CVE-2017-8073 : Security Advisory and Response

WeeChat before version 1.7.1 has a vulnerability that allows remote exploitation through a buffer overflow triggered when sending a filename via DCC to the IRC plugin.

Understanding CVE-2017-8073

WeeChat version 1.7.1 and earlier are susceptible to a remote crash due to a buffer overflow vulnerability.

What is CVE-2017-8073?

WeeChat prior to version 1.7.1 is vulnerable to remote exploitation when a filename is sent through DCC to the IRC plugin, leading to a buffer overflow in the irc_ctcp_dcc_filename_without_quotes function.

The Impact of CVE-2017-8073

This vulnerability allows remote attackers to crash the application by exploiting the buffer overflow during the removal of quotes in the mentioned function.

Technical Details of CVE-2017-8073

WeeChat version 1.7.1 and earlier are affected by this vulnerability.

Vulnerability Description

The vulnerability in WeeChat allows a remote crash by sending a filename via DCC to the IRC plugin, causing a buffer overflow during quote removal.

Affected Systems and Versions

WeeChat versions prior to 1.7.1

Exploitation Mechanism

Attackers can exploit this vulnerability remotely by sending a specially crafted filename through DCC to the IRC plugin, triggering a buffer overflow.

Mitigation and Prevention

It is crucial to take immediate steps to address and prevent the exploitation of CVE-2017-8073.

Immediate Steps to Take

Update WeeChat to version 1.7.1 or later to mitigate the vulnerability.
Monitor security advisories and apply patches promptly.

Long-Term Security Practices

Regularly update software and apply security patches.
Implement network security measures to prevent remote exploitation.

Patching and Updates

Ensure timely installation of software updates and security patches to protect against known vulnerabilities.