CVE-2015-8743

Debian Security Advisory 3470-1

Severity Score

7.1

*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 NE2000 device emulation support is vulnerable to an OOB r/w access issue. It could occur while performing 'ioport' r/w operations. A privileged (CAP_SYS_RAWIO) user/process could use this flaw to leak or corrupt QEMU memory bytes.

QEMU (también conocido como Quick Emulator) construido con el soporte de emulación de dispositivo NE2000 es vulnerable a un problema de acceso OOB r/w. Podría ocurrir mientras se realizan operaciones 'ioport' r/w. Un usuario/proceso privilegiado (CAP_SYS_RAWIO) podría utilizar esta falla para filtrar o corromper los bytes de memoria QEMU.

Qinghao Tang discovered that QEMU incorrectly handled PCI MSI-X support. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 15.10. Lian Yihan discovered that QEMU incorrectly handled the VNC server. A remote attacker could use this issue to cause QEMU to crash, resulting in a denial of service. Various other issues were also addressed.

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-01-04 CVE Reserved
2016-02-03 CVE Published
2024-08-06 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-125: Out-of-bounds Read
CWE-787: Out-of-bounds Write

CAPEC

References (10)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2016/01/04/1	Mailing List
http://www.openwall.com/lists/oss-security/2016/01/04/2	Mailing List
http://www.securityfocus.com/bid/79820	Third Party Advisory
http://www.securitytracker.com/id/1034574	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1264929	Issue Tracking

URL	Date	SRC

URL	Date	SRC
https://lists.gnu.org/archive/html/qemu-devel/2016-01/msg00050.html	2020-10-29

URL	Date	SRC
http://www.debian.org/security/2016/dsa-3469	2020-10-29
http://www.debian.org/security/2016/dsa-3470	2020-10-29
http://www.debian.org/security/2016/dsa-3471	2020-10-29
https://security.gentoo.org/glsa/201602-01	2020-10-29

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 Search vendor "Qemu" for product "Qemu" and version " <= 2.5.1"		-		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