Cryptographic Issues Affecting symfony package, versions <2.7.9+dfsg-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published1 Jun 2016
- disclosed1 Jun 2016
Introduced: 1 Jun 2016
CVE-2016-1902 (opens in a new tab)How to fix?
Upgrade Debian:12 symfony to version 2.7.9+dfsg-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream symfony package and not the symfony package as distributed by Debian.
See How to fix? for Debian:12 relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2016-1902
- http://www.debian.org/security/2016/dsa-3588
- https://github.com/symfony/symfony/pull/17359
- https://www.landaire.net/blog/cve-2016-1902-symfony-securerandom/
- http://symfony.com/blog/cve-2016-1902-securerandom-s-fallback-not-secure-when-openssl-fails