| Name | CVE-2014-9718 |
| Description | 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 function's 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-3259-1 |
| Debian Bugs | 781250 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| qemu (PTS) | buster | 1:3.1+dfsg-8+deb10u8 | fixed |
| buster (security) | 1:3.1+dfsg-8+deb10u12 | fixed |
| bullseye | 1:5.2+dfsg-11+deb11u3 | fixed |
| bullseye (security) | 1:5.2+dfsg-11+deb11u2 | fixed |
| bookworm | 1:7.2+dfsg-7+deb12u5 | fixed |
| trixie | 1:8.2.1+ds-2 | fixed |
| sid | 1:8.2.2+ds-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| qemu | source | jessie | 1:2.1+dfsg-12 | | DSA-3259-1 | |
| qemu | source | (unstable) | 1:2.3+dfsg-1 | unimportant | | 781250 |
| qemu-kvm | source | (unstable) | (unfixed) | unimportant | | |
Notes
[wheezy] - qemu <postponed> (Can be fixed along in later update)
[wheezy] - qemu-kvm <postponed> (Can be fixed along in later update)
http://git.qemu.org/?p=qemu.git;a=commitdiff;h=3251bdcf1c67427d964517053c3d185b46e618e8 (v2.2.0-rc2)
https://www.openwall.com/lists/oss-security/2015/03/24/4
Per maintainer not a security issue:
Qemu either leaks memory or loops infinitely. Memory leakage can be easily
mitigated using some kind of resource limits in security-sensitive environments,
and looping can trivially be done inside the virtual machine just fine, achieving
the same effect