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Debian DLA-3555-1 : php7.3 - LTS security update

critical Nessus Plugin ID 180518

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Synopsis

The remote Debian host is missing one or more security-related updates.

Description

The remote Debian 10 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-3555 advisory.

 - In PHP versions 8.0.* before 8.0.30, 8.1.* before 8.1.22, and 8.2.* before 8.2.8 various XML functions rely on libxml global state to track configuration variables, like whether external entities are loaded.
 This state is assumed to be unchanged unless the user explicitly changes it by calling appropriate function. However, since the state is process-global, other modules - such as ImageMagick - may also use this library within the same process, and change that global state for their internal purposes, and leave it in a state where external entities loading is enabled. This can lead to the situation where external XML is parsed with external entities loaded, which can lead to disclosure of any local files accessible to PHP. This vulnerable state may persist in the same process across many requests, until the process is shut down. (CVE-2023-3823)

 - In PHP version 8.0.* before 8.0.30, 8.1.* before 8.1.22, and 8.2.* before 8.2.8, when loading phar file, while reading PHAR directory entries, insufficient length checking may lead to a stack buffer overflow, leading potentially to memory corruption or RCE. (CVE-2023-3824)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade the php7.3 packages.

For Debian 10 buster, these problems have been fixed in version 7.3.31-1~deb10u5.

See Also

https://security-tracker.debian.org/tracker/source-package/php7.3

https://www.debian.org/lts/security/2023/dla-3555

https://security-tracker.debian.org/tracker/CVE-2023-3823

https://security-tracker.debian.org/tracker/CVE-2023-3824

https://packages.debian.org/source/buster/php7.3

Plugin Details

Severity: Critical

ID: 180518

File Name: debian_DLA-3555.nasl

Version: 1.2

Type: local

Agent: unix

Published: 9/6/2023

Updated: 10/30/2023

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

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

CVSS Score Source: CVE-2023-3824

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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

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

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:libapache2-mod-php7.3, p-cpe:/a:debian:debian_linux:libphp7.3-embed, p-cpe:/a:debian:debian_linux:php7.3, p-cpe:/a:debian:debian_linux:php7.3-bcmath, p-cpe:/a:debian:debian_linux:php7.3-bz2, p-cpe:/a:debian:debian_linux:php7.3-cgi, p-cpe:/a:debian:debian_linux:php7.3-cli, p-cpe:/a:debian:debian_linux:php7.3-common, p-cpe:/a:debian:debian_linux:php7.3-sybase, p-cpe:/a:debian:debian_linux:php7.3-tidy, p-cpe:/a:debian:debian_linux:php7.3-xml, p-cpe:/a:debian:debian_linux:php7.3-xmlrpc, p-cpe:/a:debian:debian_linux:php7.3-xsl, p-cpe:/a:debian:debian_linux:php7.3-zip, cpe:/o:debian:debian_linux:10.0, p-cpe:/a:debian:debian_linux:php7.3-curl, p-cpe:/a:debian:debian_linux:php7.3-dba, p-cpe:/a:debian:debian_linux:php7.3-dev, p-cpe:/a:debian:debian_linux:php7.3-enchant, p-cpe:/a:debian:debian_linux:php7.3-fpm, p-cpe:/a:debian:debian_linux:php7.3-gd, p-cpe:/a:debian:debian_linux:php7.3-gmp, p-cpe:/a:debian:debian_linux:php7.3-imap, p-cpe:/a:debian:debian_linux:php7.3-interbase, p-cpe:/a:debian:debian_linux:php7.3-intl, p-cpe:/a:debian:debian_linux:php7.3-json, p-cpe:/a:debian:debian_linux:php7.3-ldap, p-cpe:/a:debian:debian_linux:php7.3-mbstring, p-cpe:/a:debian:debian_linux:php7.3-mysql, p-cpe:/a:debian:debian_linux:php7.3-odbc, p-cpe:/a:debian:debian_linux:php7.3-opcache, p-cpe:/a:debian:debian_linux:php7.3-pgsql, p-cpe:/a:debian:debian_linux:php7.3-phpdbg, p-cpe:/a:debian:debian_linux:php7.3-pspell, p-cpe:/a:debian:debian_linux:php7.3-readline, p-cpe:/a:debian:debian_linux:php7.3-recode, p-cpe:/a:debian:debian_linux:php7.3-snmp, p-cpe:/a:debian:debian_linux:php7.3-soap, p-cpe:/a:debian:debian_linux:php7.3-sqlite3

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: 9/5/2023

Vulnerability Publication Date: 8/3/2023

Reference Information

CVE: CVE-2023-3823, CVE-2023-3824