CVE-2021-3466: fedoraproject fedora Classic Buffer Overflow

Vulnerability summary

CVE-2021-3466 is a high (CVSS 10.0) Classic Buffer Overflow vulnerability in fedoraproject fedora. EPSS estimates a 8.74% chance of exploitation in the next 30 days, higher than 95.1% of scored vulnerabilities.

Timeline

1. 25-03-2021
   PublishedVulnerability first disclosed.
2. 03-08-2024
   Last modifiedVulnerability information updated.

Description

A flaw was found in libmicrohttpd. A missing bounds check in the post_process_urlencoded function leads to a buffer overflow, allowing a remote attacker to write arbitrary data in an application that uses libmicrohttpd. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. Only version 0.9.70 is vulnerable.

• CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.