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CVE-2016-1902

Published: 1 June 2016

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.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
symfony
Launchpad, Ubuntu, Debian
precise Does not exist

trusty Does not exist

upstream
Released (2.7.9+dfsg-1, 2.3.37, 2.6.13, and 2.7.9)
wily Ignored
(end of life)
xenial Not vulnerable
(2.7.9+dfsg-1)
vivid Ignored
(end of life)
Patches:
upstream: https://github.com/symfony/symfony/pull/17359

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact None
Availability impact None
Vector CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N