| Name | 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 924521 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| rails (PTS) | jessie, jessie (lts) | 2:4.1.8-1+deb8u9 | fixed |
| stretch (security), stretch (lts), stretch | 2:4.2.7.1-1+deb9u5 | fixed |
| buster | 2:5.2.2.1+dfsg-1+deb10u3 | fixed |
| buster (security) | 2:5.2.2.1+dfsg-1+deb10u5 | fixed |
| bullseye (security), bullseye | 2:6.0.3.7+dfsg-2+deb11u2 | fixed |
| bookworm | 2:6.1.7.3+dfsg-1 | fixed |
| sid, trixie | 2:6.1.7.3+dfsg-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| rails | source | wheezy | (unfixed) | end-of-life | | |
| rails | source | jessie | (not affected) | | | |
| rails | source | stretch | (not affected) | | | |
| rails | source | (unstable) | 2:5.2.2.1+dfsg-1 | | | 924521 |
Notes
[stretch] - rails <not-affected> (Vulnerable code not present)
[jessie] - rails <not-affected> (vulnerable code is not present in 4.x)
https://www.openwall.com/lists/oss-security/2019/03/13/3
Introduced in https://github.com/rails/rails/commit/69f976b859cae7f9d050152103da018b7f5dda6d