USN-7814-1: LibHTP vulnerabilities

Publication date

9 October 2025

Overview

Several security issues were fixed in LibHTP.


Packages

  • libhtp - Security-aware parser for the HTTP protocol

Details

It was discovered that LibHTP did not correctly handle certain HTTP
headers. A remote attacker could possibly use this issue to cause a denial
of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS,
Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2024-23837)

It was discovered that LibHTP did not correctly parse certain HTTP
requests. A remote attacker could possibly use this issue to cause a
denial of service. This issue only affected Ubuntu 20.04 LTS,
Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2024-28871)

It was discovered that LibHTP did not correctly parse certain HTTP
requests. A remote attacker could possibly use this issue to cause a
denial of service. (CVE-2024-45797)

It was discovered that LibHTP did not correctly handle certain memory
operations. A remote attacker could possibly use...

It was discovered that LibHTP did not correctly handle certain HTTP
headers. A remote attacker could possibly use this issue to cause a denial
of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS,
Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2024-23837)

It was discovered that LibHTP did not correctly parse certain HTTP
requests. A remote attacker could possibly use this issue to cause a
denial of service. This issue only affected Ubuntu 20.04 LTS,
Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2024-28871)

It was discovered that LibHTP did not correctly parse certain HTTP
requests. A remote attacker could possibly use this issue to cause a
denial of service. (CVE-2024-45797)

It was discovered that LibHTP did not correctly handle certain memory
operations. A remote attacker could possibly use this issue to cause a
denial of service. This issue only affected Ubuntu 20.04 LTS,
Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 25.04. (CVE-2025-53537)


Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
25.04 plucky libhtp-dev –  1:0.5.49-1ubuntu0.1
libhtp2 –  1:0.5.49-1ubuntu0.1
24.04 LTS noble libhtp-dev –  1:0.5.46-1ubuntu2+esm1  
libhtp2 –  1:0.5.46-1ubuntu2+esm1  
22.04 LTS jammy libhtp-dev –  1:0.5.39-1ubuntu0.1~esm1  
libhtp2 –  1:0.5.39-1ubuntu0.1~esm1  
20.04 LTS focal libhtp-dev –  1:0.5.32-1ubuntu0.1~esm1  
libhtp2 –  1:0.5.32-1ubuntu0.1~esm1  
18.04 LTS bionic libhtp-dev –  1:0.5.26-1ubuntu0.1~esm1  
libhtp2 –  1:0.5.26-1ubuntu0.1~esm1  
16.04 LTS xenial libhtp-dev –  0.5.15-1ubuntu0.1~esm1  
libhtp1 –  0.5.15-1ubuntu0.1~esm1  

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