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Sid 1-34485

Message

OS-OTHER QEMU floppy disk controller buffer overflow attempt

Summary

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) FDCMDREADID, (2) FDCMDDRIVESPECIFICATION_COMMAND, or other unspecified commands, aka VENOM.

Impact

CVSS base score 7.7 CVSS impact score 10.0 CVSS exploitability score 5.1 confidentialityImpact COMPLETE integrityImpact COMPLETE availabilityImpact COMPLETE

CVE-2015-3456:

CVSS base score 7.7

CVSS impact score 10.0

CVSS exploitability score 5.1

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

Detailed information

CVE-2015-3456: 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) FDCMDREADID, (2) FDCMDDRIVESPECIFICATION_COMMAND, or other unspecified commands, aka VENOM.

Affected systems

  • qemu qemu 2.3.0
  • redhat enterprise_virtualization 3.0
  • redhat openstack 4.0
  • redhat openstack 5.0
  • redhat openstack 6.0
  • redhat openstack 7.0
  • redhat enterprise_linux 5
  • redhat enterprise_linux 6
  • redhat enterprise_linux 7.0
  • xen xen 4.5.0

Ease of attack

CVE-2015-3456:

Access Vector ADJACENT_NETWORK

Access Complexity LOW

Authentication SINGLE

False positives

None known

False negatives

None known

Corrective action

Upgrade to the latest non-affected version of the software.

Apply the appropriate vendor supplied patches.

Contributors

  • Talos research team.
  • This document was generated from data supplied by the national vulnerability database, a product of the national institute of standards and technology.
  • For more information see nvd.

Additional References

  • osvdb.org/show/osvdb/122072