THREATPORT/VULNERABILITY/CVE-2015-3146
HIGH SEVERITY

CVE-2015-3146

Libssh vulnerability

CVSS
7.5
EPSS
3.9%
EPSS pct
89th
Exploited
No known
The (1) SSH_MSG_NEWKEYS and (2) SSH_MSG_KEXDH_REPLY packet handlers in package_cb.c in libssh before 0.6.5 do not properly validate state, which allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a crafted SSH packet.
Affected vendor
Libssh
Affected product
Libssh
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2016-04-13

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 3.9% 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-2015-3146

  • Confirm whether Libssh Libssh is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2015-3146.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2015-3146

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2015-3146 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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