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.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2017-11465 from the MITRE CVE dictionary dictionary and NIST NVD.
Red Hat Product Security has rated this issue as having Low security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
Additionally, the security impact of this flaw is disputed by the upstream Ruby project.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
| CVSS3 Base Score | 5.9 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Attack Vector | Network |
| Attack Complexity | High |
| Privileges Required | None |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity Impact | None |
| Availability Impact | High |
| Platform | Package | State |
|---|---|---|
| Red Hat Subscription Asset Manager 1 | ruby193-ruby | Not affected |
| Red Hat Software Collections for Red Hat Enterprise Linux | rh-ruby23-ruby | Not affected |
| Red Hat Software Collections for Red Hat Enterprise Linux | rh-ruby22-ruby | Not affected |
| Red Hat Software Collections for Red Hat Enterprise Linux | rh-ruby24-ruby | Will not fix |
| Red Hat Enterprise Linux 7 | ruby | Not affected |
| Red Hat Enterprise Linux 6 | ruby | Not affected |
| Red Hat Enterprise Linux 5 | ruby | Not affected |
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