CVE-2017-11465
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.68%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.68% probability · 76th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-125, CWE-787
- Affected
- ruby-lang/ruby
- Source
- cve@mitre.org
References
- https://bugs.ruby-lang.org/issues/13742Issue Tracking, Patch, Vendor Advisory
- https://bugs.ruby-lang.org/projects/ruby-trunk/repository/revisions/59344Issue Tracking, Patch, Vendor Advisory
- https://bugs.ruby-lang.org/issues/13742Issue Tracking, Patch, Vendor Advisory
- https://bugs.ruby-lang.org/projects/ruby-trunk/repository/revisions/59344Issue Tracking, Patch, Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.