THREATPORT/VULNERABILITY/CVE-2018-12617
HIGH SEVERITY

CVE-2018-12617

Qemu vulnerability

CVSS
7.5
EPSS
25.3%
EPSS pct
98th
Exploited
No known
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.
Affected vendor
Qemu
Affected product
Qemu
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness type (CWE)
  • CWE-190 — Integer Overflow or Wraparound
Published
2018-06-21

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 25.3% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 98% of all scored CVEs.

Check your external exposure to CVE-2018-12617

  • Confirm whether Qemu Qemu is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2018-12617.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2018-12617

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2018-12617 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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