#VU32135 Resource management error in QEMU - CVE-2016-8910

Vulnerability identifier: #VU32135

Vulnerability risk: Low

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-8910

CWE-ID: CWE-399

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
QEMU
Client/Desktop applications / Virtualization software

Vendor: QEMU

Description

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

The rtl8139_cplus_transmit function in hw/net/rtl8139.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (infinite loop and CPU consumption) by leveraging failure to limit the ring descriptor count. <a href="http://cwe.mitre.org/data/definitions/835.html">CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')</a>

Mitigation
Install update from vendor's website.

Vulnerable software versions

QEMU: 3.1.3

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External links
https://lists.opensuse.org/opensuse-updates/2016-12/msg00140.html
https://www.openwall.com/lists/oss-security/2016/10/24/2
https://www.openwall.com/lists/oss-security/2016/10/24/5
https://www.securityfocus.com/bid/93844
https://access.redhat.com/errata/RHSA-2017:2392
https://access.redhat.com/errata/RHSA-2017:2408
https://lists.debian.org/debian-lts-announce/2018/11/msg00038.html
https://lists.gnu.org/archive/html/qemu-devel/2016-10/msg05495.html
https://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.