Vulnerability identifier: #VU32082

Vulnerability risk: Medium

CVSSv3.1: 6 [AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2017-5578

CWE-ID: CWE-401

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
QEMU
Client/Desktop applications / Virtualization software

Vendor: QEMU

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the virtio_gpu_resource_attach_backing function in hw/display/virtio-gpu.c in QEMU (aka Quick Emulator) allows local guest OS users to cause a denial of service (host memory consumption) via a large number of VIRTIO_GPU_CMD_RESOURCE_ATTACH_BACKING commands. A remote attacker can perform a denial of service attack.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

QEMU: 3.1.3

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External links
http://git.qemu.org/?p=qemu.git;a=commit;h=204f01b30975923c64006f8067f0937b91eea68b
http://www.openwall.com/lists/oss-security/2017/01/23/3
http://www.openwall.com/lists/oss-security/2017/01/25/2
http://www.securityfocus.com/bid/95781
http://security.gentoo.org/glsa/201702-28

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.