fetchmail up to 5.9.7 socket.c cryptographic issue

CVSS Meta Temp Score
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CTI Interest Score
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6.2$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in fetchmail up to 5.9.7. This issue affects some unknown processing of the file socket.c. Executing a manipulation can lead to cryptographic issue. This vulnerability is handled as CVE-2009-2666. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in fetchmail up to 5.9.7 and classified as critical. This vulnerability affects an unknown code block of the file socket.c. The manipulation with an unknown input leads to a cryptographic issue vulnerability. The CWE definition for the vulnerability is CWE-310. As an impact it is known to affect confidentiality, and integrity. CVE summarizes:

socket.c in fetchmail before 6.3.11 does not properly handle a \0 character in a domain name in the subject s Common Name (CN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.

The weakness was released 08/05/2009 by Matthias Andree (Website). The advisory is available at vupen.com. This vulnerability was named CVE-2009-2666. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1600 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 41998 (openSUSE 10 Security Update : fetchmail (fetchmail-6410)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165653 (SUSE Enterprise Linux Security Update Subversion (SUSE-SA:2009:044)).

Upgrading to version 5.9.8 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (41998), SecurityFocus (BID 35951†), OSVDB (56855†), Secunia (SA36175†) and SecurityTracker (ID 1022679†). Entries connected to this vulnerability are available at VDB-41033, VDB-50153 and VDB-49314. 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: 6.5
VulDB Meta Temp Score: 6.2

VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Class: Cryptographic issue
CWE: CWE-310
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: 41998
Nessus Name: openSUSE 10 Security Update : fetchmail (fetchmail-6410)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 64631
OpenVAS Name: Debian Security Advisory DSA 1852-1 (fetchmail)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: fetchmail 5.9.8

Timelineinfo

08/05/2009 🔍
08/05/2009 +0 days 🔍
08/05/2009 +0 days 🔍
08/05/2009 +0 days 🔍
08/05/2009 +0 days 🔍
08/06/2009 +1 days 🔍
08/07/2009 +0 days 🔍
08/10/2009 +3 days 🔍
10/06/2009 +57 days 🔍
03/18/2015 +1989 days 🔍
05/17/2025 +3713 days 🔍

Sourcesinfo

Advisory: vupen.com⛔
Researcher: Matthias Andree
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2009-2666 (🔍)
GCVE (CVE): GCVE-0-2009-2666
GCVE (VulDB): GCVE-100-49306

OVAL: 🔍

SecurityFocus: 35951 - Fetchmail NULL Character CA SSL Certificate Validation Security Bypass Vulnerability
Secunia: 36175
OSVDB: 56855 - Fetchmail X.509 Certificate Authority (CA) Common Name Null Byte Handling SSL MiTM Weakness
SecurityTracker: 1022679
Vulnerability Center: 23150 - Eric Raymond Fetchmail Prior to 6.3.11 Remote Security Bypass Vulnerability via SSL, High

See also: 🔍

Entryinfo

Created: 03/18/2015 15:15
Updated: 05/17/2025 18:04
Changes: 03/18/2015 15:15 (66), 02/13/2017 10:05 (9), 08/13/2021 15:11 (4), 08/13/2021 15:17 (1), 12/29/2024 00:26 (17), 05/17/2025 18:04 (1)
Complete: 🔍
Cache ID: 216::103

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