Postfix up to 2.7.2 access control

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.6$0-$5k0.00

A vulnerability was found in Postfix. It has been rated as critical. This issue affects an unknown part. The manipulation with an unknown input leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The STARTTLS implementation in Postfix 2.4.x before 2.4.16, 2.5.x before 2.5.12, 2.6.x before 2.6.9, and 2.7.x before 2.7.3 does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted SMTP sessions by sending a cleartext command that is processed after TLS is in place, related to a "plaintext command injection" attack.

The bug was discovered 01/05/2011. The weakness was presented 03/08/2011 by Wietse Venema as confirmed advisory (CERT.org). It is possible to read the advisory at kb.cert.org. The identification of this vulnerability is CVE-2011-0411 since 01/11/2011. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 61 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 68249 (Oracle Linux 6 : postfix (ELSA-2011-0423)), 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 27359 (ProFTPD "mod_sftp" module and TLS implementation Vulnerabilities).

Upgrading to version 2.7.0 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 11309.

The vulnerability is also documented in the databases at X-Force (65932) and Tenable (68249). See 4290, 56911, 56855 and 56854 for similar entries.

Productinfo

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Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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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

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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Exploitinginfo

Class: Access control
CWE: CWE-264
ATT&CK: T1068

Local: No
Remote: Yes

Availability: 🔍
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 68249
Nessus Name: Oracle Linux 6 : postfix (ELSA-2011-0423)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 69733
OpenVAS Name: Debian Security Advisory DSA 2233-1 (postfix)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Postfix 2.7.0
TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

ISS Proventia IPS: 🔍
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Timelineinfo

01/05/2011 🔍
01/11/2011 +6 days 🔍
03/07/2011 +55 days 🔍
03/07/2011 +0 days 🔍
03/07/2011 +0 days 🔍
03/08/2011 +1 days 🔍
03/08/2011 +0 days 🔍
03/08/2011 +0 days 🔍
03/09/2011 +0 days 🔍
03/15/2011 +6 days 🔍
03/16/2011 +1 days 🔍
07/12/2013 +849 days 🔍
03/20/2015 +616 days 🔍
10/19/2021 +2405 days 🔍

Sourcesinfo

Advisory: RHSA-2011:0423
Researcher: Wietse Venema
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-0411 (🔍)
OVAL: 🔍

X-Force: 65932
SecurityTracker: 1025179 - Postfix Plaintext to TLS Switching Error Lets Remote Users Inject Plaintext Commands
Vulnerability Center: 30361 - [cpuapr2011-301950] Postfix STARTTLS Remote Arbitrary Code Execution or Information Disclosure Vulnerability, High
SecurityFocus: 46767 - Multiple Vendors STARTTLS Implementation Plaintext Arbitrary Command Injection Vulnerability
Secunia: 43646 - Postfix "STARTTLS" Plaintext Injection Vulnerability, Less Critical
OSVDB: 71021 - Postfix STARTTLS Arbitrary Plaintext Command Injection
Vupen: ADV-2011-0611

See also: 🔍

Entryinfo

Created: 03/20/2015 16:16
Updated: 10/19/2021 16:59
Changes: 03/20/2015 16:16 (75), 03/19/2017 07:49 (21), 10/19/2021 16:44 (3), 10/19/2021 16:52 (1), 10/19/2021 16:59 (2)
Complete: 🔍

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