| Name | CVE-2016-2338 |
| Description | An exploitable heap overflow vulnerability exists in the Psych::Emitter start_document function of Ruby. In Psych::Emitter start_document function heap buffer "head" allocation is made based on tags array length. Specially constructed object passed as element of tags array can increase this array size after mentioned allocation and cause heap overflow. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-2158-1, ELA-1148-1 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| ruby2.1 (PTS) | jessie, jessie (lts) | 2.1.5-2+deb8u14 | fixed |
| ruby2.3 (PTS) | stretch (security) | 2.3.3-1+deb9u11 | fixed |
| stretch (lts), stretch | 2.3.3-1+deb9u12 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| ruby2.1 | source | jessie | 2.1.5-2+deb8u14 | | ELA-1148-1 | |
| ruby2.1 | source | (unstable) | (unfixed) | | | |
| ruby2.3 | source | (unstable) | 2.3.0-1 | | | |
Notes
https://talosintelligence.com/reports/TALOS-2016-0032
https://git.ruby-lang.org/ruby.git/commit/?id=cc0313436160b735a3d41361cb5e3eeb10fcbdad (v2_3_0)
https://git.ruby-lang.org/ruby.git/commit/?id=db48c307944a9a18877236bdf9e9b778875f38ed (v2_3_0)