CRITICAL
CVE-2015-2320
CWE-295Published: January 8, 2018· Updated: Jun 17, 2026
9.8
CVSS v3.1
Official Description
The TLS stack in Mono before 3.12.1 allows remote attackers to have unspecified impact via vectors related to client-side SSLv2 fallback.
Technical Analysis
CVE-2015-2320 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Vendors & Products
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (14)
→
http://www.openwall.com/lists/oss-security/2015/03/17/9Mailing List · Third Party Advisory
→
http://www.securityfocus.com/bid/73256Third Party Advisory · VDB Entry
→
http://www.ubuntu.com/usn/USN-2547-1Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=1202869Issue Tracking · Third Party Advisory
→
https://github.com/mono/mono/commit/b371da6b2d68b4cdd0f21d6342af6c42794f998bThird Party Advisory
→
https://www.debian.org/security/2015/dsa-3202Third Party Advisory
→
http://www.openwall.com/lists/oss-security/2015/03/17/9Mailing List · Third Party Advisory
→
http://www.securityfocus.com/bid/73256Third Party Advisory · VDB Entry
→
http://www.ubuntu.com/usn/USN-2547-1Third Party Advisory
→
https://bugzilla.redhat.com/show_bug.cgi?id=1202869Issue Tracking · Third Party Advisory
→
https://github.com/mono/mono/commit/b371da6b2d68b4cdd0f21d6342af6c42794f998bThird Party Advisory
→
https://www.debian.org/security/2015/dsa-3202Third Party Advisory
Quick Facts
CVE IDCVE-2015-2320
CVSS Score9.8 / 10
SeverityCRITICAL
WeaknessCWE-295
CISA KEVNo
Affected2 vendor(s)
PublishedJan 8, 2018
Related CVEs (CWE-295)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2015-2320 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.