In the Loofah gem through 2.2.0 for Ruby, non-whitelisted HTML attributes may occur in sanitized output by republishing a crafted HTML fragment.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2018-8048 from the MITRE CVE dictionary dictionary and NIST NVD.
This issue affects the versions of rubygem-loofah as shipped with Red Hat CloudForms 4. Red Hat Product Security has rated this issue as having a security impact of Moderate. This vulnerability won't be fixed on CloudForms 4, because it uses libxml 2.9.1 and since the vulnerability requires a libxml >= 2.9.2 in order to be exploitable. 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 | 6.1 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | None |
| User Interaction | Required |
| Scope | Changed |
| Confidentiality | Low |
| Integrity Impact | Low |
| Availability Impact | None |
| Platform | Package | State |
|---|---|---|
| Red Hat Software Collections for Red Hat Enterprise Linux | rh-ror50-rubygem-loofah | Not affected |
| Red Hat Software Collections for Red Hat Enterprise Linux | rh-ror42-rubygem-loofah | Not affected |
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