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CVE-2012-6063

26
FAUCET Score

CVE-2012-6063 is a double free vulnerability in the sftp_mkdir function of libssh versions prior to 0.5.3. This flaw allows remote attackers to trigger a denial of service (crash) and potentially execute arbitrary code. With a CVSS score of 7.5, it is considered highly severe, requiring no authentication or complex attack vectors for exploitation, and could lead to partial confidentiality, integrity, and availability compromise. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.5.2CPE matchmatch criteria
cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*
0.4.7CPE matchmatch criteria
cpe:2.3:a:libssh:libssh:0.4.7:*:*:*:*:*:*:*
0.4.8CPE matchmatch criteria
cpe:2.3:a:libssh:libssh:0.4.8:*:*:*:*:*:*:*
0.5.0CPE matchmatch criteria
cpe:2.3:a:libssh:libssh:0.5.0:*:*:*:*:*:*:*
0.5.0CPE matchmatch criteria
cpe:2.3:a:libssh:libssh:0.5.0:rc1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.58%
Probability of exploitation in next 30 days
EPSS Percentile
88.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0358 is in the 79th percentile among its peer group of 51,466 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

git.libssh.org / projects/libssh.git/commit
bugzilla.redhat.com / show_bug.cgi
debian.org / security/2012/dsa-2577
libssh.org / 2012/11/20/libssh-0-5-3-security-release
Vendor Advisory