CVE-2011-1926
Summary
| CVE | CVE-2011-1926 |
|---|---|
| State | PUBLISHED |
| Assigner | redhat |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2011-05-23 22:55:01 UTC |
| Updated | 2026-04-29 01:13:23 UTC |
| 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. |
Risk And Classification
CVSS v2.0 Breakdown
Access Vector
NetworkAccess Complexity
HighAuthentication
NoneConfidentiality
PartialIntegrity
PartialAvailability
PartialAV:N/AC:H/Au:N/C:P/I:P/A:P
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Cmu | Cyrus Imap Server | 2.0.17 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.1.16 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.1.17 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.1.18 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.2.10 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.2.11 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.2.12 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.2.13 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.2.13p1 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.2.8 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.2.9 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.3.0 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.3.1 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.3.10 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.3.11 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.3.12 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.3.13 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.3.14 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.3.15 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.3.16 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.3.2 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.3.3 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.3.4 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.3.5 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.3.6 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.3.7 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.3.8 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.3.9 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.4.0 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.4.1 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.4.2 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.4.3 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.4.4 | All | All | All |
| Application | Cmu | Cyrus Imap Server | 2.4.5 | All | All | All |
| Application | Cmu | Cyrus Imap Server | All | All | All | All |
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| IBM X-Force Exchange | af854a3a-2127-422b-91ae-364da2661108 | exchange.xforce.ibmcloud.com | |
| No page found | af854a3a-2127-422b-91ae-364da2661108 | bugzilla.cyrusimap.org | Patch |
| Support | af854a3a-2127-422b-91ae-364da2661108 | www.redhat.com | |
| Debian -- Security Information -- DSA-2258-1 kolab-cyrus-imapd | af854a3a-2127-422b-91ae-364da2661108 | www.debian.org | |
| oss-security - CVE Request -- Cyrus-IMAP STARTTLS issue -- [was: Re: pure-ftpd STARTTLS command injection / new CVE?] | af854a3a-2127-422b-91ae-364da2661108 | openwall.com | Patch |
| No page found | af854a3a-2127-422b-91ae-364da2661108 | git.cyrusimap.org | Patch |
| No page found | af854a3a-2127-422b-91ae-364da2661108 | bugzilla.cyrusimap.org | Patch |
| [SECURITY] Fedora 14 Update: cyrus-imapd-2.3.16-8.fc14 | af854a3a-2127-422b-91ae-364da2661108 | lists.fedoraproject.org | |
| Project Cyrus | af854a3a-2127-422b-91ae-364da2661108 | www.cyrusimap.org | |
| Support / Security / Advisories / / MDVSA-2011:100 | Mandriva | af854a3a-2127-422b-91ae-364da2661108 | www.mandriva.com | |
| Debian update for kolab-cyrus-imapd - Secunia.com | af854a3a-2127-422b-91ae-364da2661108 | secunia.com | |
| Red Hat update for cyrus-imapd - Secunia.com | af854a3a-2127-422b-91ae-364da2661108 | secunia.com | |
| Cyrus IMAP Server STARTTLS Buffer Flushing Flaw Lets Remote Users Inject Commands via Man-in-the-Middle Attacks - SecurityTracker | af854a3a-2127-422b-91ae-364da2661108 | www.securitytracker.com | |
| 705288 – (CVE-2011-1926) CVE-2011-1926 cyrus-imapd: STARTTLS plaintext command injection | af854a3a-2127-422b-91ae-364da2661108 | bugzilla.redhat.com | Patch |
| oss-security - Re: CVE Request -- Cyrus-IMAP STARTTLS issue -- [was: Re: pure-ftpd STARTTLS command injection / new CVE?] | af854a3a-2127-422b-91ae-364da2661108 | openwall.com | Patch |
| Debian update for cyrus-imapd-2.2 - Secunia.com | af854a3a-2127-422b-91ae-364da2661108 | secunia.com | |
| US-CERT Vulnerability Note VU#555316 - STARTTLS plaintext command injection vulnerability | af854a3a-2127-422b-91ae-364da2661108 | www.kb.cert.org | US Government Resource |
| Debian -- Security Information -- DSA-2242-1 cyrus-imapd-2.2 | af854a3a-2127-422b-91ae-364da2661108 | www.debian.org | |
| [SECURITY] Fedora 13 Update: cyrus-imapd-2.3.16-5.fc13 | af854a3a-2127-422b-91ae-364da2661108 | lists.fedoraproject.org | |
| Fedora update for cyrus-imapd - Secunia.com | af854a3a-2127-422b-91ae-364da2661108 | secunia.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.