CVE-2018-20355 : What You Need to Know
Learn about CVE-2018-20355, a vulnerability in Cesanta Mongoose Embedded Web Server Library 6.13 and earlier, allowing for denial of service or remote code execution. Find mitigation steps and preventive measures here.
Cesanta Mongoose Embedded Web Server Library 6.13 and earlier is vulnerable to a use-after-free flaw, allowing for a denial of service or potential remote code execution.
Understanding CVE-2018-20355
This CVE involves a specific vulnerability in the Mongoose Embedded Web Server Library.
What is CVE-2018-20355?
The vulnerability in the mg_http_free_proto_data_cgi function in mongoose.c allows for an invalid write of 8 bytes due to a use-after-free issue. This can lead to a denial of service (application crash) or even remote code execution.
The Impact of CVE-2018-20355
Exploitation of this vulnerability can result in a denial of service condition or potentially enable an attacker to execute arbitrary code remotely.
Technical Details of CVE-2018-20355
This section delves into the technical aspects of the CVE.
Vulnerability Description
The vulnerability stems from a use-after-free flaw in the mg_http_free_proto_data_cgi function in Cesanta Mongoose Embedded Web Server Library 6.13 and earlier, allowing for an invalid write of 8 bytes.
Affected Systems and Versions
- Product: Not applicable
- Vendor: Not applicable
- Versions: 6.13 and earlier are affected
Exploitation Mechanism
The vulnerability can be exploited by triggering the use-after-free condition in the mg_http_free_proto_data_cgi function, leading to the invalid write and subsequent impact.
Mitigation and Prevention
Protective measures to address CVE-2018-20355.
Immediate Steps to Take
- Apply vendor patches or updates promptly to mitigate the vulnerability
- Monitor security advisories for any new information or patches related to this CVE
Long-Term Security Practices
- Regularly update and patch software to address known vulnerabilities
- Implement network security measures to detect and prevent potential exploitation of vulnerabilities
Patching and Updates
- Ensure that the Cesanta Mongoose Embedded Web Server Library is updated to a non-vulnerable version
- Follow best practices for secure coding and regularly review and update code for potential vulnerabilities