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

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CVE-2013-1762

Severity CVSS v4.0:
Pending analysis
Type:
CWE-94 Code Injection
Publication date:
08/03/2013
Last modified:
11/04/2025

Description

stunnel 4.21 through 4.54, when CONNECT protocol negotiation and NTLM authentication are enabled, does not correctly perform integer conversion, which allows remote proxy servers to execute arbitrary code via a crafted request that triggers a buffer overflow.

Impact

Vector 2.0
AV:N/AC:H/Au:N/C:P/I:P/A:C CVSS v2.0 Severity and Metrics:

Base Score: 6.60 MEDIUM
Vector: AV:N/AC:H/Au:N/C:P/I:P/A:C

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

Base Score 2.0
6.60
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:stunnel:stunnel:*:*:*:*:*:*:*:* 4.54 (including)
cpe:2.3:a:stunnel:stunnel:4.21:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.22:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.23:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.24:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.25:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.26:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.27:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.28:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.29:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.30:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.31:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.32:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.33:*:*:*:*:*:*:*
cpe:2.3:a:stunnel:stunnel:4.34:*:*:*:*:*:*:*

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


References to Advisories, Solutions, and Tools