Home/CVE/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 d
CVE

CVE-2016-1902

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 d

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.

HIGH · CVSS 7.5 EPSS 0.00397
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
▤

Affected Products & Versions

3
debian linuxall versions
sensiolabs symfony<= 2.3.36
sensiolabs symfonyall versions
▤

Affected Packages

3
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Packagist symfony/security HIGH fixed in 2.3.37
Packagist symfony/security-core HIGH fixed in 2.6.13
Packagist symfony/symfony HIGH fixed in 2.3.37
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.0 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD01 Jun 2016 · 10:59 PM
CVSS VectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://symfony.com/blog/cve-2016-1902-securerandom-s-fallback-not-secure-when-openssl-failsVendor Advisory
http://www.debian.org/security/2016/dsa-3588
https://github.com/symfony/symfony/pull/17359Patch
https://www.landaire.net/blog/cve-2016-1902-symfony-securerandom/
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