CVE-2012-4561

Libssh vulnerability

CVSS

5.0

EPSS

4.8%

EPSS pct

91th

Exploited

No known

The (1) publickey_make_dss, (2) publickey_make_rsa, (3) signature_from_string, (4) ssh_do_sign, and (5) ssh_sign_session_id functions in keys.c in libssh before 0.5.3 free "an invalid pointer on an error path," which might allow remote attackers to cause a denial of service (crash) via unspecified vectors.

Affected vendor

Libssh

Affected product

Libssh

CVSS vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Published

2012-11-30

Risk analysis

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

Its EPSS score of 4.8% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 91% of all scored CVEs.

Check your external exposure to CVE-2012-4561

Confirm whether Libssh Libssh is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2012-4561.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2012-4561

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