CVE-2017-18187 : Vulnerability Insights and Analysis

An integer overflow in the ssl_parse_client_psk_identity() function in ARM mbed TLS before version 2.7.0 can lead to a bypass of bounds-check during PSK identity parsing.

Understanding CVE-2017-18187

This CVE involves an integer overflow vulnerability in ARM mbed TLS that can result in a security bypass.

What is CVE-2017-18187?

This vulnerability occurs in the ssl_parse_client_psk_identity() function within ARM mbed TLS, allowing attackers to bypass bounds-check during PSK identity parsing.

The Impact of CVE-2017-18187

The vulnerability could be exploited by malicious actors to potentially execute arbitrary code or cause a denial of service (DoS) condition.

Technical Details of CVE-2017-18187

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The integer overflow in the ssl_parse_client_psk_identity() function in ARM mbed TLS before version 2.7.0 allows for a bounds-check bypass during PSK identity parsing.

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: All versions before 2.7.0

Exploitation Mechanism

Attackers can exploit this vulnerability to bypass bounds-check during PSK identity parsing, potentially leading to unauthorized access or DoS attacks.

Mitigation and Prevention

Protecting systems from CVE-2017-18187 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update ARM mbed TLS to version 2.7.0 or later to mitigate the vulnerability.
Monitor network traffic for any signs of exploitation.

Long-Term Security Practices

Regularly update software and firmware to patch known vulnerabilities.
Implement network segmentation and access controls to limit the impact of potential attacks.
Conduct regular security assessments and penetration testing to identify and address security weaknesses.

Patching and Updates

Ensure timely installation of security patches and updates provided by ARM mbed TLS to address CVE-2017-18187.