CVE-2018-12617 Information

Description

qmp_guest_file_read in qga/commands-posix.c and qga/commands-win32.c in qemu-ga (aka QEMU Guest Agent) in QEMU 2.12.50 has an integer overflow causing a g_malloc0() call to trigger a segmentation fault when trying to allocate a large memory chunk. The vulnerability can be exploited by sending a crafted QMP command (including guest-file-read with a large count value) to the agent via the listening socket.

CVSS Vector

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

Reference

http://www.securityfocus.com/bid/104531 https://gist.github.com/fakhrizulkifli/c7740d28efa07dafee66d4da5d857ef6 https://lists.debian.org/debian-lts-announce/2019/02/msg00041.html https://lists.gnu.org/archive/html/qemu-devel/2018-06/msg03385.html https://seclists.org/bugtraq/2019/May/76 https://usn.ubuntu.com/3826-1/ https://www.debian.org/security/2019/dsa-4454 https://www.exploit-db.com/exploits/44925/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5