Detections
Analytics
CVE-2017-3732
medium
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.
References
https://www.tenable.com/security/tns-2017-04
https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
https://www.openssl.org/news/secadv/20170126.txt
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03838en_us
https://security.gentoo.org/glsa/201702-07
https://security.FreeBSD.org/advisories/FreeBSD-SA-17:02.openssl.asc
https://github.com/openssl/openssl/commit/a59b90bf491410f1f2bc4540cc21f1980fd14c5b
https://access.redhat.com/errata/RHSA-2018:2713
https://access.redhat.com/errata/RHSA-2018:2575
https://access.redhat.com/errata/RHSA-2018:2568
https://access.redhat.com/errata/RHSA-2018:2187
https://access.redhat.com/errata/RHSA-2018:2186
https://access.redhat.com/errata/RHSA-2018:2185
http://www.securitytracker.com/id/1037717
http://www.securityfocus.com/bid/95814
http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.html
http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.html
http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html