CVE-2016-1902: debian debian_linux Cryptographic Issues
Vulnerability summary
CVE-2016-1902 is a high (CVSS 7.5) Cryptographic Issues vulnerability in debian debian_linux. EPSS estimates a 1.91% chance of exploitation in the next 30 days, higher than 79.4% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 1Timeline
- 01-06-2016PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
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 metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS trend
Probability
1.91%
Chance of exploitation in the next 30 days
Percentile
79%
Versus all other CVEs
30-day change
0.00 pp
From 1.91% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Debian2 products
- symfony< 2.7.9+dfsg-1
- debian_linuxEOL8.0
Sensiolabs1 product
- symfonyEOL≤ 2.3.36 | 2.6.0 | 2.6.1 | 2.6.2 | 2.6.3 | 2.6.4 | 2.6.5 | 2.6.6 | 2.6.7 | 2.6.8 | 2.6.9 | 2.6.10 | 2.6.11 | 2.6.12 | 2.7.0 | 2.7.1 | 2.7.2 | 2.7.3 | 2.7.4 | 2.7.5 | 2.7.6 | 2.7.7 | 2.7.8
Ubuntu1 product
- symfony< 2.7.9+dfsg-1
3 vendors · 4 products
References
7 links- symfony.com/blog/cve-2016-1902-securerandom-s-fallback-not-secure-when-openssl-failsX Refsource CONFIRMVendor AdvisoryREPORT
- www.landaire.net/blog/cve-2016-1902-symfony-securerandom/X Refsource MISC