Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
None
Attack Vector
Network
0

CVE-2017-3732

Disclosure Date: January 26, 2017 •
CVE-2017-3732 CVSS v3 Base Score: 5.9
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

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.

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CVSS V3 Severity and Metrics
Base Score:
5.9 Medium
Impact Score:
3.6
Exploitability Score:
2.2
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector (AV):
Network
Attack Complexity (AC):
High
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
High
Integrity (I):
None
Availability (A):
None

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
OpenSSL openssl-1.1.0
OpenSSL openssl-1.1.0a
OpenSSL openssl-1.1.0b
OpenSSL openssl-1.1.0c
OpenSSL openssl-1.0.2
OpenSSL openssl-1.0.2a
OpenSSL openssl-1.0.2b
OpenSSL openssl-1.0.2c
OpenSSL openssl-1.0.2d
OpenSSL openssl-1.0.2e
OpenSSL openssl-1.0.2f
OpenSSL openssl-1.0.2g
OpenSSL openssl-1.0.2h
OpenSSL openssl-1.0.2i
OpenSSL openssl-1.0.2j
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • nodejs,
  • openssl

Products

  • node.js,
  • openssl 1.0.2,
  • openssl 1.0.2a,
  • openssl 1.0.2b,
  • openssl 1.0.2c,
  • openssl 1.0.2d,
  • openssl 1.0.2e,
  • openssl 1.0.2f,
  • openssl 1.0.2h,
  • openssl 1.0.2i,
  • openssl 1.1.0a,
  • openssl 1.1.0b,
  • openssl 1.1.0c
Technical Analysis