CVE-2016-0703
openssl: Divide-and-conquer session key recovery in SSLv2
Severity Score
5.9
*CVSS v3
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
The get_client_master_key function in s2_srvr.c in the SSLv2 implementation in OpenSSL before 0.9.8zf, 1.0.0 before 1.0.0r, 1.0.1 before 1.0.1m, and 1.0.2 before 1.0.2a accepts a nonzero CLIENT-MASTER-KEY CLEAR-KEY-LENGTH value for an arbitrary cipher, which allows man-in-the-middle attackers to determine the MASTER-KEY value and decrypt TLS ciphertext data by leveraging a Bleichenbacher RSA padding oracle, a related issue to CVE-2016-0800.
La función get_client_master_key en s2_srvr.c en la implementación de SSLv2 en OpenSSL en versiones anteriores a 0.9.8zf, 1.0.0 en versiones anteriores a 1.0.0r, 1.0.1 en versiones anteriores a 1.0.1m y 1.0.2 en versiones anteriores a 1.0.2a acepta un valor CLIENT-MASTER-KEY CLEAR-KEY-LENGTH distinto de cero para un cifrado arbitrario, lo que permite a atacantes man-in-the-middle determinar el valor MASTER-KEY y descifrar datos de texto cifrados con TLS aprovechándose de un Bleichenbacher RSA padding oracle, un caso relacionado con CVE-2016-0800.
It was discovered that the SSLv2 servers using OpenSSL accepted SSLv2 connection handshakes that indicated non-zero clear key length for non-export cipher suites. An attacker could use this flaw to decrypt recorded SSLv2 sessions with the server by using it as a decryption oracle.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Authentication
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2015-12-16 CVE Reserved
- 2016-03-01 CVE Published
- 2024-08-05 CVE Updated
- 2024-11-07 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
CAPEC
References (33)
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| URL | Date | SRC |
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | <= 0.9.8ze Search vendor "Openssl" for product "Openssl" and version " <= 0.9.8ze" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.0 Search vendor "Openssl" for product "Openssl" and version "1.0.0" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.0 Search vendor "Openssl" for product "Openssl" and version "1.0.0" | beta1 |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.0 Search vendor "Openssl" for product "Openssl" and version "1.0.0" | beta2 |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.0 Search vendor "Openssl" for product "Openssl" and version "1.0.0" | beta3 |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.0 Search vendor "Openssl" for product "Openssl" and version "1.0.0" | beta4 |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.0 Search vendor "Openssl" for product "Openssl" and version "1.0.0" | beta5 |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.0a Search vendor "Openssl" for product "Openssl" and version "1.0.0a" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.0b Search vendor "Openssl" for product "Openssl" and version "1.0.0b" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.0c Search vendor "Openssl" for product "Openssl" and version "1.0.0c" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.0d Search vendor "Openssl" for product "Openssl" and version "1.0.0d" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.0e Search vendor "Openssl" for product "Openssl" and version "1.0.0e" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.0f Search vendor "Openssl" for product "Openssl" and version "1.0.0f" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.0g Search vendor "Openssl" for product "Openssl" and version "1.0.0g" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.0h Search vendor "Openssl" for product "Openssl" and version "1.0.0h" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.0i Search vendor "Openssl" for product "Openssl" and version "1.0.0i" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.0j Search vendor "Openssl" for product "Openssl" and version "1.0.0j" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.0k Search vendor "Openssl" for product "Openssl" and version "1.0.0k" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.0l Search vendor "Openssl" for product "Openssl" and version "1.0.0l" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.0m Search vendor "Openssl" for product "Openssl" and version "1.0.0m" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.0n Search vendor "Openssl" for product "Openssl" and version "1.0.0n" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.0o Search vendor "Openssl" for product "Openssl" and version "1.0.0o" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.0p Search vendor "Openssl" for product "Openssl" and version "1.0.0p" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.0q Search vendor "Openssl" for product "Openssl" and version "1.0.0q" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.1 Search vendor "Openssl" for product "Openssl" and version "1.0.1" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.1 Search vendor "Openssl" for product "Openssl" and version "1.0.1" | beta1 |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.1 Search vendor "Openssl" for product "Openssl" and version "1.0.1" | beta2 |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.1 Search vendor "Openssl" for product "Openssl" and version "1.0.1" | beta3 |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.1a Search vendor "Openssl" for product "Openssl" and version "1.0.1a" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.1b Search vendor "Openssl" for product "Openssl" and version "1.0.1b" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.1c Search vendor "Openssl" for product "Openssl" and version "1.0.1c" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.1d Search vendor "Openssl" for product "Openssl" and version "1.0.1d" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.1e Search vendor "Openssl" for product "Openssl" and version "1.0.1e" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.1f Search vendor "Openssl" for product "Openssl" and version "1.0.1f" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.1g Search vendor "Openssl" for product "Openssl" and version "1.0.1g" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.1h Search vendor "Openssl" for product "Openssl" and version "1.0.1h" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.1i Search vendor "Openssl" for product "Openssl" and version "1.0.1i" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.1j Search vendor "Openssl" for product "Openssl" and version "1.0.1j" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.1k Search vendor "Openssl" for product "Openssl" and version "1.0.1k" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.1l Search vendor "Openssl" for product "Openssl" and version "1.0.1l" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.2 Search vendor "Openssl" for product "Openssl" and version "1.0.2" | - |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.2 Search vendor "Openssl" for product "Openssl" and version "1.0.2" | beta1 |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.2 Search vendor "Openssl" for product "Openssl" and version "1.0.2" | beta2 |
Affected
| ||||||
| Openssl Search vendor "Openssl" | Openssl Search vendor "Openssl" for product "Openssl" | 1.0.2 Search vendor "Openssl" for product "Openssl" and version "1.0.2" | beta3 |
Affected
| ||||||