CVE-2021-41524

high
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

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.

References

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

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

https://lists.fedoraproject.org/archives/list/[email protected]/message/DSM6UWQICBJ2TU727RENU3HBKEAFLT6T/

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apache-httpd-pathtrv-LAzg68cZ

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

https://lists.fedoraproject.org/archives/list/[email protected]/message/EUVJVRJRBW5QVX4OY3NOHZDQ3B3YOTSG/

Details

Source: MITRE

Published: 2021-10-05

Updated: 2021-11-28

Type: CWE-476

Risk Information

CVSS v2

Base Score: 5

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Impact Score: 2.9

Exploitability Score: 10

Severity: MEDIUM

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Impact Score: 3.6

Exploitability Score: 3.9

Severity: HIGH

Tenable Plugins

View all (5 total)

IDNameProductFamilySeverity
154188Amazon Linux AMI : httpd24 (ALAS-2021-1543)NessusAmazon Linux Local Security Checks
critical
154179Amazon Linux 2 : httpd (ALAS-2021-1716)NessusAmazon Linux Local Security Checks
critical
153894FreeBSD : Apache httpd -- Multiple vulnerabilities (25b78bdd-25b8-11ec-a341-d4c9ef517024)NessusFreeBSD Local Security Checks
high
113014Apache 2.4.49 < 2.4.50 Multiple VulnerabilitiesWeb Application ScanningComponent Vulnerability
high
153884Apache 2.4.49 < 2.4.50 Multiple VulnerabilitiesNessusWeb Servers
high