CVE-2011-1926

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.

Category

5.1
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 4.87% Top 15%
Vendor Advisory redhat.com Vendor Advisory fedoraproject.org Vendor Advisory debian.org Vendor Advisory mandriva.com Vendor Advisory fedoraproject.org Vendor Advisory debian.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.redhat.com/support/errata/RHSA-2011-0859.html vendor advisory
http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061374.html vendor advisory
http://www.debian.org/security/2011/dsa-2258 vendor advisory
http://www.cyrusimap.org/docs/cyrus-imapd/2.4.7/changes.php
http://www.mandriva.com/security/advisories?name=MDVSA-2011:100 vendor advisory
http://lists.fedoraproject.org/pipermail/package-announce/2011-June/061415.html vendor advisory
http://www.securitytracker.com/id?1025625 vdb entry
http://bugzilla.cyrusimap.org/show_bug.cgi?id=3423 patch
http://www.debian.org/security/2011/dsa-2242 vendor advisory
http://secunia.com/advisories/44876 third party advisory
http://openwall.com/lists/oss-security/2011/05/17/2 mailing list patch
http://www.kb.cert.org/vuls/id/555316 third party advisory us government resource
http://secunia.com/advisories/44928 third party advisory
http://secunia.com/advisories/44913 third party advisory
http://bugzilla.cyrusimap.org/show_bug.cgi?id=3424 patch
http://secunia.com/advisories/44670 third party advisory
https://bugzilla.redhat.com/show_bug.cgi?id=705288 patch
https://exchange.xforce.ibmcloud.com/vulnerabilities/67867 vdb entry
http://git.cyrusimap.org/cyrus-imapd/patch/?id=523a91a5e86c8b9a27a138f04a3e3f2d8786f162 patch
http://openwall.com/lists/oss-security/2011/05/17/15 mailing list patch

Frequently Asked Questions

What is the severity of CVE-2011-1926?
CVE-2011-1926 has been scored as a medium severity vulnerability.
How to fix CVE-2011-1926?
To fix CVE-2011-1926, 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-2011-1926 being actively exploited in the wild?
It is possible that CVE-2011-1926 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~5% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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