THREATPORT/VULNERABILITY/CVE-2012-4559
MEDIUM SEVERITY

CVE-2012-4559

Libssh vulnerability

CVSS
6.8
EPSS
5.2%
EPSS pct
92th
Exploited
No known
Multiple double free vulnerabilities in the (1) agent_sign_data function in agent.c, (2) channel_request function in channels.c, (3) ssh_userauth_pubkey function in auth.c, (4) sftp_parse_attr_3 function in sftp.c, and (5) try_publickey_from_file function in keyfiles.c in libssh before 0.5.3 allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unspecified vectors.
Affected vendor
Libssh
Affected product
Libssh
CVSS vector
AV:N/AC:M/Au:N/C:P/I:P/A:P
Weakness type (CWE)
Published
2012-11-30

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 confidentiality, partial impact to integrity, partial impact to availability.

Its EPSS score of 5.2% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 92% of all scored CVEs.

Check your external exposure to CVE-2012-4559

  • Confirm whether Libssh Libssh is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2012-4559.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2012-4559

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2012-4559 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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