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Fencer Intel
medium 5.0

CVE-2012-0884 json

The implementation of Cryptographic Message Syntax (CMS) and PKCS #7 in OpenSSL before 0.9.8u and 1.x before 1.0.0h does not properly restr…

published 2012-03-13 14 y ago modified 2026-06-16 4 mo ago also EUVD-2012-0907

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
13.2%
EPSS 13.2% chance of exploitation in 30 days, percentile 96%
public exploits
0
none known

Summary

The implementation of Cryptographic Message Syntax (CMS) and PKCS #7 in OpenSSL before 0.9.8u and 1.x before 1.0.0h does not properly restrict certain oracle behavior, which makes it easier for context-dependent attackers to decrypt data via a Million Message Attack (MMA) adaptive chosen ciphertext attack.

Patch / fix

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

debian advisories DEBIAN-CVE-2012-0884

  • openssl098 Ubuntu 14.04 LTS 0.9.8o-7ubuntu3.2.14.04.1

ubuntu advisories UBUNTU-CVE-2012-0884

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 RHEL 5 0.9.8e-22.el5_8.1
  • openssl RHEL 6 1.0.0-20.el6_2.3
  • openssl-perl RHEL 5 0.9.8e-22.el5_8.1
  • openssl-perl RHEL 6 1.0.0-20.el6_2.3

red hat advisories RHSA-2012:0426

  • 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

  • openssl-1_1 openSUSE Tumbleweed 1.1.1l-1.2

opensuse advisories openSUSE-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-2012-0884 updated cvss 2.6

openssl: CMS and PKCS#7 Bleichenbacher attack

  • Red Hat Enterprise Linux 4 openssl, openssl096b Red Hat Enterprise Linux 5 openssl097a Red Hat Enterprise Linux 6 openssl098e
    affected: no fix planned “Will not fix”
  • Red Hat JBoss Enterprise Web Server 1 openssl
    affected: no fix available
  • Red Hat Enterprise Linux (v. 5 server) openssl 0.9.8e-22.el5_8.1, openssl-perl 0.9.8e-22.el5_8.1 Red Hat Enterprise Linux Desktop (v. 5 client) openssl 0.9.8e-22.el5_8.1, openssl-perl 0.9.8e-22.el5_8.1 Red Hat Enterprise Linux Desktop (v. 6) openssl 1.0.0-20.el6_2.3 Red Hat Enterprise Linux Desktop Optional (v. 6) openssl 1.0.0-20.el6_2.3, openssl-perl 1.0.0-20.el6_2.3 Red Hat Enterprise Linux HPC Node (v. 6) openssl 1.0.0-20.el6_2.3 Red Hat Enterprise Linux HPC Node Optional (v. 6) openssl 1.0.0-20.el6_2.3, openssl-perl 1.0.0-20.el6_2.3
    +4 more products
    Red Hat Enterprise Linux Server (v. 6) openssl 1.0.0-20.el6_2.3 Red Hat Enterprise Linux Server Optional (v. 6) openssl 1.0.0-20.el6_2.3, openssl-perl 1.0.0-20.el6_2.3 Red Hat Enterprise Linux Workstation (v. 6) openssl 1.0.0-20.el6_2.3 Red Hat Enterprise Linux Workstation Optional (v. 6) openssl 1.0.0-20.el6_2.3, openssl-perl 1.0.0-20.el6_2.3
    fixed: vendor fix RHSA-2012:0426
  • 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-22.el5_8.1
    fixed: vendor fix RHSA-2012:0426

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

13.18% 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.