5.1
MEDIUM
CVE-2011-1926
Cyrus IMAP Server STARTTLS Plaintext Command Injection Vulnerability
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.

INFO

Published Date :

May 23, 2011, 10:55 p.m.

Last Modified :

April 11, 2025, 12:51 a.m.

Remotely Exploitable :

Yes !

Impact Score :

6.4

Exploitability Score :

4.9
Affected Products

The following products are affected by CVE-2011-1926 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Cmu cyrus_imap_server
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2011-1926.

URL Resource
http://bugzilla.cyrusimap.org/show_bug.cgi?id=3423 Patch
http://bugzilla.cyrusimap.org/show_bug.cgi?id=3424 Patch
http://git.cyrusimap.org/cyrus-imapd/patch/?id=523a91a5e86c8b9a27a138f04a3e3f2d8786f162 Patch
http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061374.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061415.html
http://openwall.com/lists/oss-security/2011/05/17/15 Patch
http://openwall.com/lists/oss-security/2011/05/17/2 Patch
http://secunia.com/advisories/44670
http://secunia.com/advisories/44876
http://secunia.com/advisories/44913
http://secunia.com/advisories/44928
http://www.cyrusimap.org/docs/cyrus-imapd/2.4.7/changes.php
http://www.debian.org/security/2011/dsa-2242
http://www.debian.org/security/2011/dsa-2258
http://www.kb.cert.org/vuls/id/555316 US Government Resource
http://www.mandriva.com/security/advisories?name=MDVSA-2011:100
http://www.redhat.com/support/errata/RHSA-2011-0859.html
http://www.securitytracker.com/id?1025625
https://bugzilla.redhat.com/show_bug.cgi?id=705288 Patch
https://exchange.xforce.ibmcloud.com/vulnerabilities/67867
http://bugzilla.cyrusimap.org/show_bug.cgi?id=3423 Patch
http://bugzilla.cyrusimap.org/show_bug.cgi?id=3424 Patch
http://git.cyrusimap.org/cyrus-imapd/patch/?id=523a91a5e86c8b9a27a138f04a3e3f2d8786f162 Patch
http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061374.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061415.html
http://openwall.com/lists/oss-security/2011/05/17/15 Patch
http://openwall.com/lists/oss-security/2011/05/17/2 Patch
http://secunia.com/advisories/44670
http://secunia.com/advisories/44876
http://secunia.com/advisories/44913
http://secunia.com/advisories/44928
http://www.cyrusimap.org/docs/cyrus-imapd/2.4.7/changes.php
http://www.debian.org/security/2011/dsa-2242
http://www.debian.org/security/2011/dsa-2258
http://www.kb.cert.org/vuls/id/555316 US Government Resource
http://www.mandriva.com/security/advisories?name=MDVSA-2011:100
http://www.redhat.com/support/errata/RHSA-2011-0859.html
http://www.securitytracker.com/id?1025625
https://bugzilla.redhat.com/show_bug.cgi?id=705288 Patch
https://exchange.xforce.ibmcloud.com/vulnerabilities/67867

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2011-1926 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2011-1926 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference http://bugzilla.cyrusimap.org/show_bug.cgi?id=3423
    Added Reference http://bugzilla.cyrusimap.org/show_bug.cgi?id=3424
    Added Reference http://git.cyrusimap.org/cyrus-imapd/patch/?id=523a91a5e86c8b9a27a138f04a3e3f2d8786f162
    Added Reference http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061374.html
    Added Reference http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061415.html
    Added Reference http://openwall.com/lists/oss-security/2011/05/17/15
    Added Reference http://openwall.com/lists/oss-security/2011/05/17/2
    Added Reference http://secunia.com/advisories/44670
    Added Reference http://secunia.com/advisories/44876
    Added Reference http://secunia.com/advisories/44913
    Added Reference http://secunia.com/advisories/44928
    Added Reference http://www.cyrusimap.org/docs/cyrus-imapd/2.4.7/changes.php
    Added Reference http://www.debian.org/security/2011/dsa-2242
    Added Reference http://www.debian.org/security/2011/dsa-2258
    Added Reference http://www.kb.cert.org/vuls/id/555316
    Added Reference http://www.mandriva.com/security/advisories?name=MDVSA-2011:100
    Added Reference http://www.redhat.com/support/errata/RHSA-2011-0859.html
    Added Reference http://www.securitytracker.com/id?1025625
    Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=705288
    Added Reference https://exchange.xforce.ibmcloud.com/vulnerabilities/67867
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CPE Deprecation Remap by [email protected]

    Oct. 30, 2018

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:cmu:cyrus_imap_server:2.3.12p2:*:*:*:*:*:*:* OR *cpe:2.3:a:cmu:cyrus_imap_server:2.3.12:*:*:*:*:*:*:*
  • CPE Deprecation Remap by [email protected]

    Oct. 30, 2018

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:cmu:cyrus_imap_server:2.3.12p1:*:*:*:*:*:*:* OR *cpe:2.3:a:cmu:cyrus_imap_server:2.3.12:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Aug. 17, 2017

    Action Type Old Value New Value
    Removed Reference http://xforce.iss.net/xforce/xfdb/67867 [No Types Assigned]
    Added Reference https://exchange.xforce.ibmcloud.com/vulnerabilities/67867 [No Types Assigned]
  • Initial Analysis by [email protected]

    May. 24, 2011

    Action Type Old Value New Value
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2011-1926 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2011-1926 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

4.87 }} -5.09%

score

0.88551

percentile

CVSS2 - Vulnerability Scoring System
Access Vector
Access Complexity
Authentication
Confidentiality
Integrity
Availability
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Latest DB Update: May. 15, 2025 16:03