CVE-2019-5719 : Exploit Details and Defense Strategies
Learn about CVE-2019-5719, a vulnerability in Wireshark versions 2.6.0 to 2.6.5 and 2.4.0 to 2.4.11 that could lead to a crash. Find out how to mitigate the impact and prevent exploitation.
Wireshark versions 2.6.0 to 2.6.5 and 2.4.0 to 2.4.11 had a vulnerability in the ISAKMP dissector that could lead to a crash. The issue was addressed by modifying the packet-isakmp.c file.
Understanding CVE-2019-5719
This CVE entry pertains to a vulnerability in Wireshark versions 2.6.0 to 2.6.5 and 2.4.0 to 2.4.11 related to the ISAKMP dissector.
What is CVE-2019-5719?
The ISAKMP dissector in Wireshark versions 2.6.0 to 2.6.5 and 2.4.0 to 2.4.11 had a vulnerability that could cause a crash. This vulnerability was assigned CVE-2019-5719.
The Impact of CVE-2019-5719
The vulnerability in the ISAKMP dissector could potentially lead to a crash in affected versions of Wireshark, impacting the stability and functionality of the software.
Technical Details of CVE-2019-5719
This section provides technical details about the CVE-2019-5719 vulnerability.
Vulnerability Description
The ISAKMP dissector vulnerability in Wireshark versions 2.6.0 to 2.6.5 and 2.4.0 to 2.4.11 could result in a crash due to improper handling of a missing decryption data block. The issue was resolved by modifying the epan/dissectors/packet-isakmp.c file.
Affected Systems and Versions
- Wireshark versions 2.6.0 to 2.6.5
- Wireshark versions 2.4.0 to 2.4.11
Exploitation Mechanism
The vulnerability could be exploited by crafting a malicious ISAKMP packet to trigger the crash in the Wireshark ISAKMP dissector.
Mitigation and Prevention
Protecting systems from CVE-2019-5719 involves taking immediate steps and implementing long-term security practices.
Immediate Steps to Take
- Update Wireshark to the latest patched version that addresses CVE-2019-5719.
- Avoid opening suspicious ISAKMP packets in Wireshark until the software is patched.
Long-Term Security Practices
- Regularly update Wireshark and other software to mitigate potential vulnerabilities.
- Practice network segmentation to limit the impact of any successful exploitation.
Patching and Updates
Ensure that all systems running affected versions of Wireshark are promptly patched with the latest security updates.