CVE-2019-7715 : What You Need to Know

A vulnerability has been identified in the TELNET server of the Interpeak IPCOMShell, running on Green Hills INTEGRITY RTOS 5.0.4. The issue allows for the creation of a user-controlled format string during login, potentially exposing memory addresses.

Understanding CVE-2019-7715

This CVE pertains to a vulnerability in the TELNET server of Interpeak IPCOMShell on Green Hills INTEGRITY RTOS 5.0.4.

What is CVE-2019-7715?

This vulnerability arises from the handling of the main shell in the TELNET server, utilizing the value stored in the environment variable ipcom.shell.greeting as the initial argument for the printf() function. Manipulating this variable through the sysvar command enables the creation of a user-controlled format string during login, leading to memory address exposure.

The Impact of CVE-2019-7715

The exploitation of this vulnerability could result in the exposure of sensitive memory addresses, potentially aiding attackers in further compromising the system.

Technical Details of CVE-2019-7715

This section provides technical insights into the vulnerability.

Vulnerability Description

The vulnerability allows for the creation of a user-controlled format string during login, which can expose memory addresses.

Affected Systems and Versions

Green Hills INTEGRITY RTOS 5.0.4

Exploitation Mechanism

Attackers can modify the environment variable ipcom.shell.greeting using the sysvar command to create a user-controlled format string during login.

Mitigation and Prevention

Protective measures to address CVE-2019-7715.

Immediate Steps to Take

Apply vendor-supplied patches or updates promptly.
Monitor system logs for any unusual login activities.
Restrict network access to vulnerable systems.

Long-Term Security Practices

Regularly update and patch all software and firmware components.
Implement network segmentation to limit the impact of potential breaches.
Conduct regular security audits and assessments.

Patching and Updates

Green Hills INTEGRITY RTOS users should apply patches provided by the vendor to mitigate the vulnerability.