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Vulnerability details: VCID-kc3z-c9sh-pya4
Vulnerability ID VCID-kc3z-c9sh-pya4
Aliases CVE-2015-2318
Summary The TLS stack in Mono before 3.12.1 allows man-in-the-middle attackers to conduct message skipping attacks and consequently impersonate clients by leveraging missing handshake state validation, aka a "SMACK SKIP-TLS" issue.
Status Published
Exploitability 0.5
Weighted Severity 7.3
Risk 3.6
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-295 Improper Certificate Validation
System Score Found at
epss 0.0129 https://api.first.org/data/v1/epss?cve=CVE-2015-2318
epss 0.0129 https://api.first.org/data/v1/epss?cve=CVE-2015-2318
epss 0.0129 https://api.first.org/data/v1/epss?cve=CVE-2015-2318
epss 0.0129 https://api.first.org/data/v1/epss?cve=CVE-2015-2318
epss 0.0129 https://api.first.org/data/v1/epss?cve=CVE-2015-2318
epss 0.0129 https://api.first.org/data/v1/epss?cve=CVE-2015-2318
epss 0.0129 https://api.first.org/data/v1/epss?cve=CVE-2015-2318
epss 0.0129 https://api.first.org/data/v1/epss?cve=CVE-2015-2318
epss 0.0129 https://api.first.org/data/v1/epss?cve=CVE-2015-2318
epss 0.0129 https://api.first.org/data/v1/epss?cve=CVE-2015-2318
epss 0.0129 https://api.first.org/data/v1/epss?cve=CVE-2015-2318
epss 0.0129 https://api.first.org/data/v1/epss?cve=CVE-2015-2318
epss 0.0129 https://api.first.org/data/v1/epss?cve=CVE-2015-2318
epss 0.0129 https://api.first.org/data/v1/epss?cve=CVE-2015-2318
cvssv2 6.8 https://nvd.nist.gov/vuln/detail/CVE-2015-2318
cvssv3 8.1 https://nvd.nist.gov/vuln/detail/CVE-2015-2318
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2015-2318
https://bugzilla.redhat.com/show_bug.cgi?id=1202869
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2318
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2319
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2320
https://github.com/mono/mono/commit/1509226c41d74194c146deb173e752b8d3cdeec4
https://mitls.org/pages/attacks/SMACK#skip
https://www.debian.org/security/2015/dsa-3202
http://www.mono-project.com/news/2015/03/07/mono-tls-vulnerability/
http://www.openwall.com/lists/oss-security/2015/03/17/9
http://www.securityfocus.com/bid/73253
http://www.ubuntu.com/usn/USN-2547-1
780751 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=780751
cpe:2.3:a:mono-project:mono:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mono-project:mono:*:*:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:o:debian:debian_linux:6.0:*:*:*:*:*:*:*
CVE-2015-2318 https://nvd.nist.gov/vuln/detail/CVE-2015-2318
USN-2547-1 https://usn.ubuntu.com/2547-1/
No exploits are available.
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2015-2318
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2015-2318
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.78816
EPSS Score 0.0129
Published At Aug. 7, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:41:24.805265+00:00 Ubuntu USN Importer Import https://usn.ubuntu.com/2547-1/ 37.0.0