Type confusion exists in _cancel_eval Ruby's TclTkIp class method. Attacker passing different type of object than String as "retval" argument can cause arbitrary code execution.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2016-2337 from the MITRE CVE dictionary dictionary and NIST NVD.
Red Hat Product Security has rated this issue as having Moderate 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/.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
| CVSS3 Base Score | 7 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| Attack Vector | Local |
| Attack Complexity | High |
| Privileges Required | Low |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity Impact | High |
| Availability Impact | High |
| Platform | Package | State |
|---|---|---|
| Red Hat Software Collections for Red Hat Enterprise Linux | rh-ruby23-ruby | Will not fix |
| Red Hat Software Collections for Red Hat Enterprise Linux | ruby200-ruby | Will not fix |
| Red Hat Software Collections for Red Hat Enterprise Linux | rh-ruby22-ruby | Will not fix |
| Red Hat Enterprise Linux 7 | ruby | Will not fix |
| Red Hat Enterprise Linux 6 | ruby | Will not fix |
| Red Hat Enterprise Linux 5 | ruby | Will not fix |
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