In libxml2 2.11 before 2.11.9, 2.12 before 2.12.9, and 2.13 before 2.13.3, the SAX parser can produce events for external entities even if custom SAX handlers try to override entity content (by setting checked). This makes classic XXE attacks possible.
Weakness
The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Libxml2 | Xmlsoft | 2.11.0 (including) | 2.11.9 (excluding) |
| Libxml2 | Xmlsoft | 2.12.0 (including) | 2.12.9 (excluding) |
| Libxml2 | Xmlsoft | 2.13.0 (including) | 2.13.3 (excluding) |
| Red Hat Enterprise Linux 10 | RedHat | libxml2-0:2.12.5-5.el10_0 | * |
| Libxml2 | Ubuntu | oracular | * |
| Libxml2 | Ubuntu | upstream | * |