THREATPORT/VULNERABILITY/CVE-2017-7539
MEDIUM SEVERITY

CVE-2017-7539

Qemu vulnerability

CVSS
5.3
EPSS
5.5%
EPSS pct
92th
Exploited
No known
An assertion-failure flaw was found in Qemu before 2.10.1, in the Network Block Device (NBD) server's initial connection negotiation, where the I/O coroutine was undefined. This could crash the qemu-nbd server if a client sent unexpected data during connection negotiation. A remote user or process could use this flaw to crash the qemu-nbd server resulting in denial of service.
Affected vendor
Qemu
Affected product
Qemu
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness type (CWE)
  • CWE-617 — Reachable Assertion
  • CWE-20 — Improper Input Validation
Published
2018-07-26

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 low impact to availability.

Its EPSS score of 5.5% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 92% of all scored CVEs.

Check your external exposure to CVE-2017-7539

  • Confirm whether Qemu Qemu is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2017-7539.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2017-7539

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2017-7539 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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