A flaw in libxml2 allows remote XML entity inclusion with default parser flags (i.e., when the caller did not request entity substitution, DTD validation, external DTD subset loading, or default DTD attributes). Depending on the context, this may expose a higher-risk attack surface in libxml2 not usually reachable with default parser flags, and expose content from local files, HTTP, or FTP servers (which might be otherwise unreachable).
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.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Libxml2 | Xmlsoft | * | 2.9.4 (including) |
| Libxml2 | Ubuntu | esm-infra-legacy/trusty | * |
| Libxml2 | Ubuntu | esm-infra/xenial | * |
| Libxml2 | Ubuntu | trusty | * |
| Libxml2 | Ubuntu | trusty/esm | * |
| Libxml2 | Ubuntu | upstream | * |
| Libxml2 | Ubuntu | xenial | * |
| Libxml2 | Ubuntu | yakkety | * |
| Libxml2 | Ubuntu | zesty | * |