[DRE-maint] Bug#911920: ruby2.5: CVE-2018-16396: Tainted flags are not propagated in Array#pack and String#unpack with some directives

[Salvatore Bonaccorso]

Source: ruby2.5
Version: 2.5.1-6
Severity: grave
Tags: patch security upstream
Justification: user security hole

Hi,

The following vulnerability was published for ruby2.5.

CVE-2018-16396[0]:
Tainted flags are not propagated in Array#pack and String#unpack with some directives

If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2018-16396
    https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16396
[1] https://www.ruby-lang.org/en/news/2018/10/17/not-propagated-taint-flag-in-some-formats-of-pack-cve-2018-16396/

Regards,
Salvatore