Current Description
In curl and libcurl 7.52.0 to and including 7.53.1, libcurl would attempt to resume a TLS session even if the client certificate had changed. That is unacceptable since a server by specification is allowed to skip the client certificate check on resume, and may instead use the old identity which was established by the previous certificate (or no certificate). libcurl supports by default the use of TLS session id/ticket to resume previous TLS sessions to speed up subsequent TLS handshakes. They are used when for any reason an existing TLS connection couldn't be kept alive to make the next handshake faster. This flaw is a regression and identical to CVE-2016-5419 reported on August 3rd 2016, but affecting a different version range.
Source:
MITRE
Description Last Modified:
07/16/2018
View Analysis Description
Analysis Description
In curl and libcurl 7.52.0 to and including 7.53.1, libcurl would attempt to resume a TLS session even if the client certificate had changed. That is unacceptable since a server by specification is allowed to skip the client certificate check on resume, and may instead use the old identity which was established by the previous certificate (or no certificate). libcurl supports by default the use of TLS session id/ticket to resume previous TLS sessions to speed up subsequent TLS handshakes. They are used when for any reason an existing TLS connection couldn't be kept alive to make the next handshake faster. This flaw is a regression and identical to CVE-2016-5419 reported on August 3rd 2016, but affecting a different version range.
Source:
MITRE
Description Last Modified:
07/16/2018
Impact
CVSS v3.0 Severity and Metrics:
Base Score:
7.5 HIGH
Vector:
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
(V3 legend)
Impact Score:
3.6
Exploitability Score:
3.9
Attack Vector (AV):
Network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
None
Integrity (I):
High
Availability (A):
None
CVSS v2.0 Severity and Metrics:
Base Score:
5.0 MEDIUM
Vector:
(AV:N/AC:L/Au:N/C:N/I:P/A:N)
(V2 legend)
Impact Subscore:
2.9
Exploitability Subscore:
10.0
Access Vector (AV):
Network
Access Complexity (AC):
Low
Authentication (AU):
None
Confidentiality (C):
None
Integrity (I):
Partial
Availability (A):
None
Additional Information:
Allows unauthorized modification
References to Advisories, Solutions, and Tools
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Technical Details
Vulnerability Type
(View All)
- Improper Certificate Validation (CWE-295)
Change History
2 change records found
- show changes
Initial Analysis -
9/18/2018 2:19:13 PM
| Action |
Type |
Old Value |
New Value |
| Added |
CPE Configuration |
|
OR
*cpe:2.3:a:haxx:libcurl:*:*:*:*:*:*:*:* versions from (including) 7.52.0 up to (including) 7.53.1 |
| Added |
CVSS V2 |
|
(AV:N/AC:L/Au:N/C:N/I:P/A:N) |
| Added |
CVSS V3 |
|
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
| Added |
CWE |
|
CWE-295 |
| Changed |
Reference Type |
http://www.securityfocus.com/bid/97962 No Types Assigned |
http://www.securityfocus.com/bid/97962 Third Party Advisory, VDB Entry |
| Changed |
Reference Type |
http://www.securitytracker.com/id/1038341 No Types Assigned |
http://www.securitytracker.com/id/1038341 Third Party Advisory, VDB Entry |
| Changed |
Reference Type |
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7468 No Types Assigned |
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7468 Issue Tracking, Third Party Advisory |
| Changed |
Reference Type |
https://curl.haxx.se/docs/adv_20170419.html No Types Assigned |
https://curl.haxx.se/docs/adv_20170419.html Vendor Advisory |
| Changed |
Reference Type |
https://security.gentoo.org/glsa/201709-14 No Types Assigned |
https://security.gentoo.org/glsa/201709-14 Third Party Advisory |
CVE Modified by MITRE -
7/17/2018 9:29:00 PM
| Action |
Type |
Old Value |
New Value |
| Added |
Reference |
|
http://www.securityfocus.com/bid/97962 [No Types Assigned] |
| Added |
Reference |
|
http://www.securitytracker.com/id/1038341 [No Types Assigned] |
| Added |
Reference |
|
https://security.gentoo.org/glsa/201709-14 [No Types Assigned] |