CVE-2021-39925 : What You Need to Know
Understand the impact of CVE-2021-39925, a buffer overflow vulnerability in Wireshark versions 3.2.0 to 3.2.17 and 3.4.0 to 3.4.9 allowing denial of service attacks.
This CVE record pertains to a buffer overflow vulnerability in the Wireshark software version 3.4.0 to 3.4.9 and 3.2.0 to 3.2.17, allowing denial of service through packet injection or crafted capture files.
Understanding CVE-2021-39925
The vulnerability identified as CVE-2021-39925 affects the Wireshark software by allowing attackers to conduct denial of service attacks.
What is CVE-2021-39925?
CVE-2021-39925 is a buffer overflow security flaw found in Wireshark versions 3.2.0 to 3.2.17 and 3.4.0 to 3.4.9 allowing for denial of service attacks via specific crafted data.
The Impact of CVE-2021-39925
The vulnerability could be exploited by an attacker to disrupt services and potentially cause the software to crash, impacting system availability.
Technical Details of CVE-2021-39925
This section provides more technical insights into the CVE.
Vulnerability Description
The flaw involves a buffer overflow in the Bluetooth SDP dissector in Wireshark versions 3.4.0 to 3.4.9 and 3.2.0 to 3.2.17, enabling denial of service attacks by injecting malicious packets or using manipulated capture files.
Affected Systems and Versions
- Affected Vendor: Wireshark Foundation
- Affected Product: Wireshark
- Vulnerable Versions:
- Version >=3.4.0 and <3.4.10
- Version >=3.2.0 and <3.2.18
Exploitation Mechanism
The vulnerability can be exploited remotely by sending crafted data packets to the target system, triggering a buffer overflow and potentially causing a denial of service situation.
Mitigation and Prevention
Steps to address and prevent the exploitation of the CVE.
Immediate Steps to Take
- Update: Apply the latest security patches provided by Wireshark to mitigate the vulnerability.
- Monitor: Keep an eye on security advisories and promptly apply relevant updates.
Long-Term Security Practices
- Regular Scans: Conduct regular vulnerability scans to detect and address security issues.
- Network Segmentation: Implement network segmentation to limit the impact of potential attacks.
Patching and Updates
- Vendor Patches: Stay updated with Wireshark's security advisories and apply patches as soon as they are released to ensure system security.