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Fencer Intel
medium 5.0

CVE-2011-4576 json

The SSL 3.0 implementation in OpenSSL before 0.9.8s and 1.x before 1.0.0f does not properly initialize data structures for block cipher pad…

published 2012-01-06 14 y ago modified 2026-06-16 4 mo ago also EUVD-2011-4502

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
15.6%
EPSS 15.6% chance of exploitation in 30 days, percentile 96%
public exploits
0
none known

Summary

The SSL 3.0 implementation in OpenSSL before 0.9.8s and 1.x before 1.0.0f does not properly initialize data structures for block cipher padding, which might allow remote attackers to obtain sensitive information by decrypting the padding data sent by an SSL peer.

Patch / fix

  • openssl Debian 14, Debian 13, Debian 12 1.0.0f-1

debian advisories DEBIAN-CVE-2011-4576

  • openssl RHEL 5 0.9.8e-20.el5_7.1
  • openssl-perl RHEL 5 0.9.8e-20.el5_7.1
  • openssl RHEL 6 1.0.0-20.el6_2.1
  • openssl-perl RHEL 6 1.0.0-20.el6_2.1
  • rhev-hypervisor6 RHEL 6 6.2-20120209.0.el6_2
  • rhev-hypervisor6-tools RHEL 6 6.2-20120209.0.el6_2
  • openssl RHEL 4 0.9.7a-43.18.el4
  • openssl-perl RHEL 4 0.9.7a-43.18.el4

red hat advisories RHSA-2012:0060RHSA-2012:0059RHSA-2012:0109RHSA-2012:0086

  • libqt4 SLES 12 SP1, SLES 12, SLED 12 SP1 +7 more 4.8.6-7.1
  • libqt4-sql-plugins SLES 12 SP1, SLES 12, SLED 12 SP1 +7 more 4.8.6-7.1

suse advisories SUSE-SU-403SUSE-SU-403 Forbidden-1

  • tor openSUSE Tumbleweed 0.2.8.11-1.1
  • openssl-1_1 openSUSE Tumbleweed 1.1.1l-1.2

opensuse advisories openSUSE-SU-2024:10423-1openSUSE-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-2011-4576 updated cvss 4.3

openssl: uninitialized SSL 3.0 padding

  • Red Hat Enterprise Linux 4 openssl096b Red Hat Enterprise Linux 5 openssl097a Red Hat Enterprise Linux 6 openssl098e
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux (v. 5 server) openssl 0.9.8e-20.el5_7.1, openssl-perl 0.9.8e-20.el5_7.1
    fixed: vendor fix RHSA-2012:0060
  • Red Hat Enterprise Linux AS version 4 openssl 0.9.7a-43.18.el4, openssl-perl 0.9.7a-43.18.el4
    fixed: vendor fix RHSA-2012:0086
  • Red Hat Enterprise Linux Desktop (v. 5 client) openssl 0.9.8e-20.el5_7.1, openssl-perl 0.9.8e-20.el5_7.1
    fixed: vendor fix RHSA-2012:0060
  • Red Hat Enterprise Linux Desktop (v. 6) openssl 1.0.0-20.el6_2.1 Red Hat Enterprise Linux Desktop Optional (v. 6) openssl 1.0.0-20.el6_2.1, openssl-perl 1.0.0-20.el6_2.1
    fixed: vendor fix RHSA-2012:0059
  • Red Hat Enterprise Linux Desktop version 4 openssl 0.9.7a-43.18.el4, openssl-perl 0.9.7a-43.18.el4 Red Hat Enterprise Linux ES version 4 openssl 0.9.7a-43.18.el4, openssl-perl 0.9.7a-43.18.el4
    fixed: vendor fix RHSA-2012:0086
  • Red Hat Enterprise Linux HPC Node (v. 6) openssl 1.0.0-20.el6_2.1 Red Hat Enterprise Linux HPC Node Optional (v. 6) openssl 1.0.0-20.el6_2.1, openssl-perl 1.0.0-20.el6_2.1 Red Hat Enterprise Linux Server (v. 6) openssl 1.0.0-20.el6_2.1 Red Hat Enterprise Linux Server Optional (v. 6) openssl 1.0.0-20.el6_2.1, openssl-perl 1.0.0-20.el6_2.1 Red Hat Enterprise Linux Workstation (v. 6) openssl 1.0.0-20.el6_2.1 Red Hat Enterprise Linux Workstation Optional (v. 6) openssl 1.0.0-20.el6_2.1, openssl-perl 1.0.0-20.el6_2.1
    fixed: vendor fix RHSA-2012:0059
  • Red Hat Enterprise Linux WS version 4 openssl 0.9.7a-43.18.el4, openssl-perl 0.9.7a-43.18.el4
    fixed: vendor fix RHSA-2012:0086
show 5 more
  • Red Hat JBoss Enterprise Application Platform 5.1
    fixed: vendor fix RHSA-2012:1307
  • Red Hat JBoss Enterprise Application Platform 6.0
    fixed: vendor fix RHSA-2012:1308
  • Red Hat JBoss Web Server 1.0
    fixed: vendor fix RHSA-2012:1306
  • Red Hat RHEL Desktop Workstation (v. 5 client) openssl 0.9.8e-20.el5_7.1
    fixed: vendor fix RHSA-2012:0060
  • Red Hat RHEV Hypervisor for RHEL-6 rhev-hypervisor6 6.2-20120209.0.el6_2, rhev-hypervisor6-tools 6.2-20120209.0.el6_2
    fixed: vendor fix RHSA-2012:0109

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

15.57% 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 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness
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.