CVE-2019-5420CWE-77

CVE-2019-5420: vulnerability in Rails https://github.com/rails/rails

Published · Updated

60Vexday Risk Score

Patch soon. It has a working public exploit.

ssvc Attendepss 89%
from disclosure to weapon0 days
Published on NVDMar 27
1st PoCMar 21
metasploitMar 13
exploitation probability
89%top 1% of all CVEs
observed exploitation
nono source reports it
15 public exploit(s)
What the vendors declare (VEX)

Official vendor statements in CSAF/VEX format: whether their product is affected, already fixed, or ruled out — and why. These are the vendor's assertions, not Vexday's judgment.

Red HatVEX document ↗
Not affected
1 product (4 components) — because the vulnerable code is not present in the product
Red Hat Software Collections
A remote code execution vulnerability in development mode Rails <5.2.2.1, <6.0.0.beta3 can allow an attacker to guess the automatically generated development mode secret token. This secret token can be used in combination with other Rails internals to escalate to a remote code execution exploit.
Affected products
Rails · https://github.com/rails/rails
public PoCs found — 15✓ VexDay Proof
exploitdb✓ VexDay Proofwww.exploit-db.com/exploits/46785githubgithub.com/knqyf263/CVE-2019-5420★ 8githubgithub.com/j4k0m/CVE-2019-5420★ 5githubgithub.com/laffray/ruby-RCE-CVE-2019-5420-★ 5githubgithub.com/scumdestroy/CVE-2019-5420.rb★ 3githubgithub.com/WildWestCyberSecurity/cve-2019-5420-POC★ 1githubgithub.com/PenTestical/CVE-2019-5420★ 0githubgithub.com/sealldeveloper/CVE-2019-5420-PoC★ 0githubgithub.com/AnasTaoutaou/CVE-2019-5420★ 0githubgithub.com/mmeza-developer/CVE-2019-5420-RCE★ 0githubgithub.com/trickstersec/CVE-2019-5420★ 0githubgithub.com/cved-sources/cve-2019-5420★ 0githubgithub.com/Eremiel/CVE-2019-5420★ 0cve_referencepacketstormsecurity.com/files/152704/Ruby-On-Rails-DoubleTap-Development-Mode-secret_key_base-Remote-Code-Execution.htmlunverifiedcve_referencewww.exploit-db.com/exploits/46785/unverified
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — Rails https://github.com/rails/rails

In the same product, most dangerous first.

CVE-2019-5418HIGHCVE-2019-5418EPSS 98.5%KEVCVE-2019-5419—CVE-2019-5419EPSS 8.8%
References
http://packetstormsecurity.com/files/152704/Ruby-On-Rails-DoubleTap-Development-Mode-secret_key_base-Remote-Code-Execution.htmlhttps://groups.google.com/forum/#%21topic/rubyonrails-security/IsQKvDqZdKwhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y43636TH4D6T46IC6N2RQVJTRFJAAYGA/https://weblog.rubyonrails.org/2019/3/13/Rails-4-2-5-1-5-1-6-2-have-been-released/https://www.exploit-db.com/exploits/46785/