Debian DSA-4921-1 : nginx - security update

critical Nessus Plugin ID 150115

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Synopsis

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

Description

Luis Merino, Markus Vervier and Eric Sesterhenn discovered an off-by-one in Nginx, a high-performance web and reverse proxy server, which could result in denial of service and potentially the execution of arbitrary code.

Solution

Upgrade the nginx packages.

For the stable distribution (buster), this problem has been fixed in version 1.14.2-2+deb10u4.

See Also

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=989095

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

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

https://www.debian.org/security/2021/dsa-4921

Plugin Details

Severity: Critical

ID: 150115

File Name: debian_DSA-4921.nasl

Version: 1.4

Type: local

Agent: unix

Published: 6/1/2021

Updated: 10/18/2021

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2021-23017

VPR

Risk Factor: High

Score: 8

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P

Temporal Vector: E:POC/RL:OF/RC:C

CVSS v3

Risk Factor: Critical

Base Score: 9.4

Temporal Score: 8.4

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

Temporal Vector: E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:nginx, cpe:/o:debian:debian_linux:10.0

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: 5/28/2021

Vulnerability Publication Date: 6/1/2021

Reference Information

CVE: CVE-2021-23017

DSA: 4921