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CVE-2011-1431
The STARTTLS implementation in qmail-smtpd.c in qmail-smtpd in the netqmail-1.06-tls patch for netqmail 1.06 does not properly restrict…
Medium6.8EPSS 4.6%
- Published
- Updated
- Reserved
- Assigned by
- mitre
Description
The STARTTLS implementation in qmail-smtpd.c in qmail-smtpd in the netqmail-1.06-tls patch for netqmail 1.06 does not properly restrict I/O buffering, which allows man-in-the-middle attackers to insert commands into encrypted SMTP 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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
- EPSS (exploitation in 30 days)
- 4.6% · top 8.3% of all CVEs (4 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.8.
Weakness
- n/a
Affected products
n/a
- affected n/a
References (9)
- multiple-starttls-command-execution(65932) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- http://www.kb.cert.org/vuls/id/MAPG-8D9M5Q (opens in a new tab)x_refsource_MISCx_transferred
- http://inoa.net/qmail-tls/vu555316.patch (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://www.postfix.org/CVE-2011-0411.html (opens in a new tab)x_refsource_MISCx_transferred
- ADV-2011-0612 (opens in a new tab)vdb-entryx_refsource_VUPENx_transferred
- 46767 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- VU#555316 (opens in a new tab)third-party-advisoryx_refsource_CERT-VNx_transferred
- 20110307 Plaintext injection in STARTTLS (multiple implementations) (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- 8144 (opens in a new tab)third-party-advisoryx_refsource_SREASONx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2011-1431)Record last updated .