| Summary: | CVE-2013-4375 xen: qemu disk backend (qdisk) resource leak (XSA-71) | ||
|---|---|---|---|
| Product: | [Other] Security Response | Reporter: | Vincent Danen <vdanen> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED NOTABUG | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | unspecified | CC: | acathrow, areis, drjones, ehabkost, gleb, imammedo, knoel, minovotn, mrezanin, mtosatti, pbonzini, pfrields, pmatouse, rhod, security-response-team |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2013-09-26 16:54:06 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Bug Depends On: | 1017843, 1017844, 1017845 | ||
| Bug Blocks: | 1012558 | ||
Statement: Not vulnerable. This issue does not affect the versions of the xen package as shipped with Red Hat Enterprise Linux 5 as it does not provide support for the qdisk PV backend. This issue does not affect the versions of qemu-kvm as shipped with Red Hat Enterprise Linux 6 as they did not include the upstream commit that introduced this flaw. This issue does not affect Red Hat Enterprise MRG 2. External Reference: http://xenbits.xen.org/xsa/advisory-71.html Created xen tracking bugs for this issue: Affects: fedora-all [bug 1017843] Created qemu tracking bugs for this issue: Affects: fedora-all [bug 1017844] xen-4.2.3-4.fc18 has been pushed to the Fedora 18 stable repository. If problems still persist, please make note of it in this bug report. xen-4.2.3-4.fc19 has been pushed to the Fedora 19 stable repository. If problems still persist, please make note of it in this bug report. |
The qdisk PV disk backend in the qemu-xen flavour of qemu ("upstream qemu") can be influenced by a malicious frontend to leak mapped grant references. A malicious HVM guest can cause the backend domain to run out of grant references, leading to a DoS for any other domain which shares that driver domain. Acknowledgements: Red Hat would like to thank the Xen project for reporting this issue.