In Apache Xerces-C XML Parser library before 3.2.1, processing of external DTD paths can result in a null pointer dereference under certain conditions.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2017-12627 from the MITRE CVE dictionary dictionary and NIST NVD.
Red Hat Enterprise MRG and MRG-Messaging are currently in Maintenance phase. This issue has been rated as having Moderate security impact, and is not currently planned to be addressed in future releases of MRG or MRG-Messaging. For more information, refer to the Issue Severity Classification and the Life Cycle and Update Policies:
https://access.redhat.com/security/updates/classification
https://access.redhat.com/support/policy/update_policies/
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 Enterprise MRG 3 | xerces-c | Will not fix |
| Red Hat Enterprise MRG 2 | xerces-c | Will not fix |
| Red Hat Enterprise Linux 7 | xerces-c | Affected |
| Red Hat Enterprise Linux 6 | xerces-c | Affected |
Applications should strongly consider blocking remote entity resolution and/or outright disabling of DTD processing in light of the continued identification of bugs in this area of the library.
Vulmon