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CVE-2015-2318

23
FAUCET Score

CVE-2015-2318 describes a "SMACK SKIP-TLS" vulnerability in the TLS stack of Mono versions prior to 3.12.1, affecting Debian and Mono Project distributions. This flaw allows man-in-the-middle attackers to bypass handshake state validation, enabling message skipping attacks and client impersonation. Rated 8.1 HIGH (CVSSv3), it presents a high-impact, network-based attack with high complexity, potentially leading to full compromise of confidentiality, integrity, and availability. There is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 3.12.1CPE matchmatch criteria
cpe:2.3:a:mono-project:mono:*:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.1HIGH

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.97%
Probability of exploitation in next 30 days
EPSS Percentile
78.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0197 is in the 36th percentile among its peer group of 8,914 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 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

bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
github.com / mono/mono/commit/1509226c41d74194c146deb173e752b8d3cdeec4
Third Party Advisory
mitls.org / pages/attacks/SMACK
Third Party Advisory
debian.org / security/2015/dsa-3202
Third Party Advisory
mono-project.com / news/2015/03/07/mono-tls-vulnerability
Vendor Advisory
openwall.com / lists/oss-security/2015/03/17/9
Mailing ListThird Party Advisory
securityfocus.com / bid/73253
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-2547-1
Third Party Advisory