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Red Hat Enterprise Linux: RHSA-2011:1187-01 Moderate: Dovecot DoS

red hat
Calendar Grey August 18, 2011
Scroller Redhat Esm H88
Ubuntu releases a critical notice regarding Postfix security patch that resolves a vulnerability posing risks to system integrity.
Updated dovecot 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

Dovecot is an IMAP server for Linux, UNIX, and similar operating systems, primarily written with security in mind.
A denial of service flaw was found in the way Dovecot handled NULL characters in certain header names. A mail message with specially-crafted headers could cause the Dovecot child process handling the target user's connection to crash, blocking them from downloading the message successfully and possibly leading to the corruption of their mailbox. (CVE-2011-1929)
Users of dovecot are advised to upgrade to these updated packages, which contain a backported patch to resolve this issue. After installing the updated packages, the dovecot service will be restarted automatically.

Topics%20covered

Topics Covered

security advisory denial of service security update software patch Red Hat Enterprise Linux moderate severity Dovecot

References

https://access.redhat.com/security/cve/CVE-2011-1929 https://access.redhat.com/security/updates/classification/#moderate

Package List

Red Hat Enterprise Linux AS version 4:
Source:
i386: dovecot-0.99.11-10.EL4.i386.rpm dovecot-debuginfo-0.99.11-10.EL4.i386.rpm
ia64: dovecot-0.99.11-10.EL4.ia64.rpm dovecot-debuginfo-0.99.11-10.EL4.ia64.rpm
ppc: dovecot-0.99.11-10.EL4.ppc.rpm dovecot-debuginfo-0.99.11-10.EL4.ppc.rpm
s390: dovecot-0.99.11-10.EL4.s390.rpm dovecot-debuginfo-0.99.11-10.EL4.s390.rpm
s390x: dovecot-0.99.11-10.EL4.s390x.rpm dovecot-debuginfo-0.99.11-10.EL4.s390x.rpm
x86_64: dovecot-0.99.11-10.EL4.x86_64.rpm dovecot-debuginfo-0.99.11-10.EL4.x86_64.rpm
Red Hat Enterprise Linux Desktop version 4:
Source:
i386: dovecot-0.99.11-10.EL4.i386.rpm dovecot-debuginfo-0.99.11-10.EL4.i386.rpm
x86_64: dovecot-0.99.11-10.EL4.x86_64.rpm dovecot-debuginfo-0.99.11-10.EL4.x86_64.rpm
Red Hat Enterprise Linux ES version 4:
Source:
i386: dovecot-0.99.11-10.EL4.i386.rpm dovecot-debuginfo-0.99.11-10.EL4.i386.rpm
ia64: dovecot-0.99.11-10.EL4.ia64.rpm dovecot-debuginfo-0.99.11-10.EL4.ia64.rpm
x86_64: dovecot-0.99.11-10.EL4.x86_64.rpm dovecot-debuginfo-0.99.11-10.EL4.x86_64.rpm
Red Hat Enterprise Linux WS version 4:
Source:
i386: dovecot-0.99.11-10.EL4.i386.rpm dovecot-debuginfo-0.99.11-10.EL4.i386.rpm
ia64: dovecot-0.99.11-10.EL4.ia64.rpm dovecot-debuginfo-0.99.11-10.EL4.ia64.rpm
x86_64:

Read the Full Advisory


Advisory ID: RHSA-2011:1187-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2011:1187.html
Issue date: 2011-08-18

Topic

Updated dovecot packages that fix one security issue are now available forRed 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 denial of service security update software patch Red Hat Enterprise Linux moderate severity Dovecot

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

706286 - CVE-2011-1929 dovecot: potential crash when parsing header names that contain NUL characters

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