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 does not properly generate random numbers when used with PHP 5.x without the paragonie/random_compat library and the…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.91%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 1.91% probability · 79th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-310
- Affected
- debian/debian linux · sensiolabs/symfony
- Source
- cve@mitre.org
References
- 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/
- 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/
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.