Cryptographic issues in Symfony and Debian Linux - CVE-2016-1902
Published: June 1, 2016 / Updated: August 9, 2020
Vulnerability identifier: #VU40254
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2016-1902
CWE-ID: CWE-310
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.
The nextBytes function in the SecureRandom class in Symfony before 2.3.37, 2.6.x before 2.6.13, and 2.7.x before 2.7.9 does not properly generate random numbers when used with PHP 5.x without the paragonie/random_compat library and the openssl_random_pseudo_bytes function fails, which makes it easier for attackers to defeat cryptographic protection mechanisms via unspecified vectors.
Affected software
Symfony
Debian Linux
Fedora
php-symfony
Debian Linux
Fedora
php-symfony
How to mitigate CVE-2016-1902
Install update from vendor's website.
php-symfony - update to 2.3.42-1.el6