Current Description
Versions 1.17 and 1.18 of the Python urllib3 library suffer from a vulnerability that can cause them, in certain configurations, to not correctly validate TLS certificates. This places users of the library with those configurations at risk of man-in-the-middle and information leakage attacks. This vulnerability affects users using versions 1.17 and 1.18 of the urllib3 library, who are using the optional PyOpenSSL support for TLS instead of the regular standard library TLS backend, and who are using OpenSSL 1.1.0 via PyOpenSSL. This is an extremely uncommon configuration, so the security impact of this vulnerability is low.
Source:
MITRE
Description Last Modified:
01/11/2017
View Analysis Description
Analysis Description
Versions 1.17 and 1.18 of the Python urllib3 library suffer from a vulnerability that can cause them, in certain configurations, to not correctly validate TLS certificates. This places users of the library with those configurations at risk of man-in-the-middle and information leakage attacks. This vulnerability affects users using versions 1.17 and 1.18 of the urllib3 library, who are using the optional PyOpenSSL support for TLS instead of the regular standard library TLS backend, and who are using OpenSSL 1.1.0 via PyOpenSSL. This is an extremely uncommon configuration, so the security impact of this vulnerability is low.
Source:
MITRE
Description Last Modified:
01/11/2017
Impact
CVSS v3.0 Severity and Metrics:
Base Score:
3.7 LOW
Vector:
AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
(V3 legend)
Impact Score:
1.4
Exploitability Score:
2.2
Attack Vector (AV):
Network
Attack Complexity (AC):
High
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
Low
Integrity (I):
None
Availability (A):
None
CVSS v2.0 Severity and Metrics:
Base Score:
2.6 LOW
Vector:
(AV:N/AC:H/Au:N/C:P/I:N/A:N)
(V2 legend)
Impact Subscore:
2.9
Exploitability Subscore:
4.9
Access Vector (AV):
Network
Access Complexity (AC):
High
Authentication (AU):
None
Confidentiality (C):
Partial
Integrity (I):
None
Availability (A):
None
Additional Information:
Allows unauthorized disclosure of information
References to Advisories, Solutions, and Tools
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Technical Details
Vulnerability Type
(View All)
- Improper Certificate Validation (CWE-295)
Change History
1 change record found
- show changes
Initial Analysis -
1/13/2017 8:09:19 AM
| Action |
Type |
Old Value |
New Value |
| Added |
CPE Configuration |
|
OR
*cpe:2.3:a:python:urllib3:1.17:*:*:*:*:*:*:*
*cpe:2.3:a:python:urllib3:1.18:*:*:*:*:*:*:* |
| Added |
CVSS V2 |
|
(AV:N/AC:H/Au:N/C:P/I:N/A:N) |
| Added |
CVSS V3 |
|
AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N |
| Added |
CWE |
|
CWE-295 |
| Changed |
Reference Type |
http://www.openwall.com/lists/oss-security/2016/10/27/6 No Types Assigned |
http://www.openwall.com/lists/oss-security/2016/10/27/6 Mitigation, Mailing List |
| Changed |
Reference Type |
http://www.securityfocus.com/bid/93941 No Types Assigned |
http://www.securityfocus.com/bid/93941 Third Party Advisory, VDB Entry |