Bug 1473720 - (CVE-2017-11465) CVE-2017-11465 ruby: Invalid read/write in parser_yyerror function in UTF-8 parser
CVE-2017-11465 ruby: Invalid read/write in parser_yyerror function in UTF-8 p...
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
All Linux
low Severity low
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Assigned To: Red Hat Product Security
: Security
Depends On: 1473721
Blocks: 1473724
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Reported: 2017-07-21 09:46 EDT by Adam Mariš
Modified: 2017-07-31 18:37 EDT (History)
30 users (show)

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Description Adam Mariš 2017-07-21 09:46:58 EDT
The parser_yyerror function in the UTF-8 parser in Ruby 2.4.1 allows attackers to cause a denial of service (invalid write or read) or possibly have unspecified other impact via a crafted Ruby script, related to the parser_tokadd_utf8 function in parse.y. NOTE: this might have security relevance as a bypass of a $SAFE protection mechanism.

Upstream bug:

Comment 1 Adam Mariš 2017-07-21 09:47:34 EDT
Created ruby tracking bugs for this issue:

Affects: fedora-all [bug 1473721]
Comment 2 Vít Ondruch 2017-07-24 05:07:17 EDT
This is not vulnerability according to upstream [1]:

Note that this is not a vulnerability.
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-11465 is invalid.

[1] https://bugs.ruby-lang.org/issues/13742#note-3
Comment 4 Stefan Cornelius 2017-07-25 06:01:09 EDT
Lowering impact because this is disputed upstream. Unfortunately, I've not been able to reproduce this issue myself yet, so I can't say if the dispute is correct.

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