[RHSA-2012:0796-04] Moderate: rsyslog security, bug fix, and enhancement update

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Red Hat Security Advisory

 

Synopsis: Moderate: rsyslog security, bug fix, and enhancement update

Advisory ID: RHSA-2012:0796-04

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2012-0796.html

Issue date: 2012-06-20

CVE Names: CVE-2011-4623

=====================================================================

 

1. Summary:

 

Updated rsyslog packages that fix one security issue, multiple bugs, and

add two enhancements are now available for Red Hat Enterprise Linux 6.

 

The Red Hat Security Response Team has rated this update as having moderate

security impact. A Common Vulnerability Scoring System (CVSS) base score,

which gives a detailed severity rating, is available from the CVE link in

the References section.

 

2. Relevant releases/architectures:

 

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

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

Red Hat Enterprise Linux HPC Node (v. 6) - x86_64

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

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

 

3. Description:

 

The rsyslog packages provide an enhanced, multi-threaded syslog daemon.

 

A numeric truncation error, leading to a heap-based buffer overflow, was

found in the way the rsyslog imfile module processed text files containing

long lines. An attacker could use this flaw to crash the rsyslogd daemon

or, possibly, execute arbitrary code with the privileges of rsyslogd, if

they are able to cause a long line to be written to a log file that

rsyslogd monitors with imfile. The imfile module is not enabled by default.

(CVE-2011-4623)

 

Bug fixes:

 

* Several variables were incorrectly deinitialized with Transport Layer

Security (TLS) transport and keys in PKCS#8 format. The rsyslogd daemon

aborted with a segmentation fault when keys in this format were provided.

Now, the variables are correctly deinitialized. (BZ#727380)

 

* Previously, the imgssapi plug-in initialization was incomplete. As a

result, the rsyslogd daemon aborted when configured to provide a GSSAPI

listener. Now, the plug-in is correctly initialized. (BZ#756664)

 

* The fully qualified domain name (FQDN) for the localhost used in messages

was the first alias found. This did not always produce the expected result

on multihomed hosts. With this update, the algorithm uses the alias that

corresponds to the hostname. (BZ#767527)

 

* The gtls module leaked a file descriptor every time it was loaded due to

an error in the GnuTLS library. No new files or network connections could

be opened when the limit for the file descriptor count was reached. This

update modifies the gtls module so that it is not unloaded during the

process lifetime. (BZ#803550)

 

* rsyslog could not override the hostname to set an alternative hostname

for locally generated messages. Now, the local hostname can be overridden.

(BZ#805424)

 

* The rsyslogd init script did not pass the lock file path to the 'status'

action. As a result, the lock file was ignored and a wrong exit code was

returned. This update modifies the init script to pass the lock file to

the 'status' action. Now, the correct exit code is returned. (BZ#807608)

 

* Data could be incorrectly deinitialized when rsyslogd was supplied with

malformed spool files. The rsyslogd daemon could be aborted with a

segmentation fault. This update modifies the underlying code to correctly

deinitialize the data. (BZ#813079)

 

* Previously, deinitialization of non-existent data could, in certain error

cases, occur. As a result, rsyslogd could abort with a segmentation fault

when rsyslog was configured to use a disk assisted queue without specifying

a spool file. With this update, the error cases are handled gracefully.

(BZ#813084)

 

* The manual page wrongly stated that the '-d' option to turn on debugging

caused the daemon to run in the foreground, which was misleading as the

current behavior is to run in the background. Now, the manual page reflects

the correct behavior. (BZ#820311)

 

* rsyslog attempted to write debugging messages to standard output even

when run in the background. This resulted in the debugging information

being written to some other output. This was corrected and the debug

messages are no longer written to standard output when run in the

background. (BZ#820996)

 

* The string buffer to hold the distinguished name (DN) of a certificate

was too small. DNs with more than 128 characters were not displayed. This

update enlarges the buffer to process longer DNs. (BZ#822118)

 

Enhancements:

 

* Support for rate limiting and multi-line message capability. Now,

rsyslogd can limit the number of messages it accepts through a UNIX socket.

