REDHAT-BUG-1643089

First published: Thu Oct 25 2018(Updated: )

Array#pack method converts the receiver’s contents into a string with specified format. If the receiver contains some tainted objects, the returned string also should be tainted. String#unpack method which converts the receiver into an array also should propagate its tainted flag to the objects contained in the returned array. But, with B, b, H and h directives, the tainted flags are not propagated. So, if a script processes unreliable inputs by Array#pack and/or String#unpack with these directives and checks the reliability with tainted flags, the check might be wrong. External References: <a href="https://www.ruby-lang.org/en/news/2018/10/17/not-propagated-taint-flag-in-some-formats-of-pack-cve-2018-16396/">https://www.ruby-lang.org/en/news/2018/10/17/not-propagated-taint-flag-in-some-formats-of-pack-cve-2018-16396/</a>

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

• agent/references
• agent/type
• agent/last-modified-date
• collector/redhat-bugzilla
• source/Red Hat
• alias/CVE-2018-16396
• agent/first-publish-date
• agent/source
• agent/severity
• agent/description
• agent/event
• agent/softwarecombine
• agent/tags
• agent/guess-ai
• agent/software-canonical-lookup
• agent/software-canonical-lookup-request
• vendor/ruby
• canonical/ruby