CVE-2017-7705 : What You Need to Know

Wireshark versions 2.2.0 to 2.2.5 and 2.0.0 to 2.0.11 were vulnerable to an issue in the RPC over RDMA dissector that could lead to an infinite loop. This vulnerability could be exploited by injecting packets or using malformed capture files. The problem was addressed by implementing proper checks in the affected file.

Understanding CVE-2017-7705

This CVE entry pertains to a specific vulnerability in Wireshark versions 2.2.0 to 2.2.5 and 2.0.0 to 2.0.11 related to the RPC over RDMA dissector.

What is CVE-2017-7705?

CVE-2017-7705 is a vulnerability in Wireshark versions 2.2.0 to 2.2.5 and 2.0.0 to 2.0.11 that could cause the RPC over RDMA dissector to enter an infinite loop when triggered by packet injection or malformed capture files.

The Impact of CVE-2017-7705

The vulnerability could potentially lead to a denial of service (DoS) condition due to the software entering an infinite loop, consuming excessive resources and impacting system performance.

Technical Details of CVE-2017-7705

This section provides more in-depth technical details about the vulnerability.

Vulnerability Description

The RPC over RDMA dissector in Wireshark versions 2.2.0 to 2.2.5 and 2.0.0 to 2.0.11 could go into an infinite loop, triggered by packet injection or malformed capture files. The issue was resolved by adding proper checks in the affected file.

Affected Systems and Versions

Wireshark versions 2.2.0 to 2.2.5
Wireshark versions 2.0.0 to 2.0.11

Exploitation Mechanism

The vulnerability could be exploited by injecting packets or utilizing capture files with invalid formatting, causing the software to exceed the maximum offset and enter an infinite loop.

Mitigation and Prevention

To address CVE-2017-7705 and enhance system security, the following steps are recommended:

Immediate Steps to Take

Update Wireshark to the latest patched version.
Avoid injecting packets from untrusted sources.
Exercise caution when using capture files of unknown origin.

Long-Term Security Practices

Regularly update and patch software to mitigate known vulnerabilities.
Implement network segmentation to limit the impact of potential attacks.
Conduct security audits and penetration testing to identify and address vulnerabilities.

Patching and Updates

Ensure that Wireshark is regularly updated to the latest version to apply patches and security fixes.