Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2016-0736

Severity CVSS v4.0:
Pending analysis
Type:
CWE-310 Cryptographic Issues
Publication date:
27/07/2017
Last modified:
20/04/2025

Description

In Apache HTTP Server versions 2.4.0 to 2.4.23, mod_session_crypto was encrypting its data/cookie using the configured ciphers with possibly either CBC or ECB modes of operation (AES256-CBC by default), hence no selectable or builtin authenticated encryption. This made it vulnerable to padding oracle attacks, particularly with CBC.

Impact

Vector 3.x
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS v3.1 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): None

Base Score 3.x
7.50
Severity 3.x
HIGH
Vector 2.0
AV:N/AC:L/Au:N/C:P/I:N/A:N CVSS v2.0 Severity and Metrics:

Base Score: 5.00 MEDIUM
Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): None
Availability (A): None

Base Score 2.0
5.00
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:apache:http_server:2.4.0:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.4.1:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.4.2:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.4.3:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.4.6:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.4.7:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.4.8:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.4.9:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.4.10:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.4.12:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.4.14:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.4.16:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.4.19:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.4.20:*:*:*:*:*:*:*
cpe:2.3:a:apache:http_server:2.4.21:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools