MSRC_CVE-2017-3736

Vulnerability from csaf_microsoft - Published: 2017-11-02 00:00 - Updated: 2026-05-31 01:02
Summary
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.
Notes
Additional Resources: To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
Disclaimer: The information provided in the Microsoft Knowledge Base is provided \"as is\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
CVE-2017-3736
CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Affected products
Product Identifier Version Remediation
Unresolved product id: 17084-15 —
None Available
Unresolved product id: 17086-11 —
None Available
Unresolved product id: 17086-10 —
None Available
Unresolved product id: 17084-9 —
None Available
Unresolved product id: 17084-18 —
None Available
Unresolved product id: 17084-2 —
None Available
Unresolved product id: 17084-4 —
None Available
Unresolved product id: 17086-12 —
None Available
Unresolved product id: 17084-13 —
None Available
Unresolved product id: 17084-14 —
None Available
Unresolved product id: 17084-20 —
None Available
Unresolved product id: 17084-16 —
None Available
Product Identifier Version Remediation
Unresolved product id: 17086-22 —
Unresolved product id: 17084-8 —
Unresolved product id: 17084-6 —
Unresolved product id: 17084-3 —
Unresolved product id: 17086-21 —
Unresolved product id: 17086-17 —
Unresolved product id: 17086-19 —
Unresolved product id: 17084-5 —
Unresolved product id: 17084-7 —
Product Identifier Version Remediation
Unresolved product id: 17084-1 —
References
To clipboard 

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        "summary": "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 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. - VEX",
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          "url": "https://msrc.microsoft.com/csaf/vex/2017/msrc_cve-2017-3736.json"
        }
      ],
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        {
          "category": "none_available",
          "date": "2026-04-27T01:04:11.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17084-15"
          ]
        },
        {
          "category": "none_available",
          "date": "2026-04-27T01:04:11.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17086-11"
          ]
        },
        {
          "category": "none_available",
          "date": "2026-04-27T01:04:11.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17086-10"
          ]
        },
        {
          "category": "none_available",
          "date": "2026-04-27T01:04:11.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17084-9"
          ]
        },
        {
          "category": "none_available",
          "date": "2026-04-27T01:04:11.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17084-18"
          ]
        },
        {
          "category": "none_available",
          "date": "2026-04-27T01:04:11.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17084-2"
          ]
        },
        {
          "category": "none_available",
          "date": "2026-04-27T01:04:11.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17084-4"
          ]
        },
        {
          "category": "none_available",
          "date": "2026-04-27T01:04:11.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17086-12"
          ]
        },
        {
          "category": "none_available",
          "date": "2026-04-27T01:04:11.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17084-13"
          ]
        },
        {
          "category": "none_available",
          "date": "2026-04-27T01:04:11.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17084-14"
          ]
        },
        {
          "category": "none_available",
          "date": "2026-04-27T01:04:11.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17084-20"
          ]
        },
        {
          "category": "none_available",
          "date": "2026-04-27T01:04:11.000Z",
          "details": "There is no fix available for this vulnerability as of now",
          "product_ids": [
            "17084-16"
          ]
        }
      ],
      "title": "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."
    }
  ]
}


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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.