CVE-2017-3732

 

Published at: - 04-05-2017 09:29

Last modified: - 29-08-2022 10:43

Total changes: - 2

Description

There is a carry propagating bug in the x86_64 Montgomery squaring procedure in OpenSSL 1.0.2 before 1.0.2k and 1.1.0 before 1.1.0d. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. For example this can occur by default in OpenSSL DHE based SSL/TLS ciphersuites. Note: This issue is very similar to CVE-2015-3193 but must be treated as a separate problem.

Common Vulnerability Scoring System (CVSS)

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

 

Verification logic

 

Reference

• https://www.openssl.org/news/secadv/20170126.txt
• 95814-Third Party Advisory, VDB Entry
• GLSA-201702-07-Third Party Advisory
• 1037717-Third Party Advisory, VDB Entry
• http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
• http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
• https://www.tenable.com/security/tns-2017-04
• FreeBSD-SA-17:02-Third Party Advisory
• http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
• https://github.com/openssl/openssl/commit/a59b90bf491410f1f2bc4540cc21f1980fd14c5b
• RHSA-2018:2187-Third Party Advisory
• RHSA-2018:2186-Third Party Advisory
• RHSA-2018:2185-Third Party Advisory
• https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03838en_us
• RHSA-2018:2568-Third Party Advisory
• RHSA-2018:2575-Third Party Advisory
• RHSA-2018:2713-Third Party Advisory
• https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html

 

Keywords

NVD

 

CVE-2017-3732

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures