ID

VAR-200810-0010

CVE

CVE-2008-4609

TITLE

TCP may keep its offered receive window closed indefinitely (RFC 1122)

DESCRIPTION

The TCP implementation in (1) Linux, (2) platforms based on BSD Unix, (3) Microsoft Windows, (4) Cisco products, and probably other operating systems allows remote attackers to cause a denial of service (connection queue exhaustion) via multiple vectors that manipulate information in the TCP state table, as demonstrated by sockstress. Part of the Transmission Control Protocol (TCP) specification (RFC 1122) allows a receiver to advertise a zero byte window, instructing the sender to maintain the connection but not send additional TCP payload data. The sender should then probe the receiver to check if the receiver is ready to accept data. Narrow interpretation of this part of the specification can create a denial-of-service vulnerability. By advertising a zero receive window and acknowledging probes, a malicious receiver can cause a sender to consume resources (TCP state, buffers, and application memory), preventing the targeted service or system from handling legitimate connections. Transmission Control Protocol (TCP) Multiple implementations of service disruption (DoS) Vulnerabilities exist. RFC793 It is prescribed by Transmission Control Protocol (TCP) Implementation of service disruption due to misuse of available resources after connection establishment (DoS) Vulnerabilities exist.Service operation disrupted by a remote third party (DoS) There is a possibility of being attacked. The core TCP/IP protocol is prone to multiple remote denial-of-service vulnerabilities. The issues are tracked by Cisco Bug IDs CSCsv04836, CSCsv07712, CSCsv66169, CSCsv02768, CSCsv08325, and CSCsv08579. These issues are reported to affect multiple vendors' implementations of the TCP/IP stack. ---------------------------------------------------------------------- Do you have VARM strategy implemented? (Vulnerability Assessment Remediation Management) If not, then implement it through the most reliable vulnerability intelligence source on the market. Implement it through Secunia. For more information visit: http://secunia.com/advisories/business_solutions/ Alternatively request a call from a Secunia representative today to discuss how we can help you with our capabilities contact us at: sales@secunia.com ---------------------------------------------------------------------- TITLE: Blue Coat ProxySG TCP Implementation Denial of Service Vulnerabilities SECUNIA ADVISORY ID: SA37044 VERIFY ADVISORY: http://secunia.com/advisories/37044/ DESCRIPTION: Some vulnerabilities have been reported in Blue Coat ProxySG, which can be exploited by malicious people to cause a DoS (Denial of Service). The vulnerabilities are caused due to errors in the TCP implementation when processing TCP packets. These can be exploited to exhaust system resources and render the appliance unresponsive to legitimate requests. SOLUTION: Please consult the vendor's advisory for potential workaround information. PROVIDED AND/OR DISCOVERED BY: The vendor credits Outpost24. ORIGINAL ADVISORY: https://kb.bluecoat.com/index?page=content&id=SA37 ---------------------------------------------------------------------- About: This Advisory was delivered by Secunia as a free service to help everybody keeping their systems up to date against the latest vulnerabilities. Subscribe: http://secunia.com/advisories/secunia_security_advisories/ Definitions: (Criticality, Where etc.) http://secunia.com/advisories/about_secunia_advisories/ Please Note: Secunia recommends that you verify all advisories you receive by clicking the link. Secunia NEVER sends attached files with advisories. Secunia does not advise people to install third party patches, only use those supplied by the vendor. ---------------------------------------------------------------------- Unsubscribe: Secunia Security Advisories http://secunia.com/sec_adv_unsubscribe/?email=packet%40packetstormsecurity.org ---------------------------------------------------------------------- . -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 SUPPORT COMMUNICATION - SECURITY BULLETIN Document ID: c01923093 Version: 1 HPSBMI02473 SSRT080138 rev.1 - Cisco Catalyst Blade Switch 3020/3120, Remote Denial of Service (DoS) NOTICE: The information in this Security Bulletin should be acted upon as soon as possible. Release Date: 2009-11-17 Last Updated: 2009-11-17 Potential Security Impact: Remote execution of arbitrary code, Denial of Service (DoS) Source: Hewlett-Packard Company, HP Software Security Response Team VULNERABILITY SUMMARY A potential vulnerability has been identified with the Cisco Catalyst Blade Switch 3020/3021. The vulnerability could be exploited remotely to create a Denial of Service (DoS). References: CVE-2008-4609, Cisco Security Advisory: TCP State Manipulation Denial of Service Vulnerabilities in Multiple Cisco Products(cisco-sa-20090908-tcp24) SUPPORTED SOFTWARE VERSIONS*: ONLY impacted versions are listed. Cisco Catalyst Blade Switch 3020 for c-Class BladeSystem running firmware earlier