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CVE-2012-4561

19
FAUCET Score

CVE-2012-4561 is a denial-of-service vulnerability affecting libssh versions prior to 0.5.3. Specifically, several functions in keys.c improperly free an invalid pointer on an error path, which could lead to a crash. This vulnerability has a CVSS score of 5.0, indicating a medium severity, and can be exploited remotely with low attack complexity, resulting in a denial of service. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

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

5.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.75%
Probability of exploitation in next 30 days
EPSS Percentile
90.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0475 is in the 88th percentile among its peer group of 23,703 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Remediation records are not available for this CVE.

References

lists.fedoraproject.org / pipermail/package-announce/2012-November/093313.html
lists.fedoraproject.org / pipermail/package-announce/2012-November/093474.html
lists.opensuse.org / opensuse-security-announce/2012-12/msg00002.html
lists.opensuse.org / opensuse-updates/2012-12/msg00016.html
lists.opensuse.org / opensuse-updates/2013-01/msg00021.html
bugzilla.redhat.com / show_bug.cgi
exchange.xforce.ibmcloud.com / vulnerabilities/80220
debian.org / security/2012/dsa-2577
libssh.org / 2012/11/20/libssh-0-5-3-security-release
Vendor Advisory
mandriva.com / security/advisories
openwall.com / lists/oss-security/2012/11/20/3
securityfocus.com / bid/56604
ubuntu.com / usn/USN-1640-1