/dsa-4594 Third Party Advisory
- https://www.debian.org/security/2021/dsa-4855 Third Party Advisory
- https://www.openssl.org/news/secadv/20191206.txt Vendor Advisory
- https://www.oracle.com/security-alerts/cpuApr2021.html Patch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2021.html Patch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2020.html Patch, Third Party Advisory
- https://www.tenable.com/security/tns-2019-09 Third Party Advisory
- https://www.tenable.com/security/tns-2020-03 Third Party Advisory
- https://www.tenable.com/security/tns-2020-11 Third Party Advisory
- https://www.tenable.com/security/tns-2021-10 Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00030.html Mailing List, Third Party Advisory
- http://packetstormsecurity.com/files/155754/Slackware-Security-Advisory-openssl-Updates.html Third Party Advisory, VDB Entry
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=419102400a2811582a7a3d4a4e317d72e5ce0a8f
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=f1c5eea8a817075d31e43f5876993c6710238c98
- https://lists.debian.org/debian-lts-announce/2022/03/msg00023.html Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DDHOAATPWJCXRNFMJ2SASDBBNU5RJONY/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EXDDAOWSAIEFQNBHWYE6PPYFV4QXGMCD/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XVEP3LAK4JSPRXFO4QF4GG2IVXADV3SO/
- https://seclists.org/bugtraq/2019/Dec/39 Mailing List, Third Party Advisory
- https://seclists.org/bugtraq/2019/Dec/46 Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202004-10 Third Party Advisory
- https://security.netapp.com/advisory/ntap-20191210-0001/ Third Party Advisory
- https://usn.ubuntu.com/4376-1/ Third Party Advisory
- https://usn.ubuntu.com/4504-1/ Third Party Advisory
- https://www.debian.org/security/2019/dsa-4594 Third Party Advisory
- https://www.debian.org/security/2021/dsa-4855 Third Party Advisory
- https://www.openssl.org/news/secadv/20191206.txt Vendor Advisory
- https://www.oracle.com/security-alerts/cpuApr2021.html Patch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujan2021.html Patch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2020.html Patch, Third Party Advisory
- https://www.tenable.com/security/tns-2019-09 Third Party Advisory
- https://www.tenable.com/security/tns-2020-03 Third Party Advisory
- https://www.tenable.com/security/tns-2020-11 Third Party Advisory
- https://www.tenable.com/security/tns-2021-10 Third Party Advisory