CVE-2017-3735 : What You Need to Know

CVE-2017-3735 is a vulnerability in OpenSSL that affects the parsing process of an IPAddressFamily extension within an X.509 certificate. This flaw may result in a one-byte overread, potentially leading to an inaccurate rendering of the certificate's text display.

Understanding CVE-2017-3735

This vulnerability has been present in OpenSSL since 2006 and impacts all versions released before 1.0.2m and 1.1.0g.

What is CVE-2017-3735?

The vulnerability in the parsing process of an IPAddressFamily extension within an X.509 certificate in OpenSSL may cause a one-byte overread, resulting in incorrect rendering of the certificate's text display.

The Impact of CVE-2017-3735

The vulnerability could potentially lead to inaccurate rendering of certificate text display, affecting the integrity and reliability of the certificate.

Technical Details of CVE-2017-3735

CVE-2017-3735 involves the following technical aspects:

Vulnerability Description

The flaw allows for a one-byte overread during the parsing process of an IPAddressFamily extension within an X.509 certificate.

Affected Systems and Versions

Vendor: OpenSSL Software Foundation
Product: OpenSSL
Affected Versions:
OpenSSL 1.1.0
OpenSSL 1.0.2

Exploitation Mechanism

The vulnerability can be exploited by manipulating the IPAddressFamily extension within an X.509 certificate to trigger the one-byte overread.

Mitigation and Prevention

To address CVE-2017-3735, consider the following mitigation strategies:

Immediate Steps to Take

Update OpenSSL to version 1.0.2m or 1.1.0g, which contain fixes for this vulnerability.
Monitor vendor advisories and apply patches promptly.

Long-Term Security Practices

Regularly update OpenSSL and other software components to mitigate known vulnerabilities.
Conduct security assessments and audits to identify and address potential weaknesses.

Patching and Updates

Apply security patches provided by OpenSSL promptly to address CVE-2017-3735 and other vulnerabilities.