CVE-2012-6063

Double free vulnerability in the sftp_mkdir function in sftp.c in libssh before 0.5.3 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via unspecified vectors, a different vector than CVE-2012-4559.

Published: 2012-11-30 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2012-6063 is rated Moderate Risk (62.2/100): CVSS High severity, with medium exploitation likelihood (EPSS 3.58%). EPSS rose +1.45% over the last day, indicating growing attacker interest. Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2012-6063

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 2.14% 3.58% +1.45%
2 2025-03-30 5.72% 2.14% -3.58%
3 2025-03-29 — 5.72% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2012-6063

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2012-6063

OS Trackers for CVE-2012-6063

vendor priority summary link
debian not yet assigned CVE-2012-6063 not yet assigned priority: Debian including 1 source packages (libssh), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2012-6063
gentoo normal CVE-2012-6063: 1 GLSA(s) (201402-26), 1 atom(s) (net-libs/libssh); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2012-6063
ubuntu medium CVE-2012-6063 medium priority: Ubuntu including 1 source packages (libssh), 6 status rows across 6 suites (hardy, lucid, oneiric, precise, quantal, upstream): not-affected 4, ignored 1, needs-triage 1. https://ubuntu.com/security/CVE-2012-6063

Affected software / configurations for CVE-2012-6063

Vendor Product Version Raw CPE
libssh libssh <= 0.5.2 cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*
libssh libssh 0.4.7 cpe:2.3:a:libssh:libssh:0.4.7:*:*:*:*:*:*:*
libssh libssh 0.4.8 cpe:2.3:a:libssh:libssh:0.4.8:*:*:*:*:*:*:*
libssh libssh 0.5.0 cpe:2.3:a:libssh:libssh:0.5.0:*:*:*:*:*:*:*
libssh libssh 0.5.0 cpe:2.3:a:libssh:libssh:0.5.0:rc1:*:*:*:*:*:*
libssh libssh 0.5.1 cpe:2.3:a:libssh:libssh:0.5.1:*:*:*:*:*:*:*

References for CVE-2012-6063

cvelogic Threat Intelligence