cURL/libcURL up to 7.50.1 TLS Certificate lib/vtls/nss.c SelectClientCert improper authentication

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.17

Summaryinfo

A vulnerability was found in cURL and libcURL up to 7.50.1. It has been rated as critical. This affects the function SelectClientCert in the library lib/vtls/nss.c of the component TLS Certificate Handler. The manipulation leads to improper authentication. This vulnerability is referenced as CVE-2016-7141. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in cURL and libcURL up to 7.50.1 (Network Utility Software). It has been rated as critical. This issue affects the function SelectClientCert in the library lib/vtls/nss.c of the component TLS Certificate Handler. The manipulation with an unknown input leads to a improper authentication vulnerability. Using CWE to declare the problem leads to CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. Impacted is confidentiality, integrity, and availability.

The weakness was published 09/07/2016 as Incorrect reuse of client certificates as confirmed advisory (Website). The advisory is shared at curl.haxx.se. The identification of this vulnerability is CVE-2016-7141 since 09/05/2016. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 95917 (macOS 10.12.x < 10.12.2 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment. It is assigned to the family MacOS X Local Security Checks and running in the context c. The commercial vulnerability scanner Qualys is able to test this issue with plugin 176814 (Debian Security Update for curl (DLA 1568-1)).

Upgrading to version 7.50.2 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability. The vulnerability will be addressed with the following lines of code:

if(!strncmp(nickname, pem_slotname, sizeof(pem_slotname) - 1U)) {
  failf(data, "NSS: refusing previously loaded certificate from file: %s",
        nickname);
  return SECFailure;
}

The vulnerability is also documented in the databases at Tenable (95917), SecurityFocus (BID 92754†) and SecurityTracker (ID 1036739†). Similar entries are available at VDB-87463, VDB-90449, VDB-91659 and VDB-91680. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 95917
Nessus Name: macOS 10.12.x < 10.12.2 Multiple Vulnerabilities
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 14611
OpenVAS Name: Amazon Linux Local Check: alas-2016-742
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: cURL/libcURL 7.50.2
Patch: github.com

Timelineinfo

09/05/2016 🔍
09/06/2016 +1 days 🔍
09/07/2016 +1 days 🔍
09/07/2016 +0 days 🔍
09/07/2016 +0 days 🔍
09/08/2016 +1 days 🔍
10/03/2016 +25 days 🔍
12/16/2016 +74 days 🔍
09/15/2022 +2099 days 🔍

Sourcesinfo

Product: github.com

Advisory: Incorrect reuse of client certificates
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-7141 (🔍)
GCVE (CVE): GCVE-0-2016-7141
GCVE (VulDB): GCVE-100-91385
SecurityFocus: 92754 - cURL/libcURL CVE-2016-7141 Certificate Validation Security Bypass Vulnerability
SecurityTracker: 1036739

See also: 🔍

Entryinfo

Created: 09/08/2016 22:23
Updated: 09/15/2022 10:05
Changes: 09/08/2016 22:23 (62), 04/12/2019 09:14 (23), 09/15/2022 10:05 (5)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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