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SUSE SLES15 : Recommended update for php7 (SUSE-SU-2021:3943-1)

high Nessus Plugin ID 155913

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Synopsis

The remote SUSE host is missing one or more security updates.

Description

The remote SUSE Linux SLES15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:3943-1 advisory.

 - In PHP versions 7.3.x up to and including 7.3.31, 7.4.x below 7.4.25 and 8.0.x below 8.0.12, when running PHP FPM SAPI with main FPM daemon process running as root and child worker processes running as lower- privileged users, it is possible for the child processes to access memory shared with the main process and write to it, modifying it in a way that would cause the root process to conduct invalid memory reads and writes, which can be used to escalate privileges from local unprivileged user to the root user.
 (CVE-2021-21703)

 - In PHP versions 7.3.x below 7.3.33, 7.4.x below 7.4.26 and 8.0.x below 8.0.13, certain XML parsing functions, like simplexml_load_file(), URL-decode the filename passed to them. If that filename contains URL-encoded NUL character, this may cause the function to interpret this as the end of the filename, thus interpreting the filename differently from what the user intended, which may lead it to reading a different file than intended. (CVE-2021-21707)

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

Solution

Update the affected packages.

See Also

https://bugzilla.suse.com/1175508

https://bugzilla.suse.com/1192050

https://bugzilla.suse.com/1193041

https://www.suse.com/security/cve/CVE-2021-21703

https://www.suse.com/security/cve/CVE-2021-21707

http://www.nessus.org/u?afd9aadb

Plugin Details

Severity: High

ID: 155913

File Name: suse_SU-2021-3943-1.nasl

Version: 1.6

Type: local

Agent: unix

Published: 12/7/2021

Updated: 10/18/2023

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: Medium

Base Score: 6.9

Temporal Score: 5.7

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

CVSS Score Source: CVE-2021-21703

CVSS v3

Risk Factor: High

Base Score: 7

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: p-cpe:/a:novell:suse_linux:php7-devel, p-cpe:/a:novell:suse_linux:php7-iconv, p-cpe:/a:novell:suse_linux:php7-fpm, p-cpe:/a:novell:suse_linux:php7-curl, p-cpe:/a:novell:suse_linux:php7-zlib, p-cpe:/a:novell:suse_linux:php7-tokenizer, p-cpe:/a:novell:suse_linux:php7-xmlreader, p-cpe:/a:novell:suse_linux:php7-ctype, p-cpe:/a:novell:suse_linux:php7-fileinfo, p-cpe:/a:novell:suse_linux:php7-posix, p-cpe:/a:novell:suse_linux:php7-snmp, p-cpe:/a:novell:suse_linux:php7-sqlite, p-cpe:/a:novell:suse_linux:php7-sysvmsg, p-cpe:/a:novell:suse_linux:php7-xsl, p-cpe:/a:novell:suse_linux:apache2-mod_php7, p-cpe:/a:novell:suse_linux:php7-dba, p-cpe:/a:novell:suse_linux:php7-readline, p-cpe:/a:novell:suse_linux:php7-odbc, p-cpe:/a:novell:suse_linux:php7-exif, p-cpe:/a:novell:suse_linux:php7-mysql, p-cpe:/a:novell:suse_linux:php7-mbstring, p-cpe:/a:novell:suse_linux:php7-enchant, p-cpe:/a:novell:suse_linux:php7-opcache, p-cpe:/a:novell:suse_linux:php7-pdo, p-cpe:/a:novell:suse_linux:php7-shmop, p-cpe:/a:novell:suse_linux:php7-sysvshm, p-cpe:/a:novell:suse_linux:php7-bz2, p-cpe:/a:novell:suse_linux:php7-dom, p-cpe:/a:novell:suse_linux:php7-tidy, p-cpe:/a:novell:suse_linux:php7-sysvsem, p-cpe:/a:novell:suse_linux:php7-gettext, p-cpe:/a:novell:suse_linux:php7-ldap, p-cpe:/a:novell:suse_linux:php7-calendar, p-cpe:/a:novell:suse_linux:php7-intl, p-cpe:/a:novell:suse_linux:php7-json, p-cpe:/a:novell:suse_linux:php7-sodium, p-cpe:/a:novell:suse_linux:php7-phar, p-cpe:/a:novell:suse_linux:php7-xmlwriter, p-cpe:/a:novell:suse_linux:php7-embed, p-cpe:/a:novell:suse_linux:php7-pcntl, p-cpe:/a:novell:suse_linux:php7-xmlrpc, cpe:/o:novell:suse_linux:15, p-cpe:/a:novell:suse_linux:php7-bcmath, p-cpe:/a:novell:suse_linux:php7-gd, p-cpe:/a:novell:suse_linux:php7-sockets, p-cpe:/a:novell:suse_linux:php7, p-cpe:/a:novell:suse_linux:php7-gmp, p-cpe:/a:novell:suse_linux:php7-fastcgi, p-cpe:/a:novell:suse_linux:php7-pgsql, p-cpe:/a:novell:suse_linux:php7-openssl, p-cpe:/a:novell:suse_linux:php7-zip, p-cpe:/a:novell:suse_linux:php7-soap, p-cpe:/a:novell:suse_linux:php7-ftp

Required KB Items: Host/local_checks_enabled, Host/cpu, Host/SuSE/release, Host/SuSE/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 12/6/2021

Vulnerability Publication Date: 10/25/2021

Reference Information

CVE: CVE-2021-21703, CVE-2021-21707

IAVA: 2021-A-0503-S, 2021-A-0566-S

SuSE: SUSE-SU-2021:3943-1