Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-2011.0561
cyrus-imapd-2.2 security update
26 May 2011
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AusCERT Security Bulletin Summary
---------------------------------
Product: cyrus-imapd-2.2
Publisher: Debian
Operating System: Debian GNU/Linux 5
Debian GNU/Linux 6
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Provide Misleading Information -- Remote with User Interaction
Unauthorised Access -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2011-1926
Original Bulletin:
http://www.debian.org/security/2010/dsa-2242
Comment: This advisory references vulnerabilities in products which run on
platforms other than Debian. It is recommended that administrators
running cyrus-imapd-2.2 check for an updated version of the software
for their operating system.
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Debian Security Advisory DSA-2242-1 security@debian.org
http://www.debian.org/security/ Moritz Muehlenhoff
May 25, 2011 http://www.debian.org/security/faq
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Package : cyrus-imapd-2.2
Vulnerability : implementation error
Problem type : remote
Debian-specific: no
CVE ID : CVE-2011-1926
Debian Bug : 627081
It was discovered that the STARTTLS implementation of the Cyrus IMAP
server does not properly restrict I/O buffering, which allows
man-in-the-middle attackers to insert commands into encrypted IMAP,
LMTP, NNTP and POP3 sessions by sending a cleartext command that is
processed after TLS is in place.
For the oldstable distribution (lenny), this problem has been fixed in
version 2.2.13-14+lenny4.
For the stable distribution (squeeze), this problem has been fixed in
version 2.2.13-19+squeeze1.
For the unstable distribution (sid), this problem has been fixed in
version 2.2.13p1-11 for cyrus-imapd-2.2 and in version 2.4.7-1
for cyrus-imapd-2.4.
We recommend that you upgrade your cyrus-imapd-2.2 packages.
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/
Mailing list: debian-security-announce@lists.debian.org
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