OpenSSL up to 1.0.0i SSLv3 Downgrade POODLE cryptographic issues

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability, which was classified as critical, was found in OpenSSL up to 1.0.0i (Network Encryption Software). This affects an unknown part of the component SSLv3 Downgrade Handler. The manipulation with an unknown input leads to a weak encryption vulnerability (POODLE). CWE is classifying the issue as CWE-310. This is going to have an impact on confidentiality, and integrity. The summary by CVE is:

The SSL protocol 3.0, as used in OpenSSL through 1.0.1i and other products, uses nondeterministic CBC padding, which makes it easier for man-in-the-middle attackers to obtain cleartext data via a padding-oracle attack, aka the "POODLE" issue.

The issue has been introduced in 03/29/2010. The weakness was released 10/14/2014 by Adam Langley, Bodo Möller, Thai Duong and Krzysztof Kotowicz with Google Security Team as This POODLE Bites: Exploiting The SSL 3.0 Fallback as confirmed security advisory (Website). It is possible to read the advisory at This vulnerability is uniquely identified as CVE-2014-3566 since 05/14/2014. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/02/2019). The attack technique deployed by this issue is T1600 according to MITRE ATT&CK. Due to its background and reception, this vulnerability has a historic impact. The advisory points out:

Encryption in SSL 3.0 uses either the RC4 stream cipher, or a block cipher in CBC mode. (...) The most severe problem of CBC encryption in SSL 3.0 is that its block cipher padding is not deterministic, and not covered by the MAC (Message Authentication Code): thus, the integrity of padding cannot be fully verified when decrypting. Padding by 1 to L bytes (where L is the block size in bytes) is used to obtain an integral number of blocks before performing blockwise CBC (cipher­block chaining) encryption

It is declared as highly functional. The vulnerability was handled as a non-public zero-day exploit for at least 1660 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 80921 (Amazon Linux AMI : java-1.7.0-openjdk (ALAS-2015-471) (POODLE)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks and running in the context local. The commercial vulnerability scanner Qualys is able to test this issue with plugin 86129 (IBM WebSphere Application Server Multiple Vulnerabilities (swg21697368)-Deprecated). The advisory illustrates:

The weakness is the easiest to exploit if there’s an entire block of padding, which (before encryption) consists of L­1 arbitrary bytes followed by a single byte of value L­1

Upgrading to version 0.9.8zc, 1.0.0o or 1.0.1j eliminates this vulnerability. It is possible to mitigate the problem by applying the configuration setting SSLProtocol All -SSLv2 -SSLv3. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published 1 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (97013), SecurityTracker (ID 1031029) and Tenable (80921). Further details are available at Entries connected to this vulnerability are available at 68000, 68040, 68743 and 68695.


  • Webserver (Apache, nginx, ...)
  • Webbrowser (Google Chrome, Microsoft Internet Explorer, Mozilla Firefox, ...)
  • Mail Server (Sendmail, Postfix, ...)
  • PBX (Asterisk)




CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.3

VulDB Base Score: 6.8
VulDB Temp Score: 5.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.8
NVD Vector: 🔍



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Class: Weak encryption / POODLE
CWE: CWE-310
ATT&CK: T1600

Local: No
Remote: Yes

Availability: 🔍
Status: Highly functional

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 80921
Nessus Name: Amazon Linux AMI : java-1.7.0-openjdk (ALAS-2015-471) (POODLE)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 65594
OpenVAS Name: CentOS Update for java CESA-2015:0085 centos6
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: ssl_version.rb
MetaSploit Name: HTTP SSL/TLS Version Detection (POODLE scanner)
MetaSploit File: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: OpenSSL 0.9.8zc/1.0.0o/1.0.1j
Config: SSLProtocol All -SSLv2 -SSLv3
Suricata ID: 2019415
Suricata Class: 🔍
Suricata Message: 🔍


03/29/2010 🔍
05/14/2014 +1507 days 🔍
10/14/2014 +153 days 🔍
10/14/2014 +0 days 🔍
10/14/2014 +0 days 🔍
10/15/2014 +1 days 🔍
10/15/2014 +0 days 🔍
10/15/2014 +0 days 🔍
10/21/2014 +6 days 🔍
01/23/2015 +94 days 🔍
05/02/2019 +1560 days 🔍



Advisory: This POODLE Bites: Exploiting The SSL 3.0 Fallback
Researcher: Adam Langley/Bodo Möller/Thai Duong/Krzysztof Kotowicz
Organization: Google Security Team
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-3566 (🔍)

X-Force: 97013 - Multiple products SSLv3 protocol information disclosure, Medium Risk
SecurityTracker: 1031029
SecurityFocus: 70574 - OpenSSL CVE-2014-3566 Man In The Middle Information Disclosure Vulnerability
Secunia: 61825 - Apple iOS Multiple Vulnerabilities, Not Critical
OSVDB: 113251

Misc.: 🔍
See also: 🔍


Created: 10/15/2014 10:21 AM
Updated: 05/02/2019 05:35 PM
Changes: (10) vulnerability_cvss3_vuldb_av vulnerability_cvss3_vuldb_ac vulnerability_cvss3_vuldb_pr vulnerability_cvss3_vuldb_ui vulnerability_cvss3_vuldb_s vulnerability_cvss3_vuldb_c vulnerability_cvss3_vuldb_i vulnerability_cvss3_vuldb_a advisory_company_name source_secunia_date
Complete: 🔍


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