CVE-2016-2183

Impact:
Moderate
Public Date:
2016-08-24
IAVA:
2017-A-0021, 2017-A-0036, 2017-A-0047
CWE:
CWE-327
Bugzilla:
1369383: CVE-2016-2183 SSL/TLS: Birthday attack against 64-bit block ciphers (SWEET32)
A flaw was found in the way the DES/3DES cipher was used as part of the TLS/SSL protocol. A man-in-the-middle attacker could use this flaw to recover some plaintext data by capturing large amounts of encrypted traffic between TLS/SSL server and client if the communication used a DES/3DES based ciphersuite.

Find out more about CVE-2016-2183 from the MITRE CVE dictionary dictionary and NIST NVD.

Statement

OpenSSL security update RHSA-2016:1940 mitigates this issue by lowering priority of DES cipher suites so they are not preferred over cipher suites using AES. For compatibility reasons, DES cipher suites remain enabled by default and included in the set of cipher suites identified by the HIGH cipher string. Future updates may move them to MEDIUM or not enable them by default.

NSS addressed this issue by implementing limits on the amount of plain text which can be encrypted by using the same key. Once the limit is reached, the keys will need to be re-negotiated manually. This change will be available in nss-3.27.

GnuTLS is not affected by this issue, since it prioritizes AES before 3DES in the cipher list.

CVSS v2 metrics

Base Score 4.3
Base Metrics AV:N/AC:M/Au:N/C:P/I:N/A:N
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact None
Availability Impact None

CVSS v3 metrics

CVSS3 Base Score 3.7
CVSS3 Base Metrics CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity Impact None
Availability Impact None

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat JBoss Enterprise Application Platform 6.4 RHSA-2017:3239 2017-11-16
Red Hat Satellite 5.6 (RHEL v.6) (java-1.7.1-ibm) RHSA-2017:1216 2017-05-09
Red Hat JBoss Core Services on RHEL 7 Server (jbcs-httpd24-httpd) RHSA-2017:2709 2017-09-13
Red Hat JBoss Enterprise Web Server 2 for RHEL 7 Server RHSA-2017:3113 2017-11-02
Red Hat Enterprise Linux Supplementary (v. 6) (java-1.8.0-ibm) RHSA-2017:0462 2017-03-08
Red Hat Enterprise Linux Supplementary (v. 7) (java-1.7.1-ibm) RHSA-2017:0336 2017-02-28
Red Hat JBoss Enterprise Web Server 2 for RHEL 6 Server RHSA-2017:3113 2017-11-02
Red Hat Enterprise Linux 7 (python) RHSA-2018:2123 2018-07-03
Red Hat Enterprise Linux Supplementary (v. 6) (java-1.7.1-ibm) RHSA-2017:0336 2017-02-28
Red Hat JBoss Enterprise Application Platform 6.3 for RHEL 7 Server RHSA-2017:3240 2017-11-16
Red Hat JBoss Enterprise Application Platform 6 for RHEL 6 Server RHSA-2017:3240 2017-11-16
Red Hat JBoss Core Services 1 RHSA-2017:2708 2017-09-13
Red Hat Enterprise Linux Supplementary 5 (java-1.7.0-ibm) RHSA-2017:0337 2017-02-28
Red Hat Satellite 5.7 (RHEL v.6) (java-1.7.1-ibm) RHSA-2017:1216 2017-05-09
Red Hat JBoss Core Services on RHEL 6 Server (jbcs-httpd24-httpd) RHSA-2017:2710 2017-09-13
Red Hat Enterprise Linux Supplementary 5 (java-1.6.0-ibm) RHSA-2017:0338 2017-02-28
Red Hat Enterprise Linux Supplementary (v. 6) (java-1.6.0-ibm) RHSA-2017:0338 2017-02-28
Red Hat Enterprise Linux Supplementary (v. 7) (java-1.8.0-ibm) RHSA-2017:0462 2017-03-08
Red Hat JBoss Web Server 2.1 RHSA-2017:3114 2017-11-02

Affected Packages State

Platform Package State
Red Hat OpenStack Platform 9.0 opendaylight Will not fix
Red Hat OpenStack Platform 8.0 (Liberty) opendaylight Will not fix
Red Hat OpenStack Platform 11.0 (Ocata) opendaylight Will not fix
Red Hat OpenStack Platform 10 opendaylight Will not fix
Red Hat JBoss Web Server 3.0 openssl Will not fix
Red Hat JBoss EWS 1 openssl Will not fix
Red Hat Enterprise Linux 7 openssl098e Will not fix
Red Hat Enterprise Linux 7 nss Will not fix
Red Hat Enterprise Linux 7 openssl Will not fix
Red Hat Enterprise Linux 7 gnutls Not affected
Red Hat Enterprise Linux 6 openssl Will not fix
Red Hat Enterprise Linux 6 gnutls Not affected
Red Hat Enterprise Linux 6 nss Will not fix
Red Hat Enterprise Linux 6 openssl098e Will not fix
Red Hat Enterprise Linux 5 openssl Will not fix
Red Hat Enterprise Linux 5 openssl097a Will not fix
Red Hat Enterprise Linux 5 gnutls Not affected
Red Hat Enterprise Linux 5 nss Will not fix

Acknowledgements

Red Hat would like to thank OpenVPN for reporting this issue. Upstream acknowledges Karthikeyan Bhargavan (Inria) and Gaëtan Leurent (Inria) as the original reporters.

Mitigation

1.SSL/TLS configurations should prefer AES over DES. Versions of OpenSSL shipped with Red Hat Enterprise Linux 6 and 7 already do so. In the version of OpenSSL shipped with Red Hat Enterprise Linux 5, 3DES is listed below the AES-256 cipher and above the AES-128 cipher, therefore AES-256 based ciphersuite should not be disabled on the server.
2. Servers using OpenSSL, should not disable AES-128 and AES-256 ciphersuites. Versions of Apache shipped with Red Hat Enterprise Linux use the default cipher string, in which AES is preferred over DES/3DES based ciphersuites.

For JBoss Middleware, and Java mitigations, please review this knowledge base article:

   https://access.redhat.com/articles/2598471

External References

Last Modified
Close

Welcome! Check out the Getting Started with Red Hat page for quick tours and guides for common tasks.