Infinite loop in qemu (Alpine package)

1) Infinite loop

EUVDB-ID: #VU33055

Risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-6505

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

Description

The vulnerability allows a local authenticated user to a crash the entire system.

The ohci_service_ed_list function in hw/usb/hcd-ohci.c in QEMU (aka Quick Emulator) before 2.9.0 allows local guest OS users to cause a denial of service (infinite loop) via vectors involving the number of link endpoint list descriptors, a different vulnerability than CVE-2017-9330.

Mitigation

Install update from vendor's website.

Vulnerable software versions

qemu (Alpine package): 2.1.2-r0 - 2.8.1-r1

External links

http://git.alpinelinux.org/aports/commit/?id=4fd42213196834bf5e7a33f83e9e6775606a9aba

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.