(BZ#672182)

 

* The addition of the "/etc/rsyslog.d/" configuration directory to supply

syslog configuration files. (BZ#740420)

 

All users of rsyslog are advised to upgrade to these updated packages,

which upgrade rsyslog to version 5.8.10 and correct these issues and add

these enhancements. After installing this update, the rsyslog daemon will

be restarted automatically.

 

4. 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/knowledge/articles/11258

 

5. Bugs fixed (http://bugzilla.redhat.com/):

 

740420 - Add a /etc/rsyslog.d config directory

769822 - CVE-2011-4623 rsyslog: DoS due integer signedness error while extending rsyslog counted string buffer

803550 - rsyslog fails to initialize gtls driver because of too many open files

813079 - rsyslog segfaults attempting to read a malformed / old format spool file

813084 - rsyslog segfaults when configured with disk queue with non-existent (unnamed) spool file

820311 - Manpage: rsyslogd does the fork in debug mode while manpage says otherwise

820996 - rsyslog writes debug messages to fd 1 even after forking

 

6. Package List:

 

Red Hat Enterprise Linux Desktop (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/rsyslog-5.8.10-2.el6.src.rpm

 

i386:

rsyslog-5.8.10-2.el6.i686.rpm

rsyslog-debuginfo-5.8.10-2.el6.i686.rpm

rsyslog-gnutls-5.8.10-2.el6.i686.rpm

rsyslog-gssapi-5.8.10-2.el6.i686.rpm

rsyslog-relp-5.8.10-2.el6.i686.rpm

 

x86_64:

rsyslog-5.8.10-2.el6.x86_64.rpm

rsyslog-debuginfo-5.8.10-2.el6.x86_64.rpm

rsyslog-gnutls-5.8.10-2.el6.x86_64.rpm

rsyslog-gssapi-5.8.10-2.el6.x86_64.rpm

rsyslog-relp-5.8.10-2.el6.x86_64.rpm

 

Red Hat Enterprise Linux Desktop Optional (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/rsyslog-5.8.10-2.el6.src.rpm

 

i386:

rsyslog-debuginfo-5.8.10-2.el6.i686.rpm

rsyslog-mysql-5.8.10-2.el6.i686.rpm

rsyslog-pgsql-5.8.10-2.el6.i686.rpm

rsyslog-snmp-5.8.10-2.el6.i686.rpm

 

x86_64:

rsyslog-debuginfo-5.8.10-2.el6.x86_64.rpm

rsyslog-mysql-5.8.10-2.el6.x86_64.rpm

rsyslog-pgsql-5.8.10-2.el6.x86_64.rpm

rsyslog-snmp-5.8.10-2.el6.x86_64.rpm

 

Red Hat Enterprise Linux HPC Node (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/rsyslog-5.8.10-2.el6.src.rpm

 

x86_64:

rsyslog-5.8.10-2.el6.x86_64.rpm

rsyslog-debuginfo-5.8.10-2.el6.x86_64.rpm

rsyslog-gnutls-5.8.10-2.el6.x86_64.rpm

rsyslog-gssapi-5.8.10-2.el6.x86_64.rpm

rsyslog-relp-5.8.10-2.el6.x86_64.rpm

 

Red Hat Enterprise Linux HPC Node Optional (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/rsyslog-5.8.10-2.el6.src.rpm

 

x86_64:

rsyslog-debuginfo-5.8.10-2.el6.x86_64.rpm

rsyslog-mysql-5.8.10-2.el6.x86_64.rpm

rsyslog-pgsql-5.8.10-2.el6.x86_64.rpm

rsyslog-snmp-5.8.10-2.el6.x86_64.rpm

 

Red Hat Enterprise Linux Server (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/rsyslog-5.8.10-2.el6.src.rpm

 

i386:

rsyslog-5.8.10-2.el6.i686.rpm

rsyslog-debuginfo-5.8.10-2.el6.i686.rpm

rsyslog-gnutls-5.8.10-2.el6.i686.rpm

rsyslog-gssapi-5.8.10-2.el6.i686.rpm

rsyslog-mysql-5.8.10-2.el6.i686.rpm

rsyslog-pgsql-5.8.10-2.el6.i686.rpm

rsyslog-relp-5.8.10-2.el6.i686.rpm

 

ppc64:

