CVE-2018-10839 : Exploit Details and Defense Strategies
Learn about CVE-2018-10839 affecting Qemu-kvm <= 3.0.0. Discover the impact, technical details, and mitigation steps for this NE2000 NIC emulation vulnerability.
Qemu-kvm <= 3.0.0 has a vulnerability related to integer overflow in NE2000 NIC emulation. Exploiting this flaw could lead to a denial-of-service (DoS) situation.
Understanding CVE-2018-10839
The NE2000 NIC emulation support in Qemu emulator versions up to 3.0.0 has a vulnerability related to integer overflow.
What is CVE-2018-10839?
The vulnerability in Qemu-kvm <= 3.0.0 could result in a buffer overflow issue when receiving network packets, allowing a user to crash the Qemu process from within the guest environment.
The Impact of CVE-2018-10839
- CVSS Base Score: 6.5 (Medium)
- Attack Vector: Network
- Attack Complexity: High
- Availability Impact: High
- Integrity Impact: Low
- Privileges Required: None
- Scope: Unchanged
- This vulnerability could be exploited to cause a denial-of-service (DoS) situation by crashing the Qemu process.
Technical Details of CVE-2018-10839
The technical details of the CVE-2018-10839 vulnerability in Qemu-kvm <= 3.0.0 are as follows:
Vulnerability Description
The vulnerability is related to an integer overflow issue in the NE2000 NIC emulation support, potentially leading to a buffer overflow when processing network packets.
Affected Systems and Versions
- Affected Product: Qemu-kvm
- Vendor: The QEMU Project
- Affected Versions: <= 3.0.0
Exploitation Mechanism
The flaw can be exploited by a user within the guest environment to crash the Qemu process, causing a denial-of-service (DoS) scenario.
Mitigation and Prevention
Steps to mitigate and prevent the CVE-2018-10839 vulnerability:
Immediate Steps to Take
- Update Qemu-kvm to a version higher than 3.0.0 to eliminate the vulnerability.
- Monitor vendor advisories for patches and updates.
Long-Term Security Practices
- Regularly update and patch all software components to prevent known vulnerabilities.
- Implement network segmentation and access controls to limit potential attack surfaces.
Patching and Updates
- Apply security patches provided by the vendor promptly to address the vulnerability and enhance system security.