CVE-2017-3736
There is a carry propagating bug in the x86_64 Montgomery squaring procedure in OpenSSL before 1.0.2m and 1.1.0 before 1.1.0g. No EC…
- 6.5MediumCVSS base score
- 10.1%Exploitation in 30 daysEPSS · top 4.3% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
There is a carry propagating bug in the x86_64 Montgomery squaring procedure in OpenSSL before 1.0.2m and 1.1.0 before 1.1.0g. 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. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen.
Timeline
ID reserved
By openssl
- 11 months later
· 11 months later
Published
- 7 years later
· 7 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium6.5 | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 10.1% · top 4.3% of all CVEs (9 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Affected products
OpenSSL Software Foundation · OpenSSL
- affected 1.1.0 - 1.1.0f
- affected 1.0.2 - 1.0.2l
References
27
- https://security.netapp.com/advisory/ntap-20171107-0002/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- RHSA-2018:2185 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://github.com/openssl/openssl/commit/4443cf7aa0099e5ce615c18cee249fff77fb0871 (opens in a new tab)x_refsource_MISCx_transferred
- RHSA-2018:2186 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- RHSA-2018:2713 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- DSA-4018 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- GLSA-201712-03 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- RHSA-2018:0998 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2018:2575 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://www.tenable.com/security/tns-2017-15 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- 101666 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- RHSA-2018:2568 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://www.openssl.org/news/secadv/20171102.txt (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html (opens in a new tab)x_refsource_CONFIRMx_transferred
- DSA-4017 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- https://www.tenable.com/security/tns-2017-14 (opens in a new tab)x_refsource_CONFIRMx_transferred
- FreeBSD-SA-17:11 (opens in a new tab)vendor-advisoryx_refsource_FREEBSDx_transferred
- 1039727 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbst03881en_us (opens in a new tab)x_refsource_CONFIRMx_transferred
- RHSA-2018:2187 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://security.netapp.com/advisory/ntap-20180117-0002/ (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2017-12853 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://cveledger.app/cve/CVE-2017-3736)Record last updated .