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Red Hat RHSA-2011:0859-01 Moderate: cyrus-imapd Command Injection

red hat
Calendar Grey June 8, 2011
Dist Redhat Esm H88
Resolution for cyrus-imapd command injection vulnerability in Red Hat's moderate security patch. Updates released for RHEL versions 4, 5, and 6.
Updated cyrus-imapd packages that fix one security issue are now available for Red Hat Enterprise Linux 4, 5, and 6

Solution

Before applying this update, make sure all previously-released errata relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/kb/docs/DOC-11259

Summary

The cyrus-imapd packages contain a high-performance mail server with IMAP, POP3, NNTP, and Sieve support.
It was discovered that cyrus-imapd did not flush the received commands buffer after switching to TLS encryption for IMAP, LMTP, NNTP, and POP3 sessions. A man-in-the-middle attacker could use this flaw to inject protocol commands into a victim's TLS session initialization messages. This could lead to those commands being processed by cyrus-imapd, potentially allowing the attacker to steal the victim's mail or authentication credentials. (CVE-2011-1926)
Users of cyrus-imapd are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. After installing the update, cyrus-imapd will be restarted automatically.

Topics%20covered

Topics Covered

security advisory moderate Red Hat cyrus-imapd command injection

References

https://access.redhat.com/security/cve/CVE-2011-1926 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux AS version 4:
Source:
i386: cyrus-imapd-2.2.12-15.el4.i386.rpm cyrus-imapd-debuginfo-2.2.12-15.el4.i386.rpm cyrus-imapd-devel-2.2.12-15.el4.i386.rpm cyrus-imapd-murder-2.2.12-15.el4.i386.rpm cyrus-imapd-nntp-2.2.12-15.el4.i386.rpm cyrus-imapd-utils-2.2.12-15.el4.i386.rpm perl-Cyrus-2.2.12-15.el4.i386.rpm
ia64: cyrus-imapd-2.2.12-15.el4.ia64.rpm cyrus-imapd-debuginfo-2.2.12-15.el4.ia64.rpm cyrus-imapd-devel-2.2.12-15.el4.ia64.rpm cyrus-imapd-murder-2.2.12-15.el4.ia64.rpm cyrus-imapd-nntp-2.2.12-15.el4.ia64.rpm cyrus-imapd-utils-2.2.12-15.el4.ia64.rpm perl-Cyrus-2.2.12-15.el4.ia64.rpm
ppc: cyrus-imapd-2.2.12-15.el4.ppc.rpm cyrus-imapd-debuginfo-2.2.12-15.el4.ppc.rpm cyrus-imapd-devel-2.2.12-15.el4.ppc.rpm cyrus-imapd-murder-2.2.12-15.el4.ppc.rpm cyrus-imapd-nntp-2.2.12-15.el4.ppc.rpm cyrus-imapd-utils-2.2.12-15.el4.ppc.rpm perl-Cyrus-2.2.12-15.el4.ppc.rpm
s390: cyrus-imapd-2.2.12-15.el4.s390.rpm cyrus-imapd-debuginfo-2.2.12-15.el4.s390.rpm cyrus-imapd-devel-2.2.12-15.el4.s390.rpm cyrus-imapd-murder-2.2.12-15.el4.s390.rpm cyrus-imapd-nntp-2.2.12-15.el4.s390.rpm cyrus-imapd-utils-2.2.12-15.el4.s390.rpm perl-Cyrus-2.2.12-15.el4.s390.rpm
s390x: cyrus-imapd-2.2.12-15.el4.s390x.rpm cyrus-imapd-debuginfo-2.2.12-15.el4.s390x.rpm

Read the Full Advisory


Advisory ID: RHSA-2011:0859-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2011:0859.html
Issue date: 2011-06-08

Topic

Updated cyrus-imapd packages that fix one security issue are now availablefor Red Hat Enterprise Linux 4, 5, and 6.The Red Hat Security Response Team has rated this update as having moderatesecurity impact. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available from the CVE link inthe References section.

Topics%20covered

Topics Covered

security advisory moderate Red Hat cyrus-imapd command injection

Relevant Releases Architectures

RHEL Desktop Workstation (v. 5 client) - i386, x86_64

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64

Red Hat Enterprise Linux Desktop version 4 - i386, x86_64

Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64

Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64

Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64

Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64

Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

Bugs Fixed

705288 - CVE-2011-1926 cyrus-imapd: STARTTLS plaintext command injection

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