Apache HTTP Server up to 2.4.46 mod_session null pointer dereference

Summaryinfo

A vulnerability has been found in Apache HTTP Server up to 2.4.46 and classified as problematic. This affects an unknown function of the component mod_session. This manipulation causes null pointer dereference. This vulnerability is tracked as CVE-2021-26690. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Apache HTTP Server up to 2.4.46 (Web Server). It has been declared as problematic. Affected by this vulnerability is an unknown part of the component mod_session. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability.

The weakness was disclosed 06/10/2021. It is possible to read the advisory at httpd.apache.org. This vulnerability is known as CVE-2021-26690. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 247826 (TencentOS Server 2: httpd (TSSA-2025:0526)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 2.4.48 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (247826). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Web Server

Vendor

• Apache

Name

• HTTP Server

Version

• 2.4.0
• 2.4.1
• 2.4.2
• 2.4.3
• 2.4.4
• 2.4.5
• 2.4.6
• 2.4.7
• 2.4.8
• 2.4.9
• 2.4.10
• 2.4.11
• 2.4.12
• 2.4.13
• 2.4.14
• 2.4.15
• 2.4.16
• 2.4.17
• 2.4.18
• 2.4.19
• 2.4.20
• 2.4.21
• 2.4.22
• 2.4.23
• 2.4.24
• 2.4.25
• 2.4.26
• 2.4.27
• 2.4.28
• 2.4.29
• 2.4.30
• 2.4.31
• 2.4.32
• 2.4.33
• 2.4.34
• 2.4.35
• 2.4.36
• 2.4.37
• 2.4.38
• 2.4.39
• 2.4.40
• 2.4.41
• 2.4.42
• 2.4.43
• 2.4.44
• 2.4.45
• 2.4.46

License

• open-source

Website

• Vendor: https://www.apache.org/

CPE 2.3info

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CPE 2.2info

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Be aware that VulDB is the high quality source for vulnerability data.

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