CVE-2011-1432: The STARTTLS implementation in SCO SCOoffice Server does not properly restrict I/O buffering, which allows man

This month

MEDIUM 6.8MITIGATE

CVE-2011-1432 is a medium-severity flaw (CVSS 6.8) affecting scoofficeserver. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The STARTTLS implementation in SCO SCOoffice Server 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.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.8 (Medium)
EPSS exploit chance	2.3% (top 17%)
CISA exploited list	No
Published	2011-03-16
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: sco

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2011-03-16 22:55 UTCPublished CVE record published
2026-06-16 23:29 UTCUpdated Record last modified

sco scoofficeserver MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy scoofficeserver || rpm -q scoofficeserver || scoofficeserver --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2011-1432?

scoofficeserver: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2011-1432 being exploited?

CVE-2011-1432 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2011-1432 affect?

CVE-2011-1432 affects scoofficeserver. Severity is medium (CVSS 6.8). The STARTTLS implementation in SCO SCOoffice Server 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 TL

How urgent is CVE-2011-1432?

Priority 45/100. No elevated risk signals yet.

References

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