The vixie-cron package contains the Vixie version of cron. Cron is a standard UNIX daemon that runs specified programs at scheduled times.
A denial of service(DoS) bug was found in the way vixie-cron verifies crontab file integrity. A local user with the ability to create a hardlink to /etc/crontab can prevent vixie-cron from executing certain system cron jobs. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2007-1856 to this issue.
More information about these vulnerabilities can be found in the security advisory issued by RedHat Linux:
| Product: | Affected Version(s): | Risk Level: | Actions: |
|---|---|---|---|
| Avaya Communication Manager | CM 2.x, 3.x, 4.x | Low | Customers should upgrade to CM 5.0 or later. |
| Avaya Intuity LX | All | Low | Customers should upgrade to IALX 2.0 SP2 or later. |
| Avaya EMMC | All | Low | Will not be addressed since no further releases of EMMC are planned. |
| Avaya Messaging Storage Server | MSS 4.0 and earlier | Low | Customers should upgrade to MSS 5.0 or later. |
| Avaya Message Networking | All | Low | See recommended actions below. This issue will be addressed in accordance with Avaya's Product Security Vulnerability Response Policy |
| Avaya CCS/SES | All | Low | Customers should upgrade to SES 5.0 or later. |
| Avaya AES | AES 3.1.3, 4.01, 4.1 | Low | Customers running AES 3.1.3 should upgrade to AES 3.1.4 or
later. Customers running AES 4.01 or 4.1 should upgrade to AES 4.2 or later. |
Recommended Actions:
For all system products which use
vulnerable versions of
vixie-cron, Avaya recommends that customers restrict local
and network access to the server. This restriction should be
enforced through the use of physical security, firewalls, ACLs,
VPNs, and other generally-accepted networking practices until such
time as an update becomes available and can be installed.
Avaya software-only products operate on general-purpose operating systems. Occasionally vulnerabilities may be discovered in the underlying operating system or applications that come with the operating system. These vulnerabilities often do not impact the software-only product directly but may threaten the integrity of the underlying platform.
In the case of this advisory Avaya software-only products are not affected by the vulnerability directly but the underlying Linux platform may be. Customers should determine on which Linux operating system the product was installed and then follow that vendor's guidance.
| Product: | Affected Version(s): | Risk Level: | Actions: |
|---|---|---|---|
| CVLAN | All | None | Depending on the Operating System provided by customers, the affected package may be installed on the underlying Operating System supporting the CVLAN application. The CVLAN application does not require the software described in this advisory. |
| Avaya Integrated Management Suite(IMS) | All | None | Depending on the Operating System provided by customers, the affected package may be installed on the underlying Operating System supporting the IMS application. The IMS application does not require the software described in this advisory. |
Recommended Actions:
Avaya recommends that customers follow
recommended actions supplied by RedHat Linux or remove the affected
package.
Additional information may also be available via the Avaya support website and through your Avaya account representative. Please contact your Avaya product support representative, or dial 1-800-242-2121, with any questions.
ALL INFORMATION IS BELIEVED TO BE CORRECT AT THE TIME OF PUBLICATION AND IS PROVIDED "AS IS". AVAYA INC., ON BEHALF ITSELF AND ITS SUBSIDIARIES AND AFFILIATES (HEREINAFTER COLLECTIVELY REFERRED TO AS "AVAYA"), DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND FURTHERMORE, AVAYA MAKES NO REPRESENTATIONS OR WARRANTIES THAT THE STEPS RECOMMENDED WILL ELIMINATE SECURITY OR VIRUS THREATS TO CUSTOMERS' SYSTEMS. IN NO EVENT SHALL AVAYA BE LIABLE FOR ANY DAMAGES WHATSOEVER ARISING OUT OF OR IN CONNECTION WITH THE INFORMATION OR RECOMMENDED ACTIONS PROVIDED HEREIN, INCLUDING DIRECT, INDIRECT, INCIDENTAL, STATUTORY, CONSEQUENTIAL DAMAGES, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF AVAYA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
THE INFORMATION PROVIDED HERE DOES NOT AFFECT THE SUPPORT AGREEMENTS IN PLACE FOR AVAYA PRODUCTS. SUPPORT FOR AVAYA PRODUCTS CONTINUES TO BE EXECUTED AS PER EXISTING AGREEMENTS WITH AVAYA.
V 1.0 - June 19, 2007 - Initial Statement issued.
V 2.0 - October 22 - Changed Advisory Status to Interim.
V 3.0 - July 24, 2008 - Changed AES affected versions, changed AES, CM,
and SES recommended actions.
V 4.0 - December 22, 2008 - Changed IALX and EMMC recommended
actions.
V 5.0 - February 19, 2009 - Changed MSS affected versions and
recommended
actions.
Send information regarding any discovered security problems with Avaya products to either the contact noted in the product's documentation or [email protected].
© 2007 Avaya Inc. All Rights Reserved. All trademarks identified by the ® or ™ are registered trademarks or trademarks, respectively, of Avaya Inc. All other trademarks are the property of their respective owners.