THREATPORT/VULNERABILITY/CVE-2019-15681
HIGH SEVERITY

CVE-2019-15681

Libvncserver vulnerability

CVSS
7.5
EPSS
3.3%
EPSS pct
87th
Exploited
No known
LibVNC commit before d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a contains a memory leak (CWE-655) in VNC server code, which allow an attacker to read stack memory and can be abused for information disclosure. Combined with another vulnerability, it can be used to leak stack memory and bypass ASLR. This attack appear to be exploitable via network connectivity. These vulnerabilities have been fixed in commit d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a.
Affected vendor
Libvnc Project
Affected product
Libvncserver
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness type (CWE)
  • CWE-665 — Improper Initialization
Published
2019-10-29

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 confidentiality.

Its EPSS score of 3.3% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 87% of all scored CVEs.

Check your external exposure to CVE-2019-15681

  • Confirm whether Libvnc Project Libvncserver is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2019-15681.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2019-15681

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2019-15681 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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