Vulnerability identifier: #VU32132

Vulnerability risk: Medium

CVSSv3.1: 5.5 [AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H/E:U/RL:U/RC:C]

CVE-ID: CVE-2016-8578

CWE-ID: CWE-476

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 a NULL pointer dereference error in fsdev/9p-iov-marshal.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (NULL pointer dereference and QEMU process crash) by sending an empty string parameter to a 9P operation. A remote attacker can perform a denial of service (DoS) 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://lists.opensuse.org/opensuse-updates/2016-12/msg00140.html
http://www.openwall.com/lists/oss-security/2016/10/10/14
http://www.openwall.com/lists/oss-security/2016/10/10/8
http://www.securityfocus.com/bid/93474
http://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
http://lists.gnu.org/archive/html/qemu-devel/2016-09/msg07143.html
http://security.gentoo.org/glsa/201611-11

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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.