CVE-2019-1551

 

Published at: - 06-12-2019 07:15

Last modified: - 19-04-2022 05:36

Total changes: - 10

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).

Common Vulnerability Scoring System (CVSS)

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

 

Verification logic

 

Reference

• https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=419102400a2811582a7a3d4a4e317d72e5ce0a8f
• https://www.openssl.org/news/secadv/20191206.txt
• https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=f1c5eea8a817075d31e43f5876993c6710238c98
• https://security.netapp.com/advisory/ntap-20191210-0001/
• 20191225 [slackware-security] openssl (SSA:2019-354-01)-Mailing List, Third Party Advisory
• http://packetstormsecurity.com/files/155754/Slackware-Security-Advisory-openssl-Updates.html
• DSA-4594-Third Party Advisory
• 20191229 [SECURITY] [DSA 4594-1] openssl1.0 security update-Mailing List, Third Party Advisory
• https://www.tenable.com/security/tns-2019-09
• openSUSE-SU-2020:0062-Mailing List, Third Party Advisory
• GLSA-202004-10-Third Party Advisory
• FEDORA-2020-fcc91a28e8-Mailing List, Third Party Advisory
• https://www.tenable.com/security/tns-2020-03
• FEDORA-2020-da2d1ef2d7-Mailing List, Third Party Advisory
• FEDORA-2020-d7b29838f6-Mailing List, Third Party Advisory
• USN-4376-1-Third Party Advisory
• https://www.oracle.com/security-alerts/cpujul2020.html
• USN-4504-1-Third Party Advisory
• https://www.tenable.com/security/tns-2020-11
• https://www.oracle.com/security-alerts/cpujan2021.html
• DSA-4855-Third Party Advisory
• https://www.tenable.com/security/tns-2021-10
• https://www.oracle.com/security-alerts/cpuApr2021.html
• [debian-lts-announce] 20220317 [SECURITY] [DLA 2952-1] openssl security update-Mailing List, Third Party Advisory

 

Keywords

NVD

 

CVE-2019-1551

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures