CVE-2018-12617

high-risk
Published 2018-06-21

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.

Do I need to act?

!
11.0% chance of exploitation in next 30 days
EPSS score — higher than 89% of all CVEs
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
!
1 public exploit available
44925
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (7)

Affected Vendors

Debian Canonical Qemu

References (16)

Third Party Advisory http://www.securityfocus.com/bid/104531
Exploit https://gist.github.com/fakhrizulkifli/c7740d28efa07dafee66d4da5d857ef6
Mailing List https://lists.debian.org/debian-lts-announce/2019/02/msg00041.html
Mailing List https://lists.gnu.org/archive/html/qemu-devel/2018-06/msg03385.html
Mailing List https://seclists.org/bugtraq/2019/May/76
Third Party Advisory https://usn.ubuntu.com/3826-1/
Third Party Advisory https://www.debian.org/security/2019/dsa-4454
Exploit https://www.exploit-db.com/exploits/44925/
Third Party Advisory http://www.securityfocus.com/bid/104531
Exploit https://gist.github.com/fakhrizulkifli/c7740d28efa07dafee66d4da5d857ef6
Mailing List https://lists.debian.org/debian-lts-announce/2019/02/msg00041.html
Mailing List https://lists.gnu.org/archive/html/qemu-devel/2018-06/msg03385.html
Mailing List https://seclists.org/bugtraq/2019/May/76
Third Party Advisory https://usn.ubuntu.com/3826-1/
Third Party Advisory https://www.debian.org/security/2019/dsa-4454
Exploit https://www.exploit-db.com/exploits/44925/
51
/ 100
high-risk
Severity 26/34 · High
Exploitability 11/34 · Low
Exposure 14/34 · Moderate