CVE-2018-12617
HIGH severity · CVSS 7.5 · Integer overflow
7.5CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)25%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://lists.gnu.org/archive/html/qemu-devel/2018-06/msg03385.html ↗
Additional information
- NVD record
- https://lists.gnu.org/archive/html/qemu-devel/2018-06/msg03385.htmlPatch
- http://www.securityfocus.com/bid/104531Advisory
- https://lists.debian.org/debian-lts-announce/2019/02/msg00041.htmlAdvisory
- https://seclists.org/bugtraq/2019/May/76Advisory
- https://usn.ubuntu.com/3826-1/Advisory
- https://www.debian.org/security/2019/dsa-4454Advisory
- https://gist.github.com/fakhrizulkifli/c7740d28efa07dafee66d4da5d857ef6Advisory
- https://www.exploit-db.com/exploits/44925/Advisory