| Summary: | <app-emulation/qemu-2.3.0-r2: pcnet: multi-tmd buffer overflow in the tx path (CVE-2015-3209) | ||
|---|---|---|---|
| Product: | Gentoo Security | Reporter: | Agostino Sarubbo <ago> |
| Component: | Vulnerabilities | Assignee: | Gentoo Security <security> |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | CC: | cardoe, qemu+disabled |
| Priority: | Normal | ||
| Version: | unspecified | ||
| Hardware: | All | ||
| OS: | Linux | ||
| URL: | https://bugzilla.redhat.com/show_bug.cgi?id=1225882 | ||
| See Also: | https://bugzilla.redhat.com/show_bug.cgi?id=1225882 | ||
| Whiteboard: | B2 [glsa cve] | ||
| Package list: | Runtime testing required: | --- | |
Commit message: Add fix from upstream for CVE-2015-3209 http://sources.gentoo.org/app-emulation/qemu/files/qemu-2.3.0-CVE-2015-3209.patch?rev=1.1 http://sources.gentoo.org/app-emulation/qemu/qemu-2.3.0-r2.ebuild?rev=1.1 CVE-2015-3209 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-3209): Heap-based buffer overflow in the PCNET controller in QEMU allows remote attackers to execute arbitrary code by sending a packet with TXSTATUS_STARTPACKET set and then a crafted packet with TXSTATUS_DEVICEOWNS set. fine stabilize the new version amd64 stable x86 stable. Maintainer(s), please cleanup. Security, please add it to the existing request, or file a new one. Arches, Thank you for your work. New GLSA Request filed. Maintainer(s), please drop the vulnerable version(s). Vulnerable versions have been removed. This issue was resolved and addressed in GLSA 201510-02 at https://security.gentoo.org/glsa/201510-02 by GLSA coordinator Kristian Fiskerstrand (K_F). |
From ${URL} : A flaw was found in the way QEMU's AMD PCnet Ethernet emulation handled multi-TMD packet with length above 4096 bytes. 4096 is the maximum length per TMD and it is also currently the size of the relay buffer pcnet driver uses for sending the packet data to QEMU for further processing. With packet spanning multiple TMDs it can happen that the overall packet size will be bigger than sizeof(buffer), which results in memory corruption. A privileged guest user in a guest with AMD PCNet ethernet card enabled could potentially use this flaw to execute arbitrary code on the host with the privileges of the hosting QEMU process. @maintainer(s): after the bump, in case we need to stabilize the package, please let us know if it is ready for the stabilization or not.