Bug 888759
| Summary: | unbound: unbound-anchor does not disable internal XML entity expansion | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Florian Weimer <fweimer> |
| Component: | unbound | Assignee: | Paul Wouters <pwouters> |
| Status: | CLOSED ERRATA | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 18 | CC: | atkac, pwouters |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | unbound-1.4.20-3.fc18 | Doc Type: | Bug Fix |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2013-01-05 06:58:45 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | |||
| Bug Blocks: | 888729 | ||
unbound-1.4.19-1.fc18 has been submitted as an update for Fedora 18. https://admin.fedoraproject.org/updates/unbound-1.4.19-1.fc18 unbound-1.4.19-1.fc17 has been submitted as an update for Fedora 17. https://admin.fedoraproject.org/updates/unbound-1.4.19-1.fc17 unbound-1.4.19-1.el6 has been submitted as an update for Fedora EPEL 6. https://admin.fedoraproject.org/updates/unbound-1.4.19-1.el6 Package unbound-1.4.19-1.fc18: * should fix your issue, * was pushed to the Fedora 18 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing unbound-1.4.19-1.fc18' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2012-20836/unbound-1.4.19-1.fc18 then log in and leave karma (feedback). unbound-1.4.19-1.fc17 has been pushed to the Fedora 17 stable repository. If problems still persist, please make note of it in this bug report. unbound-1.4.19-1.fc18 has been pushed to the Fedora 18 stable repository. If problems still persist, please make note of it in this bug report. unbound-1.4.19-1.el6 has been pushed to the Fedora EPEL 6 stable repository. If problems still persist, please make note of it in this bug report. unbound-1.4.20-6.fc19 has been submitted as an update for Fedora 19. https://admin.fedoraproject.org/updates/unbound-1.4.20-6.fc19 unbound-1.4.20-1.fc18 has been submitted as an update for Fedora 18. https://admin.fedoraproject.org/updates/unbound-1.4.20-1.fc18 unbound-1.4.20-7.fc19 has been submitted as an update for Fedora 19. https://admin.fedoraproject.org/updates/unbound-1.4.20-7.fc19 unbound-1.4.20-3.fc18 has been submitted as an update for Fedora 18. https://admin.fedoraproject.org/updates/unbound-1.4.20-3.fc18 unbound-1.4.20-3.fc18 has been pushed to the Fedora 18 stable repository. If problems still persist, please make note of it in this bug report. |
xml_parse_setup() does not disable XML entity expansion, technically introducing a denial-of-service issue ("billion laughs attack"). I say "technically" because the file is trusted and its signature is verified before parsing. But given that it was downloaded from the network, fixing this is still a good idea. Adding the following handler using XML_SetEntityDeclHandler(parser, EntityDeclHandler); should be sufficient to address this issue. // Stop the parser when an entity declaration is encountered. static void EntityDeclHandler(void *userData, const XML_Char *entityName, int is_parameter_entity, const XML_Char *value, int value_length, const XML_Char *base, const XML_Char *systemId, const XML_Char *publicId, const XML_Char *notationName) { XML_StopParser((XML_Parser)userData, XML_FALSE); }