Fedora 34: 2021-d867b595d1 Critical: php SSRF Bypass and Fixes

PHP is an HTML-embedded scripting language. PHP attempts to make it

easy for developers to write dynamically generated web pages. PHP also

offers built-in database integration for several commercial and

non-commercial database management systems, so writing a

database-enabled webpage with PHP is fairly simple. The most common

use of PHP coding is probably as a replacement for CGI scripts.

**PHP version 7.4.21** (01 Jul 2021) **Core:** * Fixed bug php#81068 (Double

free in realpath_cache_clean()). (Dimitry Andric) * Fixed bug php#76359

(open_basedir bypass through adding ".."). (cmb) * Fixed bug php#81090 (Typed

property performance degradation with .= operator). (Nikita) * Fixed bug

php#81070 (Integer underflow in memory limit comparison). (Peter van Dommelen) *

Fixed bug php#81122 (SSRF bypass in FILTER_VALIDATE_URL). (**CVE-2021-21705**)

(cmb) **Bzip2:** * Fixed bug php#81092 (fflush before stream_filter_remove

corrupts stream). (cmb) **OpenSSL:** * Fixed bug php#76694 (native Windows

cert verification uses CN as sever name). (cmb) **PDO_Firebird:** * Fixed bug

php#76448 (Stack buffer overflow in firebird_info_cb). (**CVE-2021-21704**)

(cmb) * Fixed bug php#76449 (SIGSEGV in firebird_handle_doer).

(**CVE-2021-21704**) (cmb) * Fixed bug php#76450 (SIGSEGV in

firebird_stmt_execute). (**CVE-2021-21704**) (cmb) * Fixed bug php#76452 (Crash

while parsing blob data in firebird_fetch_blob). (**CVE-2021-21704**) (cmb)

**Standard:** * Fixed bug php#81048 (phpinfo(INFO_VARIABLES) "Array to string

conversion"). (cmb)

* Tue Jun 29 2021 Remi Collet - 7.4.21-1

- Update to 7.4.21 - https://www.php.net/releases/7_4_21.php

[ 1 ] Bug #1978755 - CVE-2021-21705 php: SSRF bypass in FILTER_VALIDATE_URL

https://bugzilla.redhat.com/show_bug.cgi?id=1978755

[ 2 ] Bug #1978790 - CVE-2021-21704 php: security issues in pdo_firebase module

https://bugzilla.redhat.com/show_bug.cgi?id=1978790

su -c 'dnf upgrade --advisory FEDORA-2021-d867b595d1' at the command

line. For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

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