CVE-2017-3732
The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 15.4%, higher than 97% of all known CVEs. Patch or mitigate before the next change window.
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.
- CVSS 3.1
- 5.9 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 15.40% probability · 97th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-200
- Affected
- openssl/openssl · nodejs/node.js
- Source
- openssl-security@openssl.org
EPSS 15.4% since 27 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.htmlPatch, Third Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.htmlPatch, Third Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.htmlPatch, Third Party Advisory
- http://www.securityfocus.com/bid/95814Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037717Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:2185Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2186Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2187Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2568Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2575Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2713Third Party Advisory
- https://github.com/openssl/openssl/commit/a59b90bf491410f1f2bc4540cc21f1980fd14c5bPatch
- https://security.FreeBSD.org/advisories/FreeBSD-SA-17:02.openssl.ascThird Party Advisory
- https://security.gentoo.org/glsa/201702-07Third Party Advisory
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03838en_usThird Party Advisory
- https://www.openssl.org/news/secadv/20170126.txtVendor Advisory
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.htmlPatch, Third Party Advisory
- https://www.tenable.com/security/tns-2017-04Third Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.htmlPatch, Third Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpujul2017-3236622.htmlPatch, Third Party Advisory
- http://www.oracle.com/technetwork/security-advisory/cpuoct2017-3236626.htmlPatch, Third Party Advisory
- http://www.securityfocus.com/bid/95814Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1037717Third Party Advisory, VDB Entry
- https://access.redhat.com/errata/RHSA-2018:2185Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2186Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2187Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2568Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2575Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:2713Third Party Advisory
- https://github.com/openssl/openssl/commit/a59b90bf491410f1f2bc4540cc21f1980fd14c5bPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.