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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 1.0...

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.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysis

Security readout for executives and security teams

This flaw affects the STARTTLS handling described for the netqmail 1.06 TLS patch. A network attacker positioned between mail systems could cause a plaintext SMTP command to be accepted after encryption starts, weakening session integrity. The sources do not provide CVSS, broad product impact, or active exploitation evidence. Likely exposure is limited to SMTP servers using the netqmail 1.06 TLS patch implementation named in the CVE. The supplied affected-products metadata is incomplete and lists no CPEs, so inventory confirmation is required. Treat as a targeted mail-infrastructure risk, not an internet-wide emergency based on supplied evidence. Prioritize discovery of legacy qmail deployments and remediate confirmed affected systems during normal vulnerability management windows unless business exposure is high. Mitigation focus: Inventory SMTP servers for netqmail 1.06 and the netqmail-1.06-tls patch.; Review and test the referenced qmail-tls VU#555316 patch before production use.; Check CERT and vendor guidance for applicable STARTTLS fixes..

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors
0Timeline events
0ADP providers
2Source links

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Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

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