THREATPORT/VULNERABILITY/CVE-2019-17498
HIGH SEVERITY

CVE-2019-17498

Libssh2 vulnerability

CVSS
8.1
EPSS
3.8%
EPSS pct
89th
Exploited
No known
In libssh2 v1.9.0 and earlier versions, the SSH_MSG_DISCONNECT logic in packet.c has an integer overflow in a bounds check, enabling an attacker to specify an arbitrary (out-of-bounds) offset for a subsequent memory read. A crafted SSH server may be able to disclose sensitive information or cause a denial of service condition 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:N/A:H
Weakness type (CWE)
  • CWE-190 — Integer Overflow or Wraparound
Published
2019-10-21

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 availability.

Its EPSS score of 3.8% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 89% of all scored CVEs.

Check your external exposure to CVE-2019-17498

  • Confirm whether Libssh2 Libssh2 is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2019-17498.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2019-17498

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2019-17498 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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