THREATPORT/VULNERABILITY/CVE-2019-3857
HIGH SEVERITY

CVE-2019-3857

Libssh2 vulnerability

CVSS
8.8
EPSS
6.1%
EPSS pct
93th
Exploited
No known
An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way SSH_MSG_CHANNEL_REQUEST packets with an exit signal are parsed. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.
Affected vendor
Libssh2
Affected product
Libssh2
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-190 — Integer Overflow or Wraparound
  • CWE-787 — Out-of-bounds Write
Published
2019-03-25

Risk analysis

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

Its EPSS score of 6.1% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 93% of all scored CVEs.

Check your external exposure to CVE-2019-3857

  • Confirm whether Libssh2 Libssh2 is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2019-3857.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2019-3857

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2019-3857 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

Run a free external exposure scan

Are you exposed to CVE-2019-3857?

Run an instant, non-intrusive external scan to check your attack surface for CVE-2019-3857.

Start free scan

No credit card. Agentless.

Related vulnerabilities

HIGH
CVE-2009-0175
Mp3 Trackmaker vulnerability
HIGH
CVE-2009-0176
Blackberry Enterprise Server vulnerability
HIGH
CVE-2008-4388
Appstream Client vulnerability