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CVE detail

CVE-2015-4000

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.

CVSS 3.7 · LowBuzz score 22.6

Buzz score

Why this CVE is surfacing

Buzz score total 22.6

This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.

Buzz score components · mention 16.1 · diversity 6.5 · KEV 0.0 · OTX 0.0 · PoC 0.0
Mention score
16.1
4 evidence mentions in the snapshot
Diversity score
6.5
2 sources across 1 categories
KEV score
0.0
No KEV entry observed
OTX score
0.0
0 OTX pulses
PoC score
0.0
0 repos · best confidence N/A
Best PoC traction
0
Maximum stars on a matched PoC repo

Why it matters now

Mention timeline

Total mentions
0
within the 30d window
Peak daily
0
highest bucket

Evidence

Source links by recency

Newest mentions first
4 source links · newest first
  • OpenSSL Preparing Updates to Patch High Severity VulnerabilitySecurityWeek

    OpenSSL versions 1.0.2d and 1.0.1p will be released later this week to address a serious security bug, the OpenSSL Project Team announced on Monday. According to the developers of the popular open-source toolkit for SSL/TLS, OpenSSL 1.0.2d and 1.0.1p will be released on Thursday, July 9, and they will fix a single high severity vulnerability.

    newswww.securityweek.comJul 6, 2015, 4:31 PM
  • New OpenSSL versions squash LogJam bugHelp Net Security

    The OpenSSL Project has pushed another update for the eponymous open-source cryptographic library. This one plugs several moderate bugs, one low one, and LogJam (CVE-2015-4000), which can be exploited to perform MitM attacks.“A vulnerability in the TLS protocol allows a man-in-the-middle attacker to downgrade vulnerable TLS connections using ephemeral Diffie-Hellman key exchange to 512-bit export-grade cryptography,” they explained in an advisory published on Thurdsay.“OpenSSL has added protection for TLS clients by rejecting handshakes with DH … More →

    newswww.helpnetsecurity.comJun 12, 2015, 1:37 AM
  • OpenSSL Patches Logjam Bug, DoS VulnerabilitiesSecurityWeek

    OpenSSL versions 1.0.2b, 1.0.1n, 1.0.0s and 0.9.8zg have been released. The latest versions of the open-source toolkit for SSL/TLS address several moderate and low severity security bugs.

    newswww.securityweek.comJun 11, 2015, 4:36 PM
  • Hundreds of Cloud Services Potentially Vulnerable to Logjam Attacks: SkyhighSecurityWeek

    The recently disclosed Transport Layer Security (TLS) vulnerability dubbed Logjam affects numerous cloud services, cloud security company Skyhigh Networks reported on Wednesday.

    newswww.securityweek.comMay 21, 2015, 8:35 AM

Exploit code

Public exploit repository references

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0 repository references · best confidence N/A · max 0 stars
No public PoC repositories have been matched yet.

Related records

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