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CVE-2011-1430· NVD / CVE Program· CNA mitre

The STARTTLS implementation in the server in Ipswitch IMail 11.03 and earlier does not properly restrict I/O buffering, which allows man-in-

The STARTTLS implementation in the server in Ipswitch IMail 11.03 and earlier 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.

MediumCVSS 6.8 · v2.0—No exploit No fix recorded
Published
Mar 16, 2011
Updated
Jun 16, 2026
EPSS
3.2% · 88th percentile
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Report tools

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Action score

28

Monitor

Low priority for now.

CVSS
27 / 40 · 6.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
1 / 30 · 3.2%

Affected systems

VendorProduct
ipswitchimail

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • ipswitch imailall versions
  • ipswitch imailup to 11.03 inclusive
  • ipswitch imail10
  • ipswitch imail10.01
  • ipswitch imail10.02
  • ipswitch imail11
  • ipswitch imail11.01
  • ipswitch imail11.02
  • ipswitch imail2006
  • ipswitch imail2006.1
  • ipswitch imail2006.2
  • ipswitch imail5.0
  • ipswitch imail5.0.5
  • ipswitch imail5.0.6
  • ipswitch imail5.0.7
  • ipswitch imail5.0.8
  • ipswitch imail6.0
  • ipswitch imail6.0.1
  • ipswitch imail6.0.2
  • ipswitch imail6.0.3

Same product

ipswitch: all records

Other highest-scoring records for the same primary product.

  • CVE-2004-0297Buffer overflow in the Lightweight Directory Access Protocol (LDAP) daemon (iLDAP.exe 3.9.15.10) in Ipswitch IMail Server 8.03 allows remote
    60This week
  • CVE-2005-1256Stack-based buffer overflow in the IMAP daemon (IMAPD32.EXE) in IMail 8.13 in Ipswitch Collaboration Suite (ICS), and other versions before
    58Plan
  • CVE-2005-1255Multiple stack-based buffer overflows in the IMAP server in IMail 8.12 and 8.13 in Ipswitch Collaboration Suite (ICS), and other versions be
    53Plan
  • CVE-2004-1520Stack-based buffer overflow in IPSwitch IMail 8.13 allows remote authenticated users to execute arbitrary code via a long IMAP DELETE comman
    45Plan
  • CVE-1999-1046Buffer overflow in IMonitor in IMail 5.0 allows remote attackers to cause a denial of service, and possibly execute arbitrary commands, via
    44Plan
  • CVE-2007-2795Multiple buffer overflows in Ipswitch IMail before 2006.21 allow remote attackers or authenticated users to execute arbitrary code via (1) t
    43Plan

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

    If successful

    Confidentiality
    P · data can be read
    Integrity
    P · data or configuration can be modified
    Availability
    P · the service can be disrupted
    Attack complexity
    M
    Confidentiality impact
    P
    Integrity impact
    P
    Availability impact
    P

    Weakness class (CWE)

    CWE-20 · Improper Input Validation

    CVSS vector

    AV:N/AC:M/Au:N/C:P/I:P/A:P

    nvd-primary

    Attack context

    MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

    Noroxi analysis

    No Noroxi analysis for this record yet

    We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

    We use this product, ask for help

    Change log

    No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

    References

    Vendor advisories and official records. Exploit/PoC links are deliberately left out.

    All records