nginx 1.9.x < 1.9.6 HTTPv2 PRI Double-Free DoS

high Nessus Plugin ID 86884

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Synopsis

The remote web server is affected by a denial of service vulnerability.

Description

According to the self-reported version in its response header, the version of nginx hosted on the remote web server is 1.9.x prior to 1.9.6. It is, therefore, affected by a denial of service vulnerability due to a double-free memory error in the HTTPv2 module that is triggered when handling certain PRI packets. An unauthenticated, remote attacker can exploit this, via a crafted RPI packet, to cause a section of heap-based memory to be freed twice, which can result in crashing the server.

Solution

Upgrade to nginx version 1.9.6 or later.

Plugin Details

Severity: High

ID: 86884

File Name: nginx_1_9_5.nasl

Version: 1.12

Type: combined

Agent: unix

Family: Web Servers

Published: 11/16/2015

Updated: 4/11/2022

Configuration: Enable thorough checks

Supported Sensors: Nessus Agent, Nessus

Risk Information

CVSS Score Rationale: Based on vendor release notes.

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: manual

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:nginx:nginx

Required KB Items: installed_sw/nginx

Patch Publication Date: 10/27/2015

Vulnerability Publication Date: 10/29/2015

Detections

Analytics