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Debian dla-3638 : h2o - security update

critical Nessus Plugin ID 184084

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Synopsis

The remote Debian host is missing a security-related update.

Description

The remote Debian 10 host has packages installed that are affected by a vulnerability as referenced in the dla-3638 advisory.

 - ------------------------------------------------------------------------- Debian LTS Advisory DLA-3638-1 [email protected] https://www.debian.org/lts/security/ Anton Gladky October 29, 2023 https://wiki.debian.org/LTS
 - -------------------------------------------------------------------------

 Package : h2o Version : 2.2.5+dfsg2-2+deb10u2 CVE ID : CVE-2023-44487 Debian Bug : 1054232

 A vulnerability has been identified in h2o, a high-performance web server with support for HTTP/2.

 A security vulnerability CVE-2023-44487 was discovered that could potentially be exploited to disrupt server operation.

 The vulnerability in the h2o HTTP/2 server was related to the handling of certain types of HTTP/2 requests. In certain scenarios, an attacker could send a series of malicious requests, causing the server to process them rapidly and exhaust system resources.

 The applied upstream patch changes the ABI. Therefore, if your application is built against any shared libraries of h2o, you need to rebuild it.
 No Debian package is affected.

 For Debian 10 buster, this problem has been fixed in version 2.2.5+dfsg2-2+deb10u2.

 We recommend that you upgrade your h2o packages.

 For the detailed security status of h2o please refer to its security tracker page at:
 https://security-tracker.debian.org/tracker/h2o

 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 this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade the h2o packages.

See Also

https://security-tracker.debian.org/tracker/source-package/h2o

https://security-tracker.debian.org/tracker/CVE-2023-44487

https://packages.debian.org/source/buster/h2o

Plugin Details

Severity: Critical

ID: 184084

File Name: debian_DLA-3638.nasl

Version: 1.2

Type: local

Agent: unix

Published: 10/31/2023

Updated: 1/22/2025

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2023-44487

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:C

CVSS v4

Risk Factor: Critical

Base Score: 9.3

Threat Score: 9.3

Threat Vector: CVSS:4.0/E:A

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:libh2o-dev, p-cpe:/a:debian:debian_linux:libh2o-dev-common, p-cpe:/a:debian:debian_linux:libh2o-evloop-dev, p-cpe:/a:debian:debian_linux:libh2o0.13, cpe:/o:debian:debian_linux:10.0, p-cpe:/a:debian:debian_linux:h2o, p-cpe:/a:debian:debian_linux:h2o-doc, p-cpe:/a:debian:debian_linux:libh2o-evloop0.13

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/31/2023

Vulnerability Publication Date: 10/10/2023

CISA Known Exploited Vulnerability Due Dates: 10/31/2023

Reference Information

CVE: CVE-2023-44487