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CVE-2017-3732

CVE information

Published

5 years ago

Last Modified

3 years ago

CVSSv2.0 Severity

Medium

CVSSv3.1 Severity

Medium

Impact Analysis

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..

CVSSv2.0 Score

Severity
Medium
Base Score
4.3/10
Exploit Score
8.6/10
Access Vector
Network
Access Complexity
Medium
Authentication Required
None
Impact Score
2.9/10
Confidentiality Impact
Partial
Availability Impact
None
Integrity Impact
None

CVSSv3.1 Score

Severity
Medium
Base Score
5.9/10
Exploit Score
2.2/10
Access Vector
Network
Access Complexity
High
Privileges Required
None
Impact Score
3.6/10
Confidentiality Impact
High
Availability Impact
None
Integrity Impact
None
Scope
Unchanged
User Interaction
None

Products Affected

CPE Affected Vulnerable Excluding Edit
cpe:2.3:a:openssl:openssl:1.0.2a:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:a:openssl:openssl:1.0.2e:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:a:openssl:openssl:1.0.2b:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:a:openssl:openssl:1.1.0c:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:a:openssl:openssl:1.0.2h:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:a:openssl:openssl:1.0.2c:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:a:openssl:openssl:1.1.0b:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:a:openssl:openssl:1.0.2:beta3:*:*:*:*:*:*
  Yes
- -
cpe:2.3:a:openssl:openssl:1.0.2:beta1:*:*:*:*:*:*
  Yes
- -
cpe:2.3:a:openssl:openssl:1.0.2:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:a:openssl:openssl:1.0.2d:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:a:openssl:openssl:1.1.0a:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:a:openssl:openssl:1.0.2:beta2:*:*:*:*:*:*
  Yes
- -
cpe:2.3:a:openssl:openssl:1.0.2f:*:*:*:*:*:*:*
  Yes
- -
cpe:2.3:a:openssl:openssl:1.0.2i:*:*:*:*:*:*:*
  Yes
- -