cURL/libcURL up to 7.49.0 on Windows DLL Loader LoadLibraryEx access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.5$0-$5k0.00

Summaryinfo

A vulnerability has been found in cURL and libcURL up to 7.49.0 on Windows and classified as problematic. Affected is the function LoadLibraryEx of the component DLL Loader. The manipulation leads to access control. This vulnerability is listed as CVE-2016-4802. The attack may be initiated remotely. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in cURL and libcURL up to 7.49.0 on Windows (Network Utility Software). It has been rated as critical. This issue affects the function LoadLibraryEx of the component DLL Loader. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability.

The weakness was presented 05/30/2016 with Huawei as Windows DLL hijacking as confirmed advisory (Website). The advisory is shared at curl.haxx.se. The public release was coordinated in cooperation with the project team. The identification of this vulnerability is CVE-2016-4802 since 05/13/2016. The exploitation is known to be easy. An attack has to be approached locally. A simple authentication is necessary for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 23 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 92558 (Tenable SecurityCenter < 5.4.0 Multiple Vulnerabilities (TNS-2016-12)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc. and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 43619 (Juniper Junos OS Multiple vulnerabilities in cURL versions (JSA10874)).

Upgrading to version 7.49.1 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (92558), SecurityFocus (BID 90997†) and SecurityTracker (ID 1036008†). See VDB-8439, VDB-9262, VDB-10906 and VDB-11245 for similar entries. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.5

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

NVD Base Score: 7.8
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: Access control
CWE: CWE-264
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 92558
Nessus Name: Tenable SecurityCenter < 5.4.0 Multiple Vulnerabilities (TNS-2016-12)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

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 7.49.1

Timelineinfo

05/07/2016 🔍
05/13/2016 +6 days 🔍
05/30/2016 +17 days 🔍
05/30/2016 +0 days 🔍
06/01/2016 +2 days 🔍
06/01/2016 +0 days 🔍
06/02/2016 +1 days 🔍
06/24/2016 +22 days 🔍
07/26/2016 +32 days 🔍
08/22/2022 +2218 days 🔍

Sourcesinfo

Advisory: Windows DLL hijacking
Organization: Huawei
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2016-4802 (🔍)
GCVE (CVE): GCVE-0-2016-4802
GCVE (VulDB): GCVE-100-87713
SecurityFocus: 90997 - cURL CVE-2016-4802 DLL Loading Local Code Execution Vulnerability
SecurityTracker: 1036008

See also: 🔍

Entryinfo

Created: 06/02/2016 14:16
Updated: 08/22/2022 18:12
Changes: 06/02/2016 14:16 (73), 12/28/2018 10:51 (13), 08/22/2022 18:12 (4)
Complete: 🔍
Cache ID: 216::103

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

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