CVE-2021-40540

Public Exploit

Description

ulfius_uri_logger in Ulfius HTTP Framework before 2.7.4 omits con_info initialization and a con_info->request NULL check for certain malformed HTTP requests.

9.8

CVSS

Severity: Critical

CVSS 3.1 •

CVSS 2.0 •

EPSS 2.75% Top 15%

Third-Party Advisory packetstormsecurity.com Third-Party Advisory github.com Third-Party Advisory github.com

Affected: n/a n/a

References

Link	Tags
https://github.com/babelouest/ulfius/commit/c83f564c184a27145e07c274b305cabe943bbfaa	third party advisory patch
https://github.com/babelouest/ulfius/compare/v2.7.3...v2.7.4	third party advisory patch
http://packetstormsecurity.com/files/164152/Ulfius-Web-Framework-Remote-Memory-Corruption.html	exploit vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-40540?: CVE-2021-40540 has been scored as a critical severity vulnerability.
How to fix CVE-2021-40540?: To fix CVE-2021-40540, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-40540 being actively exploited in the wild?: It is possible that CVE-2021-40540 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~3% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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