CVE-2012-3523: Command Injection
The STARTTLS implementation in nnrpd in INN before 2.5.3 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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2012-3523?
CVE-2012-3523 has a medium severity rating that enables man-in-the-middle attacks.
How do I fix CVE-2012-3523?
To mitigate CVE-2012-3523, upgrade to INN version 2.5.3 or later.
Which versions of INN are affected by CVE-2012-3523?
CVE-2012-3523 affects INN versions before 2.5.3, including 1.4 and all prior 2.x versions.
What type of attack does CVE-2012-3523 allow?
CVE-2012-3523 allows attackers to perform plaintext command injection during encrypted sessions.
Is there a workaround for CVE-2012-3523 if I cannot upgrade?
A temporary workaround for CVE-2012-3523 is to limit the use of STARTTLS until an upgrade can be performed.