Memory leak in QEMU

1) Memory leak

EUVDB-ID: #VU32082

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 - Missing release of memory after effective lifetime

Exploit availability: No

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

CPE2.3

• cpe:2.3:a:qemu:qemu:3.1.3:*:*:*:*:*:*:*

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

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.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to open a a specially crafted file.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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