THREATPORT/VULNERABILITY/CVE-2013-0176
MEDIUM SEVERITY

CVE-2013-0176

Libssh vulnerability

CVSS
4.3
EPSS
3.0%
EPSS pct
86th
Exploited
No known
The publickey_from_privatekey function in libssh before 0.5.4, when no algorithm is matched during negotiations, allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a "Client: Diffie-Hellman Key Exchange Init" packet.
Affected vendor
Libssh
Affected product
Libssh
CVSS vector
AV:N/AC:M/Au:N/C:N/I:N/A:P
Weakness type (CWE)
Published
2013-02-05

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, medium attack complexity, requiring no authentication. Successful exploitation leads to partial impact to availability.

Its EPSS score of 3.0% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 86% of all scored CVEs.

Check your external exposure to CVE-2013-0176

  • Confirm whether Libssh Libssh is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2013-0176.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2013-0176

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2013-0176 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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Are you exposed to CVE-2013-0176?

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