Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2011-1926

Severity CVSS v4.0:
Pending analysis
Type:
CWE-264 Permissions, Privileges, and Access Control
Publication date:
23/05/2011
Last modified:
11/04/2025

Description

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.

Impact

Vector 2.0
AV:N/AC:H/Au:N/C:P/I:P/A:P CVSS v2.0 Severity and Metrics:

Base Score: 5.10 MEDIUM
Vector: AV:N/AC:H/Au:N/C:P/I:P/A:P

Attack Vector (AV): Network
Attack Complexity (AC): High
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): Physical

Base Score 2.0
5.10
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:cmu:cyrus_imap_server:*:*:*:*:*:*:*:* 2.4.6 (including)
cpe:2.3:a:cmu:cyrus_imap_server:2.0.17:*:*:*:*:*:*:*
cpe:2.3:a:cmu:cyrus_imap_server:2.1.16:*:*:*:*:*:*:*
cpe:2.3:a:cmu:cyrus_imap_server:2.1.17:*:*:*:*:*:*:*
cpe:2.3:a:cmu:cyrus_imap_server:2.1.18:*:*:*:*:*:*:*
cpe:2.3:a:cmu:cyrus_imap_server:2.2.8:*:*:*:*:*:*:*
cpe:2.3:a:cmu:cyrus_imap_server:2.2.9:*:*:*:*:*:*:*
cpe:2.3:a:cmu:cyrus_imap_server:2.2.10:*:*:*:*:*:*:*
cpe:2.3:a:cmu:cyrus_imap_server:2.2.11:*:*:*:*:*:*:*
cpe:2.3:a:cmu:cyrus_imap_server:2.2.12:*:*:*:*:*:*:*
cpe:2.3:a:cmu:cyrus_imap_server:2.2.13:*:*:*:*:*:*:*
cpe:2.3:a:cmu:cyrus_imap_server:2.2.13p1:*:*:*:*:*:*:*
cpe:2.3:a:cmu:cyrus_imap_server:2.3.0:*:*:*:*:*:*:*
cpe:2.3:a:cmu:cyrus_imap_server:2.3.1:*:*:*:*:*:*:*
cpe:2.3:a:cmu:cyrus_imap_server:2.3.2:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools