CVE-2019-1551

rsaz_512_sqr overflow bug on x86_64

Published Dec 6, 2019 CVSS 3.1 · 5.3 Medium EPSS 14.3% KEV · Not listed
Description
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).

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-2952-1 openssl security update
Debian DSA Debian DSA DSA-4594-1 openssl1.0 security update
Debian DSA Debian DSA DSA-4855-1 openssl security update
EUVD EUVD EUVD-2019-10108 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).
Ubuntu USN Ubuntu USN USN-4376-1 OpenSSL vulnerabilities
Ubuntu USN Ubuntu USN USN-4504-1 OpenSSL vulnerabilities
References
Link Providers
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00030.html cve-icon cve-icon
http://packetstormsecurity.com/files/155754/Slackware-Security-Advisory-openssl-Updates.html cve-icon cve-icon
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=419102400a2811582a7a3d4a4e317d72e5ce0a8f cve-icon cve-icon
https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=f1c5eea8a817075d31e43f5876993c6710238c98 cve-icon cve-icon
https://github.com/openssl/openssl/pull/10575 cve-icon
https://lists.debian.org/debian-lts-announce/2022/03/msg00023.html cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/DDHOAATPWJCXRNFMJ2SASDBBNU5RJONY/ cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EXDDAOWSAIEFQNBHWYE6PPYFV4QXGMCD/ cve-icon cve-icon
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XVEP3LAK4JSPRXFO4QF4GG2IVXADV3SO/ cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2019-1551 cve-icon
https://seclists.org/bugtraq/2019/Dec/39 cve-icon cve-icon
https://seclists.org/bugtraq/2019/Dec/46 cve-icon cve-icon
https://security.gentoo.org/glsa/202004-10 cve-icon cve-icon
https://security.netapp.com/advisory/ntap-20191210-0001/ cve-icon cve-icon
https://usn.ubuntu.com/4376-1/ cve-icon cve-icon
https://usn.ubuntu.com/4504-1/ cve-icon cve-icon
https://www.cve.org/CVERecord?id=CVE-2019-1551 cve-icon
https://www.debian.org/security/2019/dsa-4594 cve-icon cve-icon
https://www.debian.org/security/2021/dsa-4855 cve-icon cve-icon
https://www.openssl.org/news/secadv/20191206.txt cve-icon cve-icon cve-icon
https://www.oracle.com/security-alerts/cpuApr2021.html cve-icon cve-icon
https://www.oracle.com/security-alerts/cpujan2021.html cve-icon cve-icon
https://www.oracle.com/security-alerts/cpujul2020.html cve-icon cve-icon
https://www.tenable.com/security/tns-2019-09 cve-icon cve-icon
https://www.tenable.com/security/tns-2020-03 cve-icon cve-icon
https://www.tenable.com/security/tns-2020-11 cve-icon cve-icon
https://www.tenable.com/security/tns-2021-10 cve-icon cve-icon
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}