CVE-2017-5195 : What You Need to Know

Irssi versions 0.8.17 through 0.8.21 contain a vulnerability that allows attackers to launch a denial of service attack through a specially crafted ANSI x8 color code, leading to an out-of-bounds read and subsequent crash.

Understanding CVE-2017-5195

This CVE entry describes a specific vulnerability present in Irssi versions 0.8.17 through 0.8.21.

What is CVE-2017-5195?

The CVE-2017-5195 vulnerability in Irssi versions 0.8.17 through 0.8.21 enables attackers to trigger a denial of service attack by utilizing a specifically crafted ANSI x8 color code, resulting in an out-of-bounds read and subsequent crash.

The Impact of CVE-2017-5195

This vulnerability can be exploited by remote attackers to cause a denial of service, potentially disrupting the availability of affected systems.

Technical Details of CVE-2017-5195

Irssi versions 0.8.17 through 0.8.21 are affected by this vulnerability.

Vulnerability Description

The vulnerability allows remote attackers to trigger a denial of service by exploiting a crafted ANSI x8 color code, leading to an out-of-bounds read and system crash.

Affected Systems and Versions

Irssi versions 0.8.17 through 0.8.21

Exploitation Mechanism

Attackers can exploit this vulnerability by sending specially crafted ANSI x8 color codes to the target system, causing an out-of-bounds read and subsequent crash.

Mitigation and Prevention

It is crucial to take immediate steps to mitigate the impact of CVE-2017-5195.

Immediate Steps to Take

Update Irssi to a non-vulnerable version if available.
Implement network-level protections to filter out malicious ANSI x8 color codes.

Long-Term Security Practices

Regularly update software and systems to patch known vulnerabilities.
Conduct security assessments and audits to identify and address potential weaknesses.

Patching and Updates

Stay informed about security advisories and patches released by Irssi.
Apply patches promptly to ensure systems are protected against known vulnerabilities.