LibHTP is a security-aware parser for the HTTP protocol and the related bits and pieces. Prior to version 0.5.49, unbounded processing of HTTP request and response headers can lead to excessive CPU time and memory utilization, possibly leading to extreme slowdowns. This issue is addressed in 0.5.49.

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.04 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7814-1 advisory.

    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)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4295 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4295-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                          Adrian Bunk     September 08, 2025                            https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : libhtp     Version        : 1:0.5.36-1+deb11u1     CVE ID         : CVE-2024-23837 CVE-2024-45797

    Multiple cases of denial of service due to excessive CPU time and memory     utilization have been fixed in LibHTP, a parser for the HTTP protocol     mainly used by the network analysis and threat detection software Suricata.

    For Debian 11 bullseye, these problems have been fixed in version     1:0.5.36-1+deb11u1.

    We recommend that you upgrade your libhtp packages.

    For the detailed security status of libhtp please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/libhtp

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - LibHTP is a security-aware parser for the HTTP protocol and the related bits and pieces. Prior to version     0.5.49, unbounded processing of HTTP request and response headers can lead to excessive CPU time and     memory utilization, possibly leading to extreme slowdowns. This issue is addressed in 0.5.49.
    (CVE-2024-45797)

Note that Nessus relies on the presence of the package as reported by the vendor.

The version of OISF Suricata installed on the remote host is prior to 6.0.19 or 7.x prior to 7.0.5. It is, therefore, affected by multiple vulnerabilities: 

  - Missing initialization of the random seed for thash leads to datasets having predictable hash table behavior. This     can lead to dataset file loading to use excessive time to load, as well as runtime performance issues during traffic     handling. (CVE-2024-47187)     
  - A logic error during fragment reassembly can lead to failed reassembly for valid traffic. An attacker     could craft packets to trigger this behavior. (CVE-2024-45796)     
  - Rules using datasets with the non-functional / unimplemented unset option can trigger an     assertion during traffic parsing, leading to denial of service. (CVE-2024-45795)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Severity
269999	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.04 : LibHTP vulnerabilities (USN-7814-1)	Nessus	Ubuntu Local Security Checks	high
261691	Debian dla-4295 : libhtp-dev - security update	Nessus	Debian Local Security Checks	high
228877	Linux Distros Unpatched Vulnerability : CVE-2024-45797	Nessus	Misc.	high
214273	Suricata < 7.0.7 Multiple Vulnerabilities	Nessus	Misc.	medium

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CVE-2024-45797

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