CVE-2016-1981

Qemu: net: e1000 infinite loop in start_xmit and e1000_receive_iov routines

Severity Score

5.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

QEMU (aka Quick Emulator) built with the e1000 NIC emulation support is vulnerable to an infinite loop issue. It could occur while processing data via transmit or receive descriptors, provided the initial receive/transmit descriptor head (TDH/RDH) is set outside the allocated descriptor buffer. A privileged user inside guest could use this flaw to crash the QEMU instance resulting in DoS.

QEMU (también conocido como Quick Emulator) construido con el soporte de emulación e1000 NIC es vulnerable a un problema de bucle infinito. Podría ocurrir mientras se procesan datos a través de descriptores de transmisión o recepción, siempre que la cabeza inicial del descriptor de recepción/transmisión (TDH/RDH) se establezca fuera del búfer de descriptor asignado. Un usuario privilegiado dentro del huésped podría utilizar esta falla para bloquear la instancia de QEMU resultando en DoS.

An infinite loop flaw was found in the way QEMU's e1000 NIC emulation implementation processed data using transmit or receive descriptors under certain conditions. A privileged user inside a guest could use this flaw to crash the QEMU instance.

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

Attack Vector

Adjacent

Attack Complexity

Medium

Authentication

Single

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-01-21 CVE Reserved
2016-02-03 CVE Published
2023-03-08 EPSS Updated
2024-08-05 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

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

CAPEC

References (11)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2016/01/19/10	Mailing List
http://www.openwall.com/lists/oss-security/2016/01/22/1	Mailing List
http://www.securityfocus.com/bid/81549	Third Party Advisory

URL	Date	SRC

URL	Date	SRC
https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg03454.html	2023-02-12

URL	Date	SRC
http://rhn.redhat.com/errata/RHSA-2016-2585.html	2023-02-12
http://www.debian.org/security/2016/dsa-3469	2023-02-12
http://www.debian.org/security/2016/dsa-3470	2023-02-12
http://www.debian.org/security/2016/dsa-3471	2023-02-12
https://bugzilla.redhat.com/show_bug.cgi?id=1298570	2016-11-03
https://security.gentoo.org/glsa/201604-01	2023-02-12
https://access.redhat.com/security/cve/CVE-2016-1981	2016-11-03

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Qemu Search vendor "Qemu"		Qemu Search vendor "Qemu" for product "Qemu"				<= 2.5.1.1 Search vendor "Qemu" for product "Qemu" and version " <= 2.5.1.1"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				7.0 Search vendor "Debian" for product "Debian Linux" and version "7.0"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				8.0 Search vendor "Debian" for product "Debian Linux" and version "8.0"		-		Affected