CVE-2019-3822

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in cURL ausnutzen, um Informationen offenzulegen oder einen Denial of Service Angriff durchzuführen.

Ein Angreifer kann mehrere Schwachstellen in Oracle Communications Applications ausnutzen, um dadurch die Integrität, Vertraulichkeit und Verfügbarkeit zu gefährden.

Ein Angreifer kann mehrere Schwachstellen in Dell Data Protection Advisor ausnutzen, um beliebigen Code auszuführen, einen Denial-of-Service-Zustand zu erzeugen, Sicherheitsmaßnahmen zu umgehen und nicht näher spezifizierte Angriffe zu starten.

Successful exploitation of these vulnerabilities could allow an attacker to circumvent the system authorization for certain functionalities, and to execute privileged functions.

As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens' operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals.

libcurl contains a stack based buffer overflow vulnerability. 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 large response data is extracted from a previous NTLMv2 header provided by the malicious or broken HTTP server. Such large response data 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.