libcurl versions from 7.36.0 to before 7.64.0 are vulnerable to a stack-based buffer overflow. The function creating an outgoing NTLM type-3 header (`lib/vauth/ntlm.c:Curl_auth_create_ntlm_type3_message()`), generates the request HTTP header contents based on previously received data. The check that exists to prevent the local buffer from getting overflowed is implemented wrongly (using unsigned math) and as such it does not prevent the overflow from happening. This output data can grow larger than the local buffer if very large 'nt response' data is extracted from a previous NTLMv2 header provided by the malicious or broken HTTP server. Such a 'large value' needs to be around 1000 bytes or more. The actual payload data copied to the target buffer comes from the NTLMv2 type-2 response header.
This vulnerability carries a CRITICAL severity rating with a CVSS v3.1 score of 9.8, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), integrity (unauthorized modifications), and availability (service disruption) for affected systems. Impacting 16 products from haxx, from canonical, from debian and 13 others, organizations running these solutions should prioritize assessment and patching.
First disclosed in 2019, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.
2019-02-06T20:29:00.353
2024-11-21T04:42:36.923
Modified
CVSSv3.1: 9.8 (CRITICAL)
AV:N/AC:L/Au:N/C:P/I:P/A:P
10.0
6.4
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | haxx | libcurl | < 7.64.0 | Yes |
| Operating System | canonical | ubuntu_linux | 14.04 | Yes |
| Operating System | canonical | ubuntu_linux | 16.04 | Yes |
| Operating System | canonical | ubuntu_linux | 18.04 | Yes |
| Operating System | canonical | ubuntu_linux | 18.10 | Yes |
| Operating System | debian | debian_linux | 9.0 | Yes |
| Application | netapp | active_iq_unified_manager | ≥ 7.3 | Yes |
| Application | netapp | active_iq_unified_manager | ≥ 9.5 | Yes |
| Application | netapp | clustered_data_ontap | * | Yes |
| Application | netapp | oncommand_insight | - | Yes |
| Application | netapp | oncommand_workflow_automation | - | Yes |
| Application | netapp | snapcenter | - | Yes |
| Application | siemens | sinema_remote_connect_client | ≤ 2.0 | Yes |
| Application | oracle | communications_operations_monitor | 3.4 | Yes |
| Application | oracle | communications_operations_monitor | 4.0 | Yes |
| Application | oracle | enterprise_manager_ops_center | 12.3.3 | Yes |
| Application | oracle | enterprise_manager_ops_center | 12.4.0 | Yes |
| Application | oracle | http_server | 12.2.1.3.0 | Yes |
| Application | oracle | mysql_server | ≤ 5.7.26 | Yes |
| Application | oracle | mysql_server | ≤ 8.0.15 | Yes |
| Application | oracle | secure_global_desktop | 5.4 | Yes |
| Application | oracle | services_tools_bundle | 19.2 | Yes |
| Operating System | redhat | enterprise_linux | 8.0 | Yes |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For haxx's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.