The (1) BMDMA and (2) AHCI HBA interfaces in the IDE functionality in QEMU 1.0 through 2.1.3 have multiple interpretations of a functions return value, which allows guest OS users to cause a host OS denial of service (memory consumption or infinite loop, and system crash) via a PRDT with zero complete sectors, related to the bmdma_prepare_buf and ahci_dma_prepare_buf functions.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Debian_linux | Debian | 8.0 (including) | 8.0 (including) |
| Qemu | Ubuntu | esm-infra-legacy/trusty | * |
| Qemu | Ubuntu | trusty | * |
| Qemu | Ubuntu | trusty/esm | * |
| Qemu | Ubuntu | upstream | * |
| Qemu | Ubuntu | utopic | * |
| Qemu-kvm | Ubuntu | lucid | * |
| Qemu-kvm | Ubuntu | precise | * |
References
- http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=3251bdcf1c67427d964517053c3d185b46e618e8
- http://openwall.com/lists/oss-security/2015/04/20/7
- http://www.debian.org/security/2015/dsa-3259
- http://www.securityfocus.com/bid/73316
- http://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=3251bdcf1c67427d964517053c3d185b46e618e8
- http://openwall.com/lists/oss-security/2015/04/20/7
- http://www.debian.org/security/2015/dsa-3259
- http://www.securityfocus.com/bid/73316