NULL Pointer Dereference Affecting apache2 package, versions <2.4.46-4ubuntu1.1


Severity

Recommended
low

Based on Ubuntu security rating

    Threat Intelligence

    EPSS
    0.62% (80th percentile)

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  • Snyk ID SNYK-UBUNTU2104-APACHE2-1303219
  • published 16 Jun 2021
  • disclosed 10 Jun 2021

How to fix?

Upgrade Ubuntu:21.04 apache2 to version 2.4.46-4ubuntu1.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream apache2 package and not the apache2 package as distributed by Ubuntu. See How to fix? for Ubuntu:21.04 relevant fixed versions and status.

Apache HTTP Server versions 2.4.41 to 2.4.46 mod_proxy_http can be made to crash (NULL pointer dereference) with specially crafted requests using both Content-Length and Transfer-Encoding headers, leading to a Denial of Service

CVSS Scores

version 3.1
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NVD

7.5 high
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    Low
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    None
  • Availability (A)
    High
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SUSE

8.1 high
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Red Hat

7.5 high