CVE-2011-1926
MEDIUM · CVSS 5.1EPSS 4.0%EU EUVD
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.
Key facts
- CVSS score
- 5.1 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:H/Au:N/C:P/I:P/A:P- Weakness (CWE)
- CWE-264
- EPSS score
- 4.0% (91th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2011-1924)
- Published
- May 23, 2011
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2011-1924 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.
View on the EU Vulnerability DatabaseAffected products
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
- cmu / cyrus imap server
References
- 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
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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