CVE-2019-19703 : Security Advisory and Response

Ktor through version 1.2.6 allows the client to resend data from the HTTP Authorization header to a redirect location.

Understanding CVE-2019-19703

This CVE involves a vulnerability in Ktor that enables the client to retransmit data from the HTTP Authorization header to a specified redirect location.

What is CVE-2019-19703?

In Ktor up to version 1.2.6, the client can resend data found in the HTTP Authorization header to a specific redirect location, potentially leading to unauthorized access or information disclosure.

The Impact of CVE-2019-19703

This vulnerability could be exploited by malicious actors to intercept sensitive data transmitted via the HTTP Authorization header, compromising the security and confidentiality of the application.

Technical Details of CVE-2019-19703

Ktor's vulnerability allows for the retransmission of sensitive data, posing a risk to the confidentiality and integrity of the application.

Vulnerability Description

The client in Ktor, up to version 1.2.6, retransmits data found in the HTTP Authorization header to a specified redirect location.

Affected Systems and Versions

Product: N/A
Vendor: N/A
Versions affected: Up to version 1.2.6

Exploitation Mechanism

The vulnerability enables attackers to intercept and misuse data from the HTTP Authorization header, potentially leading to unauthorized access or data leakage.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent exploitation of this vulnerability.

Immediate Steps to Take

Upgrade Ktor to a version beyond 1.2.6 to mitigate the vulnerability.
Monitor network traffic for any suspicious activity related to unauthorized data transmission.

Long-Term Security Practices

Implement secure coding practices to prevent similar vulnerabilities in the future.
Regularly update and patch software to address known security issues.
Conduct security assessments and audits to identify and remediate potential vulnerabilities.
Educate developers and users on secure data handling practices.

Patching and Updates

Ensure that Ktor is regularly updated to the latest version to apply patches and security fixes that address vulnerabilities like CVE-2019-19703.