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CVE-2011-1926

UnknownEPSS 4.00%

Last modified

CVE-2011-1926 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 4.00% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
4.00%

89.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
CmuCyrus Imap Server<= 2.4.6
CmuCyrus Imap Server2.0.17
CmuCyrus Imap Server2.1.16
CmuCyrus Imap Server2.1.17
CmuCyrus Imap Server2.1.18
CmuCyrus Imap Server2.2.8
CmuCyrus Imap Server2.2.9
CmuCyrus Imap Server2.2.10
CmuCyrus Imap Server2.2.11
CmuCyrus Imap Server2.2.12
CmuCyrus Imap Server2.2.13
CmuCyrus Imap Server2.2.13p1
CmuCyrus Imap Server2.3.0
CmuCyrus Imap Server2.3.1
CmuCyrus Imap Server2.3.2
CmuCyrus Imap Server2.3.3
CmuCyrus Imap Server2.3.4
CmuCyrus Imap Server2.3.5
CmuCyrus Imap Server2.3.6
CmuCyrus Imap Server2.3.7
CmuCyrus Imap Server2.3.8
CmuCyrus Imap Server2.3.9
CmuCyrus Imap Server2.3.10
CmuCyrus Imap Server2.3.11
CmuCyrus Imap Server2.3.12
CmuCyrus Imap Server2.3.13
CmuCyrus Imap Server2.3.14
CmuCyrus Imap Server2.3.15
CmuCyrus Imap Server2.3.16
CmuCyrus Imap Server2.4.0
CmuCyrus Imap Server2.4.1
CmuCyrus Imap Server2.4.2
CmuCyrus Imap Server2.4.3
CmuCyrus Imap Server2.4.4
CmuCyrus Imap Server2.4.5

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2011-1926?
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.
How severe is CVE-2011-1926?
Severity scoring for CVE-2011-1926 is pending analysis. The EPSS model estimates a 4.00% probability of exploitation in the next 30 days.
How do I fix CVE-2011-1926?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2011-1926?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST