cyrus-imapd: STARTTLS plaintext command injection
Published May 23, 2011
5.1
MEDIUMCVSS 2.0
EPSS 4.00%
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.
Affected products
No data.
- ≤ 2.4.6
- 2.0.17
- 2.1.16
- 2.1.17
- 2.1.18
- 2.2.8
- 2.2.9
- 2.2.10
- 2.2.11
- 2.2.12
- 2.2.13
- 2.2.13p1
- 2.3.0
- 2.3.1
- 2.3.2
- 2.3.3
- 2.3.4
- 2.3.5
- 2.3.6
- 2.3.7
- 2.3.8
- 2.3.9
- 2.3.10
- 2.3.11
- 2.3.12
- 2.3.13
- 2.3.14
- 2.3.15
- 2.3.16
- 2.4.0
- 2.4.1
- 2.4.2
- 2.4.3
- 2.4.4
- 2.4.5
No data.
Red Hat Enterprise Linux 4
cyrus-imapd-0:2.2.12-15.el4
Fixed · RHSA-2011:0859
Red Hat Enterprise Linux 5
cyrus-imapd-0:2.3.7-7.el5_6.4
Fixed · RHSA-2011:0859
Red Hat Enterprise Linux 6
cyrus-imapd-0:2.3.16-6.el6_1.2
Fixed · RHSA-2011:0859
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 4 | cyrus-imapd-0:2.2.12-15.el4 | Fixed | RHSA-2011:0859 |
| Red Hat Enterprise Linux 5 | cyrus-imapd-0:2.3.7-7.el5_6.4 | Fixed | RHSA-2011:0859 |
| Red Hat Enterprise Linux 6 | cyrus-imapd-0:2.3.16-6.el6_1.2 | Fixed | RHSA-2011:0859 |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:H/Au:N/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.00% (0.03999) | 90.21th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.00% (0.03999) | 89.16th | v5 (v2026.06.15) |
| Mar 30, 2025 | 4.87% (0.04867) | 88.55th | v4 (v2025.03.14) |
| Mar 29, 2025 | 9.95% (0.09954) | 88.29th | v4 (v2025.03.14) |
| Mar 25, 2025 | 4.87% (0.04867) | 88.49th | v4 (v2025.03.14) |
| Mar 17, 2025 | 3.84% (0.03843) | 87.40th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.07% (0.01073) | 84.89th | v3 (v2023.03.01) |
| Apr 9, 2024 | 1.07% (0.01073) | 83.98th | v3 (v2023.03.01) |
| Mar 7, 2023 | 1.07% (0.01073) | 81.98th | v3 (v2023.03.01) |
| Mar 6, 2023 | 6.09% (0.06088) | 90.58th | v2 (v2022.01.01) |
| Apr 1, 2022 | 6.09% (0.06088) | 89.70th | v2 (v2022.01.01) |
| Feb 4, 2022 | 6.09% (0.06088) | 77.55th | v2 (v2022.01.01) |
References (23)
- http://bugzilla.cyrusimap.org/show_bug.cgi?id=3423 x_refsource_CONFIRMPatch
- http://bugzilla.cyrusimap.org/show_bug.cgi?id=3424 x_refsource_CONFIRMPatch
- http://git.cyrusimap.org/cyrus-imapd/patch/?id=523a91a5e86c8b9a27a138f04a3e3f2d8786f162 x_refsource_CONFIRMPatch
- http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061374.html vendor-advisoryx_refsource_FEDORA
- http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061415.html vendor-advisoryx_refsource_FEDORA
- http://openwall.com/lists/oss-security/2011/05/17/15 mailing-listx_refsource_MLISTPatch
- http://openwall.com/lists/oss-security/2011/05/17/2 mailing-listx_refsource_MLISTPatch
- http://secunia.com/advisories/44670 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/44876 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/44913 third-party-advisoryx_refsource_SECUNIA
- http://secunia.com/advisories/44928 third-party-advisoryx_refsource_SECUNIA
- http://www.cyrusimap.org/docs/cyrus-imapd/2.4.7/changes.php x_refsource_CONFIRM
- http://www.debian.org/security/2011/dsa-2242 vendor-advisoryx_refsource_DEBIAN
- http://www.debian.org/security/2011/dsa-2258 vendor-advisoryx_refsource_DEBIAN
- http://www.kb.cert.org/vuls/id/555316 third-party-advisoryx_refsource_CERT-VNUS Government Resource
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:100 vendor-advisoryx_refsource_MANDRIVA
- http://www.redhat.com/support/errata/RHSA-2011-0859.html vendor-advisoryx_refsource_REDHAT
- http://www.securitytracker.com/id?1025625 vdb-entryx_refsource_SECTRACK
- https://access.redhat.com/security/cve/CVE-2011-1926 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=705288 x_refsource_CONFIRMPatchIssue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/67867 vdb-entryx_refsource_XF
- https://nvd.nist.gov/vuln/detail/CVE-2011-1926
- https://www.cve.org/CVERecord?id=CVE-2011-1926
Change history (0)
No recorded changes yet.