Vulnerability · Published Sep 7, 2021 · Assigned by mitre
CVE-2021-40540
Critical 9.8
In plain English
A critical-severity security flaw in the ulfius package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.6% (higher than 86% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)9.8Critical
Exploit odds (30 days)2.6%top 14.4% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | ulfius | 2.7.1-2 | DEBIAN-CVE-2021-40540 |
| Debian:13 | ulfius | 2.7.1-2 | DEBIAN-CVE-2021-40540 |
| Debian:14 | ulfius | 2.7.1-2 | DEBIAN-CVE-2021-40540 |
| Ubuntu:22.04:LTS | ulfius | no fix listed | UBUNTU-CVE-2021-40540 |