Vulnerability Monitor

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CVE-2017-3732

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.

Published

2017-05-04T19:29:00.400

Last Modified

2025-04-20T01:37:25.860

Status

Deferred

Source

[email protected]

Severity

CVSSv3.1: 5.9 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:P/I:N/A:N

  • Access Vector: NETWORK
  • Access Complexity: MEDIUM
  • Authentication: NONE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: NONE
  • Availability Impact: NONE
Exploitability Score

8.6

Impact Score

2.9

Weaknesses
  • Type: Primary
    CWE-200
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application openssl openssl 1.0.2 Yes
Application openssl openssl 1.0.2 Yes
Application openssl openssl 1.0.2 Yes
Application openssl openssl 1.0.2 Yes
Application openssl openssl 1.0.2a Yes
Application openssl openssl 1.0.2b Yes
Application openssl openssl 1.0.2c Yes
Application openssl openssl 1.0.2d Yes
Application openssl openssl 1.0.2e Yes
Application openssl openssl 1.0.2f Yes
Application openssl openssl 1.0.2h Yes
Application openssl openssl 1.0.2i Yes
Application openssl openssl 1.1.0a Yes
Application openssl openssl 1.1.0b Yes
Application openssl openssl 1.1.0c Yes
Application nodejs node.js ≤ 4.1.2 Yes
Application nodejs node.js < 4.7.3 Yes
Application nodejs node.js ≤ 5.12.0 Yes
Application nodejs node.js ≤ 6.8.1 Yes
Application nodejs node.js < 6.9.5 Yes
Application nodejs node.js < 7.5.0 Yes
References