parser.c in libxml2 before 2.9.5 does not prevent infinite recursion in parameter entities.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2017-16932 from the MITRE CVE dictionary dictionary and NIST NVD.
This issue affects the versions of rubygem-nokogiri as shipped with Red Hat Subscription Asset Manager 1.x. Red Hat Product Security has rated this issue as having Moderate security impact. A future update may address this issue. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
This issue affects the versions of libxml2 as shipped with Red Hat Enterprise Linux 5, 6, and 7. 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/.
This issue affects the versions of rubygem-nokogiri on CloudForms 5 as it uses the Red Hat Enterprise copy of libxml2 as shipped with Red Hat Enterprise Linux 7. 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/.
This issue affects the versions of rubygem-nokogiri on Satellite 6.0, 6.1 and 6.2 as it uses the Red Hat Enterprise copy of libxml2 as shipped with Red Hat Enterprise Linux 7. 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/. Please note that Satellite version 6.3 no longer ships rubygem-nokogir, but instead uses a version of rubygem-nokogiri from another software channel.
Red Hat Enterprise Linux 5 is now in Extended Life Cycle phase of the support and maintenance life cycle. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
Red Hat Enterprise Linux 6 is now in Production 3 Phase of the support and maintenance life cycle. This has been rated as having Moderate security impact and is not currently planned to be addressed in future updates. For additional information, refer to the Red Hat Enterprise Linux Life Cycle: https://access.redhat.com/support/policy/updates/errata/.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
| CVSS3 Base Score | 7.5 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| Attack Vector | Network |
| Attack Complexity | Low |
| 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-rubygem-nokogiri | Will not fix |
| Red Hat Software Collections for Red Hat Enterprise Linux | rh-ror42-rubygem-nokogiri | Not affected |
| Red Hat Software Collections for Red Hat Enterprise Linux | rh-ror50-rubygem-nokogiri | Not affected |
| Red Hat Software Collections for Red Hat Enterprise Linux | rh-passenger40-rubygem-nokogiri | Not affected |
| Red Hat Satellite 6 | ruby193-rubygem-nokogiri | Will not fix |
| Red Hat Satellite 6 | tfm-rubygem-nokogiri | Will not fix |
| Red Hat Enterprise MRG 2 | rubygem-nokogiri | Will not fix |
| Red Hat Enterprise Linux 7 | libxml2 | Will not fix |
| Red Hat Enterprise Linux 6 | libxml2 | Will not fix |
| Red Hat Enterprise Linux 5 | libxml2 | Will not fix |
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