#VU32092 Heap-based buffer overflow in QEMU - CVE-2017-5931

Vulnerability identifier: #VU32092

Vulnerability risk: High

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2017-5931

CWE-ID: CWE-122

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
QEMU
Client/Desktop applications / Virtualization software

Vendor: QEMU

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in Integer overflow in hw/virtio/virtio-crypto.c in QEMU (aka Quick Emulator). A remote attacker can use a crafted virtio-crypto request to trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

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
https://git.qemu-project.org/?p=qemu.git;a=commit;h=a08aaff811fb194950f79711d2afe5a892ae03a4
https://www.openwall.com/lists/oss-security/2017/02/08/2
https://www.securityfocus.com/bid/96141
https://bugzilla.redhat.com/show_bug.cgi?id=1420092
https://lists.nongnu.org/archive/html/qemu-devel/2017-01/msg01368.html
https://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.