CVE-2024-11596 is a buffer over-read vulnerability classified under CWE-126 affecting the ECMP (Equal-Cost Multi-Path) dissector component in Wireshark versions 4.2.0 through 4.2.8 and 4.4.0 through 4.4.1. The vulnerability arises when Wireshark processes malformed packets or capture files that exploit improper bounds checking in the ECMP dissector, causing the application to read beyond allocated memory buffers. This can result in application crashes, leading to denial of service conditions. The vulnerability has a CVSS 3.1 base score of 7.8, indicating high severity, with an attack vector of local (AV:L), low attack complexity (AC:L), no privileges required (PR:N), but requiring user interaction (UI:R). The scope is unchanged (S:U), and impacts confidentiality, integrity, and availability (C:H/I:H/A:H), meaning an attacker could potentially cause memory disclosure, data corruption, or crash the application. Exploitation involves either injecting crafted packets into a network monitored by Wireshark or convincing a user to open a malicious capture file. Although no public exploits are known, the vulnerability poses a significant risk to environments where Wireshark is used for network troubleshooting, forensic analysis, or security monitoring. The lack of available patches at the time of disclosure necessitates immediate attention to mitigation strategies.

The vulnerability can lead to denial of service by crashing Wireshark, disrupting network analysis and monitoring activities critical for security operations and troubleshooting. The buffer over-read may also expose sensitive memory contents, risking confidentiality breaches. Integrity could be compromised if malformed packets cause incorrect parsing or data corruption in analysis results. Organizations relying heavily on Wireshark for incident response or network diagnostics may face operational delays and increased risk of undetected network threats. Since exploitation requires user interaction or crafted network traffic, targeted attacks against security teams or network administrators are plausible. The broad use of Wireshark across industries means the impact spans multiple sectors, potentially affecting incident response capabilities and network visibility globally.

1. Upgrade Wireshark to a fixed version once patches are released by the Wireshark Foundation. 2. Until patches are available, avoid opening untrusted or suspicious capture files and restrict Wireshark usage to trusted environments. 3. Implement network segmentation and filtering to limit exposure to malicious packet injection, especially on networks where Wireshark is deployed. 4. Use sandboxing or containerization to isolate Wireshark processes, minimizing impact from crashes or memory exposure. 5. Educate users and administrators about the risks of opening unknown capture files and encourage verification of file sources. 6. Monitor network traffic for anomalous ECMP-related packets that could indicate exploitation attempts. 7. Employ endpoint protection solutions that can detect abnormal application crashes or memory access violations related to Wireshark.