CVE-2015-8701 Information

Description

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.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Reference

http://www.openwall.com/lists/oss-security/2015/12/28/6 http://www.openwall.com/lists/oss-security/2015/12/29/1 http://www.securityfocus.com/bid/79706 https://bugzilla.redhat.com/show_bug.cgi?id=1286971 https://lists.gnu.org/archive/html/qemu-devel/2015-12/msg04629.html https://security.gentoo.org/glsa/201602-01

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.5