The TLS protocol 1.2 and earlier, when a DHE_EXPORT ciphersuite is enabled on a server but not on a client, does not properly convey a DHE_EXPORT choice, which allows man-in-the-middle attackers to conduct cipher-downgrade attacks by rewriting a ClientHello with DHE replaced by DHE_EXPORT and then rewriting a ServerHello with DHE_EXPORT replaced by DHE, aka the "Logjam" issue.
Published 2015-05-21 00:59:00
Updated 2024-10-22 13:42:15
Source MITRE
View at NVD,   CVE.org

Products affected by CVE-2015-4000

Threat overview for CVE-2015-4000

Top countries where our scanners detected CVE-2015-4000
Top open port discovered on systems with this issue 80
IPs affected by CVE-2015-4000 2,350
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2015-4000!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2015-4000

96.89%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 100 %
Percentile, the proportion of vulnerabilities that are scored at or less

Metasploit modules for CVE-2015-4000

  • SSL/TLS Version Detection
    Disclosure Date: 2014-10-14
    First seen: 2022-12-23
    auxiliary/scanner/ssl/ssl_version
    Check if a server supports a given version of SSL/TLS and cipher suites. The certificate is stored in loot, and any known vulnerabilities against that SSL version and cipher suite combination are checked. These checks include POODLE, deprecated protocols, expired/no

CVSS scores for CVE-2015-4000

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
4.3
MEDIUM AV:N/AC:M/Au:N/C:N/I:P/A:N
8.6
2.9
NIST
3.7
LOW CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
2.2
1.4
NIST

CWE ids for CVE-2015-4000

  • Assigned by: nvd@nist.gov (Primary)

References for CVE-2015-4000

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