CVE-2018-12617

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 v3.1

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

CVSS v2.0

5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS

25.05% chance of exploitation in the next 30 days, 98th percentile

Published

2018-06-21

Updated

2024-08-05

Proof-of-concept exploits (1)

• https://gist.github.com/fakhrizulkifli/c7740d28efa07dafee66d4da5d857ef6

ExploitDB entries (1)

• https://www.exploit-db.com/exploits/44925

References

• CVE Record
• NVD entry

Related

• CVE-2018-12613
• CVE-2018-1263
• CVE-2018-12611
• CVE-2018-12630
• CVE-2018-12610
• CVE-2018-12631