https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Thu, 08 Oct 2026 23:04:41 +0000 https://vulnerability.circl.lu/vuln/cve-2021-42717 <p>ModSecurity 3.x through 3.0.5 mishandles excessively nested JSON objects. Crafted JSON objects with nesting tens-of-thousands deep could result in the web server being unable to service legitimate requests. Even a moderately large (e.g., 300KB) HTTP request can occupy one of the limited NGINX worker processes for minutes and consume almost all of the available CPU on the machine. Modsecurity 2 is similarly vulnerable: the affected versions include 2.8.0 through 2.9.4.</p> <p>ModSecurity 3.x through 3.0.5 mishandles excessively nested JSON objects. Crafted JSON objects with nesting tens-of-thousands deep could result in the web server being unable to service legitimate requests. Even a moderately large (e.g., 300KB) HTTP request can occupy one of the limited NGINX worker processes for minutes and consume almost all of the available CPU on the machine. Modsecurity 2 is similarly vulnerable: the affected versions include 2.8.0 through 2.9.4.</p> https://vulnerability.circl.lu/vuln/cve-2021-42717 https://vulnerability.circl.lu/vuln/usn-6370-1 <p><strong>Affected:</strong> Ubuntu:Pro:14.04:LTS: modsecurity-apache, Ubuntu:Pro:16.04:LTS: modsecurity-apache, Ubuntu:Pro:18.04:LTS: modsecurity-apache, Ubuntu:20.04:LTS: modsecurity-apache, Ubuntu:Pro:22.04:LTS: modsecurity-apache</p> <p>It was discovered that ModSecurity incorrectly handled certain nested JSON objects. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2021-42717)</p> <p>It was discovered that ModSecurity incorrectly handled certain HTTP multipart requests. A remote attacker could possibly use this issue to bypass ModSecurity restrictions. (CVE-2022-48279)</p> <p>It was discovered that ModSecurity incorrectly handled certain file uploads. A remote attacker could possibly use this issue to cause a buffer overflow and a firewall failure. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2023-24021)</p> <p><strong>Affected:</strong> Ubuntu:Pro:14.04:LTS: modsecurity-apache, Ubuntu:Pro:16.04:LTS: modsecurity-apache, Ubuntu:Pro:18.04:LTS: modsecurity-apache, Ubuntu:20.04:LTS: modsecurity-apache, Ubuntu:Pro:22.04:LTS: modsecurity-apache</p> <p>It was discovered that ModSecurity incorrectly handled certain nested JSON objects. An attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS and Ubuntu 20.04 LTS. (CVE-2021-42717)</p> <p>It was discovered that ModSecurity incorrectly handled certain HTTP multipart requests. A remote attacker could possibly use this issue to bypass ModSecurity restrictions. (CVE-2022-48279)</p> <p>It was discovered that ModSecurity incorrectly handled certain file uploads. A remote attacker could possibly use this issue to cause a buffer overflow and a firewall failure. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2023-24021)</p> https://vulnerability.circl.lu/vuln/usn-6370-1