CVE-2018-20843
7.5 · HIGHOverview
CVE-2018-20843 is a high-severity vulnerability affecting libexpat_project libexpat. It was published on June 24, 2019 and has a CVSS 3.1 base score of 7.5 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical Description
In libexpat in Expat before 2.2.7, XML input including XML names that contain a large number of colons could make the XML parser consume a high amount of RAM and CPU resources while processing (enough to be usable for denial-of-service attacks).
Remediation
Check the references section for vendor advisories and patches from libexpat_project. Update libexpat to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| libexpat_project | libexpat | >= 0, < 2.2.7 | Affected |
| oracle | hospitality_res_3700 | 5.7 | Affected |
| tenable | nessus | >= 0, < 8.15.0 | Affected |
References
Frequently Asked Questions
What is CVE-2018-20843?
CVE-2018-20843 is a high-severity vulnerability affecting libexpat_project libexpat. It was published on June 24, 2019 and has a CVSS 3.1 base score of 7.5 (HIGH).
How severe is CVE-2018-20843?
This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2018-20843?
Check the references section for vendor advisories and patches from libexpat_project. Update libexpat to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2018-20843?
CyberStrike's AI-powered security agents can automatically detect CVE-2018-20843 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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