CVE-2011-1431

Public Exploit

Description

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.

6.8

CVSS

Severity: Medium

CVSS 2.0 •

EPSS 6.12% Top 10%

Vendor Advisory postfix.org Vendor Advisory vupen.com

Affected: n/a n/a

References

Link	Tags
https://exchange.xforce.ibmcloud.com/vulnerabilities/65932	vdb entry
http://www.kb.cert.org/vuls/id/MAPG-8D9M5Q	us government resource
http://inoa.net/qmail-tls/vu555316.patch	patch
http://www.postfix.org/CVE-2011-0411.html	exploit vendor advisory
http://www.vupen.com/english/advisories/2011/0612	vdb entry vendor advisory
http://www.securityfocus.com/bid/46767	vdb entry
http://www.kb.cert.org/vuls/id/555316	third party advisory us government resource
http://www.securityfocus.com/archive/1/516901	mailing list exploit
http://securityreason.com/securityalert/8144	third party advisory

Frequently Asked Questions

What is the severity of CVE-2011-1431?: CVE-2011-1431 has been scored as a medium severity vulnerability.
How to fix CVE-2011-1431?: To fix CVE-2011-1431, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2011-1431 being actively exploited in the wild?: It is possible that CVE-2011-1431 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~6% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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