Sendmail up to 8.14.3 Access Restriction cryptographic issue

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability was found in Sendmail up to 8.14.3. It has been classified as critical. This affects an unknown part of the component Access Restriction. This manipulation causes cryptographic issue. This vulnerability is tracked as CVE-2009-4565. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical was found in Sendmail up to 8.14.3 (Mail Server Software). Affected by this vulnerability is an unknown code block of the component Access Restriction. 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, integrity, and availability. The summary by CVE is:

sendmail before 8.14.4 does not properly handle a \0 character in a Common Name (CN) field of an X.509 certificate, which (1) allows man-in-the-middle attackers to spoof arbitrary SSL-based SMTP servers via a crafted server certificate issued by a legitimate Certification Authority, and (2) allows remote attackers to bypass intended access restrictions via a crafted client certificate issued by a legitimate Certification Authority, a related issue to CVE-2009-2408.

The weakness was disclosed 01/04/2010 (Website). It is possible to read the advisory at vupen.com. This vulnerability is known as CVE-2009-4565 since 01/04/2010. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1600 according to MITRE ATT&CK.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 68203 (Oracle Linux 4 : sendmail (ELSA-2011-0262)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Oracle Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 165233 (SUSE Security Update for Multiple Packages (SUSE-SR:2010:006)).

Upgrading to version 8.14.4 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 (68203), SecurityFocus (BID 37543†), Secunia (SA37998†) and Vulnerability Center (SBV-24502†). The entries VDB-51851, VDB-51775, VDB-51480 and VDB-50940 are pretty similar. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
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: Cryptographic issue
CWE: CWE-310
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 68203
Nessus Name: Oracle Linux 4 : sendmail (ELSA-2011-0262)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 862155
OpenVAS Name: Fedora Update for sendmail FEDORA-2010-5399
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Sendmail 8.14.4

Timelineinfo

12/30/2009 🔍
12/30/2009 +0 days 🔍
12/30/2009 +0 days 🔍
01/03/2010 +4 days 🔍
01/04/2010 +1 days 🔍
01/04/2010 +0 days 🔍
01/04/2010 +0 days 🔍
07/12/2013 +1285 days 🔍
03/18/2015 +614 days 🔍
08/30/2021 +2357 days 🔍

Sourcesinfo

Advisory: vupen.com⛔
Status: Not defined
Confirmation: 🔍

CVE: CVE-2009-4565 (🔍)
GCVE (CVE): GCVE-0-2009-4565
GCVE (VulDB): GCVE-100-51427

OVAL: 🔍
IAVM: 🔍

SecurityFocus: 37543 - Sendmail NULL Character CA SSL Certificate Validation Security Bypass Vulnerability
Secunia: 37998
Vulnerability Center: 24502 - Sendmail Prior to 8.14.4 Remote Man-In-The-Middle Vulnerability via CA Signed Certificates, High
Vupen: ADV-2009-3661

See also: 🔍

Entryinfo

Created: 03/18/2015 15:15
Updated: 08/30/2021 14:09
Changes: 03/18/2015 15:15 (73), 07/07/2017 17:06 (6), 08/30/2021 14:09 (2)
Complete: 🔍
Cache ID: 216:426:103

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