than v12.2(50) Cisco Catalyst Blade Switch 3120G and Cisco Catalyst Blade Switch 3120X for HP running firmware earlier than v12.2(50) BACKGROUND CVSS 2.0 Base Metrics =========================================================== Reference Base Vector Base Score CVE-2008-4609 (AV:N/AC:M/Au:N/C:N/I:N/A:C) 7.1 =========================================================== Information on CVSS is documented in HP Customer Notice: HPSN-2008-002 RESOLUTION HP has provided firmware updates to resolve this vulnerability. Product Firmware Version Cisco Catalyst Blade Switch 3020 for c-Class BladeSystem 12.2(50) SE1 or subsequent Cisco Catalyst Blade Switch 3120G and Cisco Catalyst Blade Switch 3120X for HP 12.2(50) SE1 or subsequent To Locate the Firmware Update Browse to http://www.hp.com and do the following: Select "Support & Drivers" In Step 1 select "Download drivers and software (and firmware)" In Step 2 enter "Cisco Catalyst Blade Switch" Click on "Go" Select the desired product Select the desired Windows operating system Click on "Firmware - Blade Infrastructure" PRODUCT SPECIFIC INFORMATION None HISTORY Version:1 (rev.1) - 17 November 2009 Initial release Third Party Security Patches: Third party security patches that are to be installed on systems running HP software products should be applied in accordance with the customer's patch management policy. Support: For further information, contact normal HP Services support channel. Report: To report a potential security vulnerability with any HP supported product, send Email to: security-alert@hp.com It is strongly recommended that security related information being communicated to HP be encrypted using PGP, especially exploit information. To get the security-alert PGP key, please send an e-mail message as follows: To: security-alert@hp.com Subject: get key Subscribe: To initiate a subscription to receive future HP Security Bulletins via Email: http://h30046.www3.hp.com/driverAlertProfile.php?regioncode=NA&langcode=USENG&jumpid=in_SC-GEN__driverITRC&topiccode=ITRC On the web page: ITRC security bulletins and patch sign-up Under Step1: your ITRC security bulletins and patches -check ALL categories for which alerts are required and continue. Under Step2: your ITRC operating systems -verify your operating system selections are checked and save. To update an existing subscription: http://h30046.www3.hp.com/subSignIn.php Log in on the web page: Subscriber's choice for Business: sign-in. On the web page: Subscriber's Choice: your profile summary - use Edit Profile to update appropriate sections. To review previously published Security Bulletins visit: http://www.itrc.hp.com/service/cki/secBullArchive.do * The Software Product Category that this Security Bulletin relates to is represented by the 5th and 6th characters of the Bulletin number in the title: GN = HP General SW MA = HP Management Agents MI = Misc. 3rd Party SW MP = HP MPE/iX NS = HP NonStop Servers OV = HP OpenVMS PI = HP Printing & Imaging ST = HP Storage SW TL = HP Trusted Linux TU = HP Tru64 UNIX UX = HP-UX VV = HP VirtualVault System management and security procedures must be reviewed frequently to maintain system integrity. HP is continually reviewing and enhancing the security features of software products to provide customers with current secure solutions. "HP is broadly distributing this Security Bulletin in order to bring to the attention of users of the affected HP products the important security information contained in this Bulletin. HP recommends that all users determine the applicability of this information to their individual situations and take appropriate action. HP does not warrant that this information is necessarily accurate or complete for all user situations and, consequently, HP will not be responsible for any damages resulting from user's use or disregard of the information provided in this Bulletin. To the extent permitted by law, HP disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose, title and non-infringement." Copyright 2009 Hewlett-Packard Development Company, L.P. Hewlett-Packard Company shall not be liable for technical or editorial errors or omissions contained herein. The information provided is provided "as is" without warranty of any kind. To the extent permitted by law, neither HP or its affiliates, subcontractors or suppliers will be liable for incidental,special or consequential damages including downtime cost; lost profits;damages relating to the procurement of substitute products or services; or damages for loss of data, or software restoration. The information in this document is subject to change without notice. Hewlett-Packard Company and the names of Hewlett-Packard products referenced herein are trademarks of Hewlett-Packard Company in the United States and other countries. Other product and company names mentioned herein may be trademarks of their respective owners. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iEYEARECAAYFAksEDAMACgkQ4B86/C0qfVm87gCgliWdpIKldzOKHRvJA5r9gR4Z ge0AoMu3ueCbIB4y3HUmT/jReUzE4jym =uBei -----END PGP SIGNATURE-----

AFFECTED PRODUCTS