| Name | CVE-2017-0898 |
| Description | Ruby before 2.4.2, 2.3.5, and 2.2.8 is vulnerable to a malicious format string which contains a precious specifier (*) with a huge minus value. Such situation can lead to a buffer overrun, resulting in a heap memory corruption or an information disclosure from the heap. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more) |
| References | DLA-1113-1, DLA-1114-1, DLA-1421-1, DSA-4031-1 |
| NVD severity | medium (attack range: remote) |
| Debian Bugs | 875936 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| ruby2.1 (PTS) | jessie | 2.1.5-2+deb8u3 | vulnerable |
| jessie (security) | 2.1.5-2+deb8u6 | fixed | |
| ruby2.3 (PTS) | stretch | 2.3.3-1+deb9u2 | fixed |
| stretch (security) | 2.3.3-1+deb9u4 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| ruby1.8 | source | (unstable) | (unfixed) | medium | ||
| ruby1.8 | source | wheezy | 1.8.7.358-7.1+deb7u4 | medium | DLA-1113-1 | |
| ruby1.9.1 | source | (unstable) | (unfixed) | medium | ||
| ruby1.9.1 | source | wheezy | 1.9.3.194-8.1+deb7u6 | medium | DLA-1114-1 | |
| ruby2.1 | source | (unstable) | (unfixed) | medium | ||
| ruby2.1 | source | jessie | 2.1.5-2+deb8u4 | medium | DLA-1421-1 | |
| ruby2.3 | source | (unstable) | 2.3.5-1 | medium | 875936 | |
| ruby2.3 | source | stretch | 2.3.3-1+deb9u2 | medium | DSA-4031-1 |
https://github.com/mruby/mruby/issues/3722
https://www.ruby-lang.org/en/news/2017/09/14/sprintf-buffer-underrun-cve-2017-0898/
https://bugs.ruby-lang.org/issues/13499