Integer overflow in the net_tx_pkt_init function in hw/net/net_tx_pkt.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (QEMU process crash) via the maximum fragmentation count, which triggers an unchecked multiplication and NULL pointer dereference.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2016-6888 from the MITRE CVE dictionary dictionary and NIST NVD.
| Base Score | 2.3 |
|---|---|
| Base Metrics | AV:A/AC:M/Au:S/C:N/I:N/A:P |
| Access Vector | Adjacent Network |
| Access Complexity | Medium |
| Authentication | Single |
| Confidentiality Impact | None |
| Integrity Impact | None |
| Availability Impact | Partial |
| CVSS3 Base Score | 3.5 |
|---|---|
| CVSS3 Base Metrics | CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
| Attack Vector | Adjacent Network |
| Attack Complexity | Low |
| Privileges Required | Low |
| User Interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity Impact | None |
| Availability Impact | Low |
Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).
| Platform | Errata | Release Date |
|---|---|---|
| Red Hat OpenStack Platform 8.0 (Liberty) (qemu-kvm-rhev) | RHSA-2017:2408 | 2017-08-01 |
| Red Hat OpenStack Platform 11.0 (Ocata) (qemu-kvm-rhev) | RHSA-2017:2408 | 2017-08-01 |
| Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts (qemu-kvm-rhev) | RHSA-2017:2392 | 2017-08-01 |
| Red Hat OpenStack Platform 10 (qemu-kvm-rhev) | RHSA-2017:2408 | 2017-08-01 |
| Red Hat Enterprise Linux OpenStack Platform 7.0 (Kilo) for RHEL 7 (qemu-kvm-rhev) | RHSA-2017:2408 | 2017-08-01 |
| Red Hat Enterprise Linux OpenStack Platform 6.0 (Juno) for RHEL 7 (qemu-kvm-rhev) | RHSA-2017:2408 | 2017-08-01 |
| Red Hat OpenStack Platform 9.0 (qemu-kvm-rhev) | RHSA-2017:2408 | 2017-08-01 |
| Platform | Package | State |
|---|---|---|
| Red Hat Enterprise Linux OpenStack Platform 5.0 (Icehouse) | qemu-kvm-rhev | Will not fix |
| Red Hat Enterprise Linux 7 | qemu-kvm | Will not fix |
| Red Hat Enterprise Linux 6 | qemu-kvm | Not affected |
| Red Hat Enterprise Linux 5 | xen | Not affected |
| Red Hat Enterprise Linux 5 | kvm | Not affected |
Vulmon