CVE-2017-7468 : Security Advisory and Response

CVE-2017-7468 was published on July 16, 2018, affecting the 'curl' product. The vulnerability allowed libcurl to resume a TLS session even if the client certificate had changed, impacting versions 7.52.0 to 7.53.1.

Understanding CVE-2017-7468

This CVE entry highlights a security flaw in the curl and libcurl software versions 7.52.0 to 7.53.1, impacting the TLS session resumption process.

What is CVE-2017-7468?

In versions 7.52.0 to 7.53.1 of curl and libcurl, a vulnerability allowed libcurl to attempt to resume a TLS session even if the client certificate had been changed. This behavior contradicted server specifications, potentially leading to security issues.

The Impact of CVE-2017-7468

The vulnerability could result in a security lapse where libcurl would not properly handle changes in client certificates during TLS session resumptions, potentially exposing sensitive information.

Technical Details of CVE-2017-7468

This section delves into the technical aspects of the CVE entry.

Vulnerability Description

The flaw in libcurl allowed it to resume TLS sessions without considering changes in client certificates, contrary to server specifications.

Affected Systems and Versions

Product: curl
Vendor: [UNKNOWN]
Versions Affected: curl 7.52.0 to 7.53.1

Exploitation Mechanism

The vulnerability could be exploited by malicious actors to potentially intercept sensitive information during TLS session resumptions.

Mitigation and Prevention

Understanding how to mitigate and prevent the exploitation of this vulnerability is crucial.

Immediate Steps to Take

Update curl to a patched version that addresses the TLS session resumption issue.
Monitor for any unusual TLS session behaviors that could indicate exploitation.

Long-Term Security Practices

Regularly update software to ensure the latest security patches are applied.
Implement proper TLS configuration and certificate management practices.

Patching and Updates

Ensure that all systems running affected versions of curl are promptly patched with the latest updates to mitigate the vulnerability.