| Name | CVE-2018-8778 |
| Description | In Ruby before 2.2.10, 2.3.x before 2.3.7, 2.4.x before 2.4.4, 2.5.x before 2.5.1, and 2.6.0-preview1, an attacker controlling the unpacking format (similar to format string vulnerabilities) can trigger a buffer under-read in the String#unpack method, resulting in a massive and controlled information disclosure. |
| 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-1358-1, DLA-1359-1, DLA-1421-1, DSA-4259-1 |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| ruby1.8 | source | wheezy | 1.8.7.358-7.1+deb7u6 | DLA-1359-1 | ||
| ruby1.8 | source | (unstable) | (unfixed) | |||
| ruby1.9.1 | source | wheezy | 1.9.3.194-8.1+deb7u8 | DLA-1358-1 | ||
| ruby1.9.1 | source | (unstable) | (unfixed) | |||
| ruby2.1 | source | jessie | 2.1.5-2+deb8u4 | DLA-1421-1 | ||
| ruby2.1 | source | (unstable) | (unfixed) | |||
| ruby2.3 | source | stretch | 2.3.3-1+deb9u3 | DSA-4259-1 | ||
| ruby2.3 | source | (unstable) | (unfixed) | |||
| ruby2.5 | source | (unstable) | 2.5.1-1 |
https://www.ruby-lang.org/en/news/2018/03/28/buffer-under-read-unpack-cve-2018-8778/
https://hackerone.com/reports/298246
Fixed by: https://github.com/ruby/ruby/commit/d02b7bd864706fc2a40d83fb6014772ad3cc3b80
Fixed by: https://github.com/ruby/ruby/commit/4cd92d7b13002161a3452a0fe278b877901a8859 (2.2.10)