Openwsman process_connection() Remote Denial of Service Vulnerability [CVE-2019-3833]

CVE Number – CVE-2019-3833

A vulnerability in the process_connection() function of Openwsman could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on a targeted system.

The vulnerability is due to improper parsing of HTTP requests by the affected software. An attacker could exploit this vulnerability by sending an HTTP request that submits malicious input to the targeted system which could trigger an infinite loop in the process_connection() function of the affected software. A successful exploit allow the attacker to cause a DoS condition on the targeted system. 

Openwsman has not confirmed the vulnerability and software updates are not available.

Analysis

  • To exploit this vulnerability, an attacker must send a request that submits malicious input to the targeted system, making exploitation more difficult in environments that restrict network access from untrusted sources.

    At the time this alert was first published, a source code update patch has been made available; however, the patch has not been committed into the upstream source code repository.

Safeguards

  • Administrators are advised to contact the vendor regarding future updates and releases.

    Administrators are advised to allow only trusted users to have network access.

    Administrators are advised to run both firewall and antivirus applications to minimize the potential of inbound and outbound threats.

    Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.

    Administrators can help protect affected systems from external attacks by using a solid firewall strategy.

    Administrators are advised to monitor affected systems.

Vendor Announcements

  • At the time this alert was first published, Openwsman had not released a security announcement.

Fixed Software

  • At the time this alert was first published, Openwsman had not released software updates.

Duncan Newell

Duncan is a technology professional with over 20 years experience of working in various IT roles. He has a interest in cyber security, and has a wide range of other skills in radio, electronics and telecommunications.

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