stunnel 4.40/4.41 memory corruption

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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10.0$0-$5k0.00

Summaryinfo

A vulnerability was found in stunnel 4.40/4.41 and classified as critical. This issue affects some unknown processing. Such manipulation leads to memory corruption. This vulnerability is referenced as CVE-2011-2940. No exploit is available.

Detailsinfo

A vulnerability was found in stunnel 4.40/4.41 and classified as very critical. Affected by this issue is an unknown code. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

stunnel 4.40 and 4.41 might allow remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via unspecified vectors.

The weakness was published 08/25/2011 as Bug 732068 as confirmed bug report (Bugzilla). The advisory is available at bugzilla.redhat.com. This vulnerability is handled as CVE-2011-2940. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 01/11/2025).

The vulnerability scanner Nessus provides a plugin with the ID 55991 (FreeBSD : stunnel -- heap corruption vulnerability (cdeb34e6-d00d-11e0-987e-00215c6a37bb)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 119536 (Stunnel Heap Buffer Overflow Vulnerability).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (69318), Tenable (55991), SecurityFocus (BID 49254†), OSVDB (74600†) and Secunia (SA45705†). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 10.0

VulDB Base Score: 10.0
VulDB Temp Score: 10.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 55991
Nessus Name: FreeBSD : stunnel -- heap corruption vulnerability (cdeb34e6-d00d-11e0-987e-00215c6a37bb)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 70254
OpenVAS Name: FreeBSD Ports: stunnel
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

07/27/2011 🔍
08/18/2011 +22 days 🔍
08/19/2011 +1 days 🔍
08/19/2011 +0 days 🔍
08/25/2011 +6 days 🔍
08/25/2011 +0 days 🔍
08/25/2011 +0 days 🔍
08/29/2011 +4 days 🔍
08/29/2011 +0 days 🔍
03/23/2015 +1302 days 🔍
01/11/2025 +3582 days 🔍

Sourcesinfo

Advisory: Bug 732068
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-2940 (🔍)
GCVE (CVE): GCVE-0-2011-2940
GCVE (VulDB): GCVE-100-58370
X-Force: 69318
SecurityFocus: 49254 - Stunnel Unspecified Memory Corruption Vulnerability
Secunia: 45705 - Stunnel Unspecified Heap Corruption Vulnerability, Highly Critical
OSVDB: 74600
SecurityTracker: 1025959 - Stunnel Heap Overflow Lets Remote Users Execute Arbitrary Code
Vulnerability Center: 32859 - Stunnel prior to 4.42 Unspecified Remote Code Execution Vulnerability, High

Entryinfo

Created: 03/23/2015 16:50
Updated: 01/11/2025 17:40
Changes: 03/23/2015 16:50 (62), 03/30/2017 09:49 (15), 11/18/2021 09:30 (2), 11/18/2021 09:32 (1), 01/11/2025 17:40 (16)
Complete: 🔍
Cache ID: 216:788:103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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