CVE-2015-8701

Severity Score

6.5

*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 Rocker switch emulation support is vulnerable to an off-by-one error. It happens while processing transmit (tx) descriptors in 'tx_consume' routine, if a descriptor was to have more than allowed (ROCKER_TX_FRAGS_MAX=16) fragments. A privileged user inside guest could use this flaw to cause memory leakage on the host or crash the QEMU process instance resulting in DoS issue.

QEMU (también conocido como Quick Emulator) construido con el soporte de emulación switch Rocker es vulnerable a un error off-by-one. Sucede mientras se procesan los descriptores de transmisión (tx) en rutina 'tx_consume', si un descriptor debía tener más fragmentos (ROCKER_TX_FRAGS_MAX=16) de los permitidos. Un usuario privilegiado dentro del huésped podría usar esta falla para provocar fuga de memoria en el host o bloquear la instacia de proceso QEMU resultando en un problema de DoS.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2015-12-29 CVE Reserved
2016-02-04 CVE Published
2023-03-08 EPSS Updated
2024-08-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-193: Off-by-one Error

CAPEC

References (6)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2015/12/28/6	Mailing List
http://www.openwall.com/lists/oss-security/2015/12/29/1	Mailing List
http://www.securityfocus.com/bid/79706	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1286971	Issue Tracking

URL	Date	SRC

URL	Date	SRC
https://lists.gnu.org/archive/html/qemu-devel/2015-12/msg04629.html	2020-11-10

URL	Date	SRC
https://security.gentoo.org/glsa/201602-01	2020-11-10

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