CVE-2015-3456
Description
The Floppy Disk Controller (FDC) in QEMU, as used in Xen 4.5.x and earlier and KVM, allows local guest users to cause a denial of service (out-of-bounds write and guest crash) or possibly execute arbitrary code via the (1) FD_CMD_READ_ID, (2) FD_CMD_DRIVE_SPECIFICATION_COMMAND, or other unspecified commands, aka VENOM.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Exploits
Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.
Exploit-DB
QEMU - Floppy Disk Controller (FDC) (PoC)
OS impact
Red Hat Affected 3 releases
| Version | Status | Fixed in |
|---|---|---|
| 7.0 | Affected | — |
| 6.0 | Affected | — |
| 5 | Affected | — |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 1:2.3+dfsg-3 |
| sid | Fixed | 1:2.3+dfsg-3 |
| forky | Fixed | 1:2.3+dfsg-3 |
| bullseye | Fixed | 1:2.3+dfsg-3 |
| bookworm | Fixed | 1:2.3+dfsg-3 |
References
- http://git.qemu.org/?p=qemu.git%3Ba=commitdiff%3Bh=e907746266721f305d67bc0718795fedee2e824c
- http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10693
- http://lists.fedoraproject.org/pipermail/package-announce/2015-May/158072.html
- http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00009.html
- http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00013.html
- http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00014.html
- http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00018.html
- http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00019.html
- http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00021.html
- http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00042.html
- http://lists.opensuse.org/opensuse-security-announce/2015-06/msg00001.html
- http://lists.opensuse.org/opensuse-updates/2015-08/msg00021.html
- http://marc.info/?l=bugtraq&m=143229451215900&w=2
- http://marc.info/?l=bugtraq&m=143387998230996&w=2
- http://rhn.redhat.com/errata/RHSA-2015-0998.html
- http://rhn.redhat.com/errata/RHSA-2015-0999.html
- http://rhn.redhat.com/errata/RHSA-2015-1000.html
- http://rhn.redhat.com/errata/RHSA-2015-1001.html
- http://rhn.redhat.com/errata/RHSA-2015-1002.html
- http://rhn.redhat.com/errata/RHSA-2015-1003.html
- http://rhn.redhat.com/errata/RHSA-2015-1004.html
- http://rhn.redhat.com/errata/RHSA-2015-1011.html
- http://support.citrix.com/article/CTX201078
- http://venom.crowdstrike.com/
- http://www.debian.org/security/2015/dsa-3259
CWEs
CWE-119
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.