Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.2109.8 Multiple Vulnerabilities in Treck IP Stack Affecting Cisco Products: June 2020 24 August 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco GGSN Gateway GPRS Support Node Cisco MME Mobility Management Entity Cisco PGW Packet Data Network Gateway Cisco System Architecture Evolution Gateway (SAEGW) Cisco ASR 5000 Series Routers Cisco Home Node-B Gateway Cisco IP Services Gateway (IPSG) Cisco PDSN/HA Packet Data Serving Node and Home Agent Publisher: Cisco Systems Operating System: Cisco Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Access Confidential Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2020-11914 CVE-2020-11913 CVE-2020-11912 CVE-2020-11911 CVE-2020-11910 CVE-2020-11909 CVE-2020-11908 CVE-2020-11907 CVE-2020-11906 CVE-2020-11905 CVE-2020-11904 CVE-2020-11903 CVE-2020-11902 CVE-2020-11901 CVE-2020-11900 CVE-2020-11899 CVE-2020-11898 CVE-2020-11897 CVE-2020-11896 Reference: ESB-2020.2090 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-treck-ip-stack-JyBQ5GyC Revision History: August 24 2020: Vendor updated fixed release availability information and added additional rule links July 31 2020: Vendor updated fixed release availability information July 27 2020: Vendor published more information on affected StarOS versions July 23 2020: Vendor updated fixed release availability information and clarified exposure to vulnerabilities may be dependent on configuration July 20 2020: Vendor added info for fix availability, and references to CERT/CC's mitigations July 13 2020: Fixed release information for vulnerable products and links to Snort rules added. July 8 2020: Affected products and vulnerable products sections updated by vendor June 18 2020: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Multiple Vulnerabilities in Treck IP Stack Affecting Cisco Products: June 2020 Priority: Critical Advisory ID: cisco-sa-treck-ip-stack-JyBQ5GyC First Published: 2020 June 17 20:00 GMT Last Updated: 2020 August 21 16:40 GMT Version 1.8: Interim Workarounds: No workarounds availableCisco Bug IDs: CSCvu68945 CVE-2020-11896 CVE-2020-11897 CVE-2020-11898 CVE-2020-11899 CVE-2020-11900 CVE-2020-11901 CVE-2020-11902 CVE-2020-11903 CVE-2020-11904 CVE-2020-11905 CVE-2020-11906 CVE-2020-11907 CVE-2020-11908 CVE-2020-11909 CVE-2020-11910 CVE-2020-11911 CVE-2020-11912 CVE-2020-11913 CVE-2020-11914 CWE-20 Summary o A set of previously unknown vulnerabilities on the Treck IP stack implementation were disclosed on June 16, 2020. The vulnerabilities are collectively known as Ripple20. Exploitation of these vulnerabilities could result in remote code execution, denial of service (DoS), or information disclosure, depending on the specific vulnerability. This advisory will be updated as additional information becomes available. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-treck-ip-stack-JyBQ5GyC Affected Products o Cisco investigated its product line to determine which products may be affected by these vulnerabilities. The Vulnerable Products section of this advisory includes Cisco bug IDs for each affected product. The bugs are accessible through the Cisco Bug Search Tool and contain additional platform-specific information, including workarounds (if available) and fixed software releases. Any product or service not listed in the Vulnerable Products section of this advisory is to be considered not vulnerable. Vulnerable Products The following table lists Cisco products that are affected by the vulnerabilities that are described in this advisory. If a future release date is indicated for software, the date provided represents an estimate based on all information known to Cisco as of the Last Updated date at the top of the advisory. Availability dates are subject to change based on a number of factors, including satisfactory testing results and delivery of other priority features and fixes. If no version or date is listed for an affected component (indicated by a blank field and/or an advisory designation of Interim), Cisco is continuing to evaluate the fix and will update the advisory as additional information becomes available. After the advisory is marked Final, customers should refer to the associated Cisco bug(s) for further details. Unless otherwise documented, all software releases prior to the first fixed release are to be considered affected by these vulnerabilities. Product Cisco Bug ID Fixed Release Availability Routing and Switching - Enterprise and Service Provider Cisco ASR 5000 CSCvu68945 21.5.27 (30 Jul 2020) 21.5.27 (30 Jul 2