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Fencer Intel
medium 4.3

CVE-2014-3511 json

The ssl23_get_client_hello function in s23_srvr.c in OpenSSL 1.0.1 before 1.0.1i allows man-in-the-middle attackers to force the use of TLS…

published 2014-08-13 12 y ago modified 2026-06-17 4 mo ago also EUVD-2014-3512

cvss
4.3
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
14.1%
EPSS 14.1% chance of exploitation in 30 days, percentile 96%
public exploits
0
none known

Summary

The ssl23_get_client_hello function in s23_srvr.c in OpenSSL 1.0.1 before 1.0.1i allows man-in-the-middle attackers to force the use of TLS 1.0 by triggering ClientHello message fragmentation in communication between a client and server that both support later TLS versions, related to a "protocol downgrade" issue.

Patch / fix

  • openssl Debian 14, Debian 13, Debian 12 1.0.1i-1

debian advisories DEBIAN-CVE-2014-3511

  • openssl Ubuntu 14.04 LTS 1.0.1f-1ubuntu2.5

ubuntu advisories UBUNTU-CVE-2014-3511

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • openssl storage 2.1, RHEL 6 1.0.1e-16.el6_5.15
  • openssl-perl storage 2.1, RHEL 6 1.0.1e-16.el6_5.15
  • openssl RHEL 7 1:1.0.1e-34.el7_0.4
  • openssl-libs RHEL 7 1:1.0.1e-34.el7_0.4
  • openssl-perl RHEL 7 1:1.0.1e-34.el7_0.4
  • rhev-hypervisor6 RHEL 6 6.6-20150123.1.el6ev
  • rhevm-spice-client rhev manager 3 3.5-2.el6
  • rhevm-spice-client-x64-cab rhev manager 3 3.5-2.el6

red hat advisories RHSA-2014:1054RHSA-2014:1052RHSA-2015:0126RHSA-2015:0197

  • libressl openSUSE Tumbleweed 2.5.0-1.1
  • openssl-1_1 openSUSE Tumbleweed 1.1.1l-1.2

opensuse advisories openSUSE-SU-2024:10309-1openSUSE-SU-2024:11127-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2014-3511 updated cvss 4.3

openssl: TLS protocol downgrade attack

  • Red Hat Enterprise Linux Client (v. 7) openssl 1.0.1e-34.el7_0.4, openssl-libs 1.0.1e-34.el7_0.4 Red Hat Enterprise Linux Client Optional (v. 7) openssl-perl 1.0.1e-34.el7_0.4 Red Hat Enterprise Linux ComputeNode (v. 7) openssl 1.0.1e-34.el7_0.4, openssl-libs 1.0.1e-34.el7_0.4 Red Hat Enterprise Linux ComputeNode Optional (v. 7) openssl-perl 1.0.1e-34.el7_0.4 Red Hat Enterprise Linux Desktop (v. 6) openssl 1.0.1e-16.el6_5.15 Red Hat Enterprise Linux Desktop Optional (v. 6) openssl 1.0.1e-16.el6_5.15, openssl-perl 1.0.1e-16.el6_5.15
    +10 more products
    Red Hat Enterprise Linux HPC Node (v. 6) openssl 1.0.1e-16.el6_5.15 Red Hat Enterprise Linux HPC Node Optional (v. 6) openssl 1.0.1e-16.el6_5.15, openssl-perl 1.0.1e-16.el6_5.15 Red Hat Enterprise Linux Server (v. 6) openssl 1.0.1e-16.el6_5.15 Red Hat Enterprise Linux Server (v. 7) openssl 1.0.1e-34.el7_0.4, openssl-libs 1.0.1e-34.el7_0.4 Red Hat Enterprise Linux Server Optional (v. 6) openssl 1.0.1e-16.el6_5.15, openssl-perl 1.0.1e-16.el6_5.15 Red Hat Enterprise Linux Server Optional (v. 7) openssl-perl 1.0.1e-34.el7_0.4 Red Hat Enterprise Linux Workstation (v. 6) openssl 1.0.1e-16.el6_5.15 Red Hat Enterprise Linux Workstation (v. 7) openssl 1.0.1e-34.el7_0.4, openssl-libs 1.0.1e-34.el7_0.4 Red Hat Enterprise Linux Workstation Optional (v. 6) openssl 1.0.1e-16.el6_5.15, openssl-perl 1.0.1e-16.el6_5.15 Red Hat Enterprise Linux Workstation Optional (v. 7) openssl-perl 1.0.1e-34.el7_0.4
    fixed: vendor fix RHSA-2014:1052
  • Red Hat Storage Server 2.1 openssl 1.0.1e-16.el6_5.15, openssl-perl 1.0.1e-16.el6_5.15
    fixed: vendor fix RHSA-2014:1054
  • Red Hat RHEV Hypervisor for RHEL-6 rhev-hypervisor6 6.6-20150123.1.el6ev
    fixed: vendor fix RHSA-2015:0126
  • Red Hat RHEV-M 3.5 rhevm-spice-client 3.5-2.el6, rhevm-spice-client-x64-cab 3.5-2.el6, rhevm-spice-client-x64-msi 3.5-2.el6, rhevm-spice-client-x86-cab 3.5-2.el6, rhevm-spice-client-x86-msi 3.5-2.el6
    fixed: vendor fix RHSA-2015:0197
  • Red Hat Enterprise Linux 5 openssl, openssl097a Red Hat Enterprise Linux 6 openssl098e Red Hat Enterprise Linux 7 openssl098e Red Hat JBoss Enterprise Application Platform 5 openssl Red Hat JBoss Enterprise Application Platform 6 openssl Red Hat JBoss Enterprise Web Server 1 openssl
    +1 more products
    Red Hat JBoss Enterprise Web Server 2 openssl
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

14.13% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:P/A:N

Classification

Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.