Critical severity9.8NVD Advisory· Published Mar 27, 2019· Updated Jun 17, 2026
CVE-2019-5420
CVE-2019-5420
Description
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
railtiesRubyGems | >= 5.2.0, < 5.2.2.1 | 5.2.2.1 |
Affected products
13- ghsa-coords12 versionspkg:gem/railtiespkg:rpm/opensuse/rmt-server&distro=openSUSE%20Leap%2015.1pkg:rpm/opensuse/rmt-server&distro=openSUSE%20Leap%2015.2pkg:rpm/opensuse/rmt-server&distro=openSUSE%20Tumbleweedpkg:rpm/suse/rmt-server&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOSpkg:rpm/suse/rmt-server&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSSpkg:rpm/suse/rmt-server&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP1pkg:rpm/suse/rmt-server&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP2pkg:rpm/suse/rmt-server&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP1pkg:rpm/suse/rmt-server&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Server%20Applications%2015%20SP2pkg:rpm/suse/rmt-server&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSSpkg:rpm/suse/rmt-server&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015
>= 5.2.0, < 5.2.2.1+ 11 more
- (no CPE)range: >= 5.2.0, < 5.2.2.1
- (no CPE)range: < 2.6.5-lp151.2.18.2
- (no CPE)range: < 2.6.5-lp152.2.3.1
- (no CPE)range: < 2.6.13-1.1
- (no CPE)range: < 2.6.5-3.34.1
- (no CPE)range: < 2.6.5-3.34.1
- (no CPE)range: < 2.6.5-3.18.1
- (no CPE)range: < 2.6.5-3.3.1
- (no CPE)range: < 2.6.5-3.18.1
- (no CPE)range: < 2.6.5-3.3.1
- (no CPE)range: < 2.6.5-3.34.1
- (no CPE)range: < 2.6.5-3.34.1
- Rails/https://github.com/rails/railsv5Range: 5.2.2.1
Patches
Vulnerability mechanics
References
12- weblog.rubyonrails.org/2019/3/13/Rails-4-2-5-1-5-1-6-2-have-been-released/nvdPatchVendor Advisory
- packetstormsecurity.com/files/152704/Ruby-On-Rails-DoubleTap-Development-Mode-secret_key_base-Remote-Code-Execution.htmlnvdExploitThird Party AdvisoryVDB EntryWEB
- www.exploit-db.com/exploits/46785/nvdExploitThird Party AdvisoryVDB Entry
- github.com/advisories/GHSA-m42h-mh85-4qgcghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2019-5420ghsaADVISORY
- github.com/rubysec/ruby-advisory-db/blob/master/gems/railties/CVE-2019-5420.ymlghsaWEB
- groups.google.com/forum/ghsaWEB
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/Y43636TH4D6T46IC6N2RQVJTRFJAAYGAghsaWEB
- weblog.rubyonrails.org/2019/3/13/Rails-4-2-5-1-5-1-6-2-have-been-releasedghsaWEB
- www.exploit-db.com/exploits/46785ghsaWEB
- groups.google.com/forum/nvd
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y43636TH4D6T46IC6N2RQVJTRFJAAYGA/nvd
News mentions
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