ASA-2011-337 (WIND00269526 WIND00294088 WIND00299596 WIND00269520)

Wind River Linux xmlsec, DHCP, freetype, Perl Security Update (WIND00269526 WIND00294088 WIND00299596 WIND00269520)

Original Release Date: November 7, 2011
Last Revised: May 5, 2016
Number: ASA-2011-337
Risk Level: Low
Advisory Version: 2.0
Advisory Status: Final

1. Overview:

Wind River has released a security advisory pertaining to their embedded version of Linux. This advisory contains vulnerabilities that may affect Avaya systems.

xslt.c in XML Security Library (aka xmlsec) before 1.2.17, as used in WebKit and other products, when XSLT is enabled, allows remote attackers to create or overwrite arbitrary files via vectors involving the libxslt output extension and a ds:Transform element during signature verification. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2011-1425 to this issue.

The server in ISC DHCP 3.x and 4.x before 4.2.2, 3.1-ESV before 3.1-ESV-R3, and 4.1-ESV before 4.1-ESV-R3 allows remote attackers to cause a denial of service (daemon exit) via a crafted DHCP packet. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2011-2748 to this issue.

The LZW decompressor in (1) the BufCompressedFill function in fontfile/decompress.c in X.Org libXfont before 1.4.4 and (2) compress/compress.c in 4.3BSD, as used in zopen.c in OpenBSD before 3.8, FreeBSD, NetBSD, FreeType 2.1.9, and other products, does not properly handle code words that are absent from the decompression table when encountered, which allows context-dependent attackers to trigger an infinite loop or a heap-based buffer overflow, and possibly execute arbitrary code, via a crafted compressed stream, a related issue to CVE-2006-1168 and CVE-2011-2896. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2011-2895 to this issue.

The (1) lc, (2) lcfirst, (3) uc, and (4) ucfirst functions in Perl 5.10.x, 5.11.x, and 5.12.x through 5.12.3, and 5.13.x through 5.13.11, do not apply the taint attribute to the return value upon processing tainted input, which might allow context-dependent attackers to bypass the taint protection mechanism via a crafted string. The Common Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name CVE-2011-1487 to this issue.

More information about these vulnerabilities can be found in the security advisories issued by Wind River (a login is required):

https://support.windriver.com/olsPortal/faces/basic/portal.jspx
WIND00269526
WIND00294088
WIND00299596
WIND00269520

2. Avaya System Products using Wind River Linux with affected components/packages installed:

Product: Affected Version(s): Risk Level: Actions:

Avaya 96x1 IP Deskphones 6.0.x thru 6.6.0 Low For SIP, upgrade to 7.0 or later.
For H.323 and B189, upgrade to 6.6.1 or later.

Product:	Affected Version(s):	Risk Level:	Actions:
Avaya 96x1 IP Deskphones	6.0.x thru 6.6.0	Low	For SIP, upgrade to 7.0 or later. For H.323 and B189, upgrade to 6.6.1 or later.

Recommended Actions for System Products:
Avaya strongly recommends that customers follow networking and security best practices by implementing firewalls, ACLs, physical security or other appropriate access restrictions. Though Avaya believes such restrictions should always be in place, risk to Avaya products and the surrounding network from this potential vulnerability may be mitigated by ensuring these practices are implemented until such time as an Avaya provided product update or the recommended Avaya action is applied. Further restrictions as deemed necessary based on the customer's security policies may be required during this interim period, but customers should not modify the System Product operating system or application unless the change is approved by Avaya. Making changes that are not approved may void the Avaya product service contract.

Mitigating Factors:

When determining risk, Avaya takes into account many factors as outlined by Avaya's Security Vulnerability Classification Policy. The following table describes factors that mitigate the risk of specific vulnerabilities for affected Avaya products:

Vulnerability	Mitigating Factors
CVE-2011-2748 CVE-2011-2895 CVE-2011-1487	These are rated low risk as no critical processes or applications are affected.
CVE-2011-1425	There is no risk as xmlsec package is not installed by default.

3. Additional Information:

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.

4. Disclaimer:

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.

5. Revision History:

V 1.0 - November 7, 2011 - Initial Statement issued.
V 2.0 - May 5, 2016 - Updated 96x1 Affected Versions and Actions and changed ASA status to Final.

Send information regarding any discovered security problems with Avaya products to either the contact noted in the product's documentation or [email protected].