CVE-2021-41524

moderate-risk

Published 2021-10-05

While fuzzing the 2.4.49 httpd, a new null pointer dereference was detected during HTTP/2 request processing, allowing an external source to DoS the server. This requires a specially crafted request. The vulnerability was recently introduced in version 2.4.49. No exploit is known to the project.

Do I need to act?

7.1% chance of exploitation in next 30 days

EPSS score — moderate exploit probability

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 7.5/10 High

NETWORK / LOW complexity

Affected Products (7)

Http Server

Fedora

Instantis Enterprisetrack

Cloud Backup

Affected Vendors

Apache Oracle Fedoraproject Netapp

References (16)

Mailing List http://www.openwall.com/lists/oss-security/2021/10/05/1

Vendor Advisory https://httpd.apache.org/security/vulnerabilities_24.html

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...

Third Party Advisory https://security.gentoo.org/glsa/202208-20

Third Party Advisory https://security.netapp.com/advisory/ntap-20211029-0009/

Third Party Advisory https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-a...

Patch https://www.oracle.com/security-alerts/cpujan2022.html

Mailing List http://www.openwall.com/lists/oss-security/2021/10/05/1

Vendor Advisory https://httpd.apache.org/security/vulnerabilities_24.html

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro...

Third Party Advisory https://security.gentoo.org/glsa/202208-20

Third Party Advisory https://security.netapp.com/advisory/ntap-20211029-0009/

Third Party Advisory https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-a...

Patch https://www.oracle.com/security-alerts/cpujan2022.html

/ 100

moderate-risk

Severity 26/34 · High

Exploitability 9/34 · Low

Exposure 14/34 · Moderate