PT-2018-2716 · Apache+7 · Apache Http Server+7

Published 2018-10-16 · Updated 2021-07-06 · CVE-2018-17189

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Name of the Vulnerable Software and Affected Versions Apache HTTP Server versions 2.4.37 and prior

Description The issue is related to errors in resource management in the mod http2 module of the Apache HTTP Server, which can lead to uncontrolled resource consumption. An attacker can exploit this by sending specially crafted requests, potentially causing a denial of service. This affects only HTTP/2 (mod http2) connections. The estimated number of potentially affected devices is not specified.

Recommendations For Apache HTTP Server versions 2.4.37 and prior, consider disabling the h2 protocol as a temporary mitigation measure to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

ALSA-2020:4751

ALT-PU-2019-1125

BDU:2019-01563

BDU:2019-01749

CESA-2020_4751

CVE-2018-17189

DSA-4422-1

MGASA-2019-0109

OPENSUSE-SU-2019:0296-1

OPENSUSE-SU-2019_0296-1

OPENSUSE-SU-2019_0305-1

RHSA-2019:3932

RHSA-2019:3933

RHSA-2019:4126

RHSA-2020:4751

RHSA-2020_4751

RLSA-2020:4751

SUSE-SU-2019:0498-1

SUSE-SU-2019:0504-1

SUSE-SU-2019_0498-1

SUSE-SU-2019_0504-1

USN-3937-1

Affected Products

Alt Linux

Almalinux

Apache Http Server

Centos

Red Hat

Rocky Linux

Suse

Ubuntu

References · 102

• https://cve.org/CVERecord?id=CVE-2018-17189 · Security Note
• https://ubuntu.com/security/CVE-2018-17199 · Vendor Advisory
• https://bdu.fstec.ru/vul/2019-01749 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2019:0504-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-17189 · Security Note
• https://ubuntu.com/security/CVE-2019-0217 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/U7N3DUEBFVGQWQEME5HTPTTKDHGHBAC6 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2019:3932 · Vendor Advisory
• https://httpd.apache.org/security/vulnerabilities_24.html · Vendor Advisory
• https://ubuntu.com/security/notices/USN-3937-1 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2020-4751.html · Vendor Advisory
• https://osv.dev/vulnerability/ALSA-2020:4751 · Vendor Advisory
• https://ubuntu.com/security/CVE-2019-0211 · Vendor Advisory
• https://access.redhat.com/errata/RHSA-2019:4126 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2018-17189 · Vendor Advisory