CMU Cyrus IMAP Server up to 2.4.4 access control

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability labeled as critical has been found in CMU Cyrus IMAP Server up to 2.4.4. Affected by this vulnerability is an unknown functionality of the component IMAP Server. Executing a manipulation can lead to access control. This vulnerability appears as CVE-2011-1926. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in CMU Cyrus IMAP Server up to 2.4.4. It has been declared as critical. This vulnerability affects an unknown part of the component IMAP Server. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

The STARTTLS implementation in Cyrus IMAP Server before 2.4.7 does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted sessions by sending a cleartext command that is processed after TLS is in place, related to a "plaintext command injection" attack, a similar issue to CVE-2011-0411.

The weakness was presented 05/23/2011 as confirmed advisory (CERT.org). The advisory is shared for download at kb.cert.org. This vulnerability was named CVE-2011-1926. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability scanner Nessus provides a plugin with the ID 75809 (openSUSE Security Update : cyrus-imapd (openSUSE-SU-2011:0800-1)), 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 119415 (CentOS Security Update for cyrus (CESA-2011:0859)).

Upgrading to version 2.4.5 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (67867), Tenable (75809), SecurityTracker (ID 1025625†) and Vulnerability Center (SBV-31725†). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
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: Access control
CWE: CWE-264
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: 75809
Nessus Name: openSUSE Security Update : cyrus-imapd (openSUSE-SU-2011:0800-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 69740
OpenVAS Name: Debian Security Advisory DSA 2242-1 (cyrus-imapd-2.2)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Cyrus IMAP Server 2.4.5

Timelineinfo

05/09/2011 🔍
05/23/2011 +14 days 🔍
05/23/2011 +0 days 🔍
05/23/2011 +0 days 🔍
06/12/2011 +20 days 🔍
06/13/2014 +1097 days 🔍
03/23/2015 +283 days 🔍
01/26/2025 +3597 days 🔍

Sourcesinfo

Advisory: dsa-2242
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2011-1926 (🔍)
GCVE (CVE): GCVE-0-2011-1926
GCVE (VulDB): GCVE-100-57508

OVAL: 🔍

CERT: 🔍
X-Force: 67867
Secunia: 44670
SecurityTracker: 1025625
Vulnerability Center: 31725 - Cyrus IMAP Server before 2.4.7 STARTTLS I/O Buffering Allows Plaintext Command Injection, Medium

Entryinfo

Created: 03/23/2015 16:50
Updated: 01/26/2025 19:15
Changes: 03/23/2015 16:50 (59), 03/23/2017 17:01 (7), 11/07/2021 17:50 (6), 11/07/2021 17:58 (1), 11/07/2021 18:06 (1), 01/12/2025 23:56 (16), 01/26/2025 19:15 (2)
Complete: 🔍
Cache ID: 216:456:103

Once again VulDB remains the best source for vulnerability data.

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