Bug 705288 - (CVE-2011-1926) CVE-2011-1926 cyrus-imapd: STARTTLS plaintext command injection
CVE-2011-1926 cyrus-imapd: STARTTLS plaintext command injection
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
: Security
Depends On: 705294 705774 705775 705776 705777 705778 844261
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Reported: 2011-05-17 05:39 EDT by Jan Lieskovsky
Modified: 2015-11-24 09:39 EST (History)
4 users (show)

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Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2013-02-28 16:32:42 EST
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RHEL 7.3 requirements from Atomic Host:
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Description Jan Lieskovsky 2011-05-17 05:39:52 EDT
It was found, that Cyrus IMAP recognized IMAP, LMTP, NNTP and POP3
protocol commands during plaintex to TLS session switch (by TLS protocol
initialization). A remote attacker could use this flaw to insert
plaintext, protocol relevant, commands into TLS protocol initialization
messages, leading to execution of these commands during the ciphertext
protocol phase, potentially allowing the attacker to steal the victim's
mail or authentication credentials.

[1] http://www.kb.cert.org/vuls/id/555316
[2] http://bugzilla.cyrusimap.org/show_bug.cgi?id=3423

Relevant upstream patch:
[3] http://git.cyrusimap.org/cyrus-imapd/patch/?id=523a91a5e86c8b9a27a138f04a3e3f2d8786f162
Comment 1 Jan Lieskovsky 2011-05-17 05:42:24 EDT
This issue affects the versions of the cyrus-imapd package, as shipped
with Red Hat Enterprise Linux 4, 5, and 6.


This issue affects the versions of the cyrus-imapd package, as shipped
with Fedora release of 13 and 14. Please schedule an update.
Comment 2 Jan Lieskovsky 2011-05-17 05:57:31 EDT
CVE Request:
[4] http://www.openwall.com/lists/oss-security/2011/05/17/2
Comment 3 Jan Lieskovsky 2011-05-17 05:58:27 EDT
Created cyrus-imapd tracking bugs for this issue

Affects: fedora-all [bug 705294]
Comment 4 Vincent Danen 2011-05-17 19:37:59 EDT
This was assigned CVE-2011-1926.
Comment 7 errata-xmlrpc 2011-06-08 11:26:07 EDT
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5
  Red Hat Enterprise Linux 4
  Red Hat Enterprise Linux 6

Via RHSA-2011:0859 https://rhn.redhat.com/errata/RHSA-2011-0859.html

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