OpenSSL 1.0.1/1.0.2/1.1.0 64-bit Block Cipher SWEET32 information disclosure

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.

A vulnerability, which was classified as critical, was found in OpenSSL 1.0.1/1.0.2/1.1.0 (Network Encryption Software). This affects some unknown functionality of the component 64-bit Block Cipher. The manipulation with an unknown input leads to a information disclosure vulnerability (SWEET32). CWE is classifying the issue as CWE-200. This is going to have an impact on confidentiality, integrity, and availability.

The weakness was shared 08/24/2016 as SWEET32 as confirmed blog post (Website). It is possible to read the advisory at The vendor was not involved in the public release. This vulnerability is uniquely identified as CVE-2016-2183. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are unknown but a public exploit is available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 02/20/2017). The advisory points out:

Because DES (and triple-DES) has only a 64-bit block size, birthday attacks are a real concern. With the ability to run Javascript in a browser, it is possible to send enough traffic to cause a collision, and then use that information to recover something like a session Cookie. Their experiments have been able to recover a cookie in under two days. More details are available at their website. But the take-away is this: triple-DES should now be considered as “bad” as RC4.

It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 95255 (AIX OpenSSL Advisory : openssl_advisory21.asc (SWEET32)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family AIX Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 157837 (Oracle Enterprise Linux Security Update for python (ELSA-2018-3041)). The advisory illustrates:

Triple-DES, which shows up as “DES-CBC3” in an OpenSSL cipher string, is still used on the Web, and major browsers are not yet willing to completely disable it.

The blog post contains the following remark:

For 1.0.2 and 1.0.1, we removed the triple-DES ciphers from the “HIGH” keyword and put them into “MEDIUM.” Note that we did not remove them from the “DEFAULT” keyword. For the 1.1.0 release, which we expect to release tomorrow, we will treat triple-DES just like we are treating RC4. It is not compiled by default; you have to use “enable-weak-ssl-ciphers” as a config option. Even when those ciphers are compiled, triple-DES is only in the “MEDIUM” keyword. In addition, because this is a new release, we also removed it from the “DEFAULT” keyword.

The vulnerability is also documented in the databases at SecurityFocus (BID 92630), SecurityTracker (ID 1036696) and Tenable (95255). Further details are available at The entries 90396, 90937, 90940 and 90941 are related to this item.


  • HPE Business Service Management




CPE 2.3infoedit

CPE 2.2infoedit


VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.6
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍



VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍


Name: SWEET32
Class: Information disclosure / SWEET32
CWE: CWE-200
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 95255
Nessus Name: AIX OpenSSL Advisory : openssl_advisory21.asc (SWEET32)
Nessus File: 🔍
Nessus Family: 🔍

OpenVAS ID: 59958
OpenVAS Name: RedHat Update for openssl RHSA-2016:1940-01
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
Geopolitics: 🔍
Economy: 🔍
Predictions: 🔍
Remediation: 🔍


Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍


08/24/2016 🔍
08/25/2016 +1 days 🔍
08/26/2016 +1 days 🔍
08/31/2016 +5 days 🔍
02/20/2017 +173 days 🔍



Advisory: SWEET32
Status: Confirmed

CVE: CVE-2016-2183 (🔍)
SecurityFocus: 92630
SecurityTracker: 1036696 - OpenSSL 3DES Cipher Block Collision Weakness Lets Remote Users Decrypt Data in Certain Cases

scip Labs:
Misc.: 🔍
See also: 🔍


Created: 08/25/2016 02:36 PM
Updated: 02/20/2017 08:12 AM
Changes: (22) software_type vulnerability_cwe vulnerability_cvss2_nvd_av vulnerability_cvss2_nvd_ac vulnerability_cvss2_nvd_au vulnerability_cvss2_nvd_ci vulnerability_cvss2_nvd_ii vulnerability_cvss2_nvd_ai source_cve_nvd_published source_securityfocus source_sectracker_date source_sectracker_title source_sectracker_cause source_nessus_name source_nessus_filename source_nessus_family source_openvas_id source_openvas_filename source_openvas_title source_openvas_family source_qualys_id source_qualys_title
Complete: 🔍


No comments yet. Please log in to comment.

Do you know our Splunk app?

Download it now for free!