Debian DLA-2670-1 : nginx security update

critical Nessus Plugin ID 150097

Language:

New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote Debian host is missing a security 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.

For Debian 9 stretch, this problem has been fixed in version 1.10.3-1+deb9u6.

We recommend that you upgrade your nginx packages.

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

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Upgrade the affected packages.

See Also

https://lists.debian.org/debian-lts-announce/2021/05/msg00025.html

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

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

Plugin Details

Severity: Critical

ID: 150097

File Name: debian_DLA-2670.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:libnginx-mod-http-auth-pam, p-cpe:/a:debian:debian_linux:libnginx-mod-http-cache-purge, p-cpe:/a:debian:debian_linux:libnginx-mod-http-dav-ext, p-cpe:/a:debian:debian_linux:libnginx-mod-http-echo, p-cpe:/a:debian:debian_linux:libnginx-mod-http-fancyindex, p-cpe:/a:debian:debian_linux:libnginx-mod-http-geoip, p-cpe:/a:debian:debian_linux:libnginx-mod-http-headers-more-filter, p-cpe:/a:debian:debian_linux:libnginx-mod-http-image-filter, p-cpe:/a:debian:debian_linux:libnginx-mod-http-lua, p-cpe:/a:debian:debian_linux:libnginx-mod-http-ndk, p-cpe:/a:debian:debian_linux:libnginx-mod-http-perl, p-cpe:/a:debian:debian_linux:libnginx-mod-http-subs-filter, p-cpe:/a:debian:debian_linux:libnginx-mod-http-uploadprogress, p-cpe:/a:debian:debian_linux:libnginx-mod-http-upstream-fair, p-cpe:/a:debian:debian_linux:libnginx-mod-http-xslt-filter, p-cpe:/a:debian:debian_linux:libnginx-mod-mail, p-cpe:/a:debian:debian_linux:libnginx-mod-nchan, p-cpe:/a:debian:debian_linux:libnginx-mod-stream, p-cpe:/a:debian:debian_linux:nginx, p-cpe:/a:debian:debian_linux:nginx-common, p-cpe:/a:debian:debian_linux:nginx-doc, p-cpe:/a:debian:debian_linux:nginx-extras, p-cpe:/a:debian:debian_linux:nginx-full, p-cpe:/a:debian:debian_linux:nginx-light, cpe:/o:debian:debian_linux:9.0

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: 5/30/2021

Vulnerability Publication Date: 6/1/2021

Reference Information

CVE: CVE-2021-23017