rsyslog-5.8.10-2.el6.ppc64.rpm

rsyslog-debuginfo-5.8.10-2.el6.ppc64.rpm

rsyslog-gnutls-5.8.10-2.el6.ppc64.rpm

rsyslog-gssapi-5.8.10-2.el6.ppc64.rpm

rsyslog-mysql-5.8.10-2.el6.ppc64.rpm

rsyslog-pgsql-5.8.10-2.el6.ppc64.rpm

rsyslog-relp-5.8.10-2.el6.ppc64.rpm

 

s390x:

rsyslog-5.8.10-2.el6.s390x.rpm

rsyslog-debuginfo-5.8.10-2.el6.s390x.rpm

rsyslog-gnutls-5.8.10-2.el6.s390x.rpm

rsyslog-gssapi-5.8.10-2.el6.s390x.rpm

rsyslog-mysql-5.8.10-2.el6.s390x.rpm

rsyslog-pgsql-5.8.10-2.el6.s390x.rpm

rsyslog-relp-5.8.10-2.el6.s390x.rpm

 

x86_64:

rsyslog-5.8.10-2.el6.x86_64.rpm

rsyslog-debuginfo-5.8.10-2.el6.x86_64.rpm

rsyslog-gnutls-5.8.10-2.el6.x86_64.rpm

rsyslog-gssapi-5.8.10-2.el6.x86_64.rpm

rsyslog-mysql-5.8.10-2.el6.x86_64.rpm

rsyslog-pgsql-5.8.10-2.el6.x86_64.rpm

rsyslog-relp-5.8.10-2.el6.x86_64.rpm

 

Red Hat Enterprise Linux Server Optional (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/rsyslog-5.8.10-2.el6.src.rpm

 

i386:

rsyslog-debuginfo-5.8.10-2.el6.i686.rpm

rsyslog-snmp-5.8.10-2.el6.i686.rpm

 

ppc64:

rsyslog-debuginfo-5.8.10-2.el6.ppc64.rpm

rsyslog-snmp-5.8.10-2.el6.ppc64.rpm

 

s390x:

rsyslog-debuginfo-5.8.10-2.el6.s390x.rpm

rsyslog-snmp-5.8.10-2.el6.s390x.rpm

 

x86_64:

rsyslog-debuginfo-5.8.10-2.el6.x86_64.rpm

rsyslog-snmp-5.8.10-2.el6.x86_64.rpm

 

Red Hat Enterprise Linux Workstation (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/rsyslog-5.8.10-2.el6.src.rpm

 

i386:

rsyslog-5.8.10-2.el6.i686.rpm

rsyslog-debuginfo-5.8.10-2.el6.i686.rpm

rsyslog-gnutls-5.8.10-2.el6.i686.rpm

rsyslog-gssapi-5.8.10-2.el6.i686.rpm

rsyslog-mysql-5.8.10-2.el6.i686.rpm

rsyslog-pgsql-5.8.10-2.el6.i686.rpm

rsyslog-relp-5.8.10-2.el6.i686.rpm

 

x86_64:

rsyslog-5.8.10-2.el6.x86_64.rpm

rsyslog-debuginfo-5.8.10-2.el6.x86_64.rpm

rsyslog-gnutls-5.8.10-2.el6.x86_64.rpm

rsyslog-gssapi-5.8.10-2.el6.x86_64.rpm

rsyslog-mysql-5.8.10-2.el6.x86_64.rpm

rsyslog-pgsql-5.8.10-2.el6.x86_64.rpm

rsyslog-relp-5.8.10-2.el6.x86_64.rpm

 

Red Hat Enterprise Linux Workstation Optional (v. 6):

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/rsyslog-5.8.10-2.el6.src.rpm

 

i386:

rsyslog-debuginfo-5.8.10-2.el6.i686.rpm

rsyslog-snmp-5.8.10-2.el6.i686.rpm

 

x86_64:

rsyslog-debuginfo-5.8.10-2.el6.x86_64.rpm

rsyslog-snmp-5.8.10-2.el6.x86_64.rpm

 

These packages are GPG signed by Red Hat for security. Our key and

details on how to verify the signature are available from

https://access.redhat.com/security/team/key/#package

 

7. References:

 

https://www.redhat.com/security/data/cve/CVE-2011-4623.html

https://access.redhat.com/security/updates/classification/#moderate

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2012 Red Hat, Inc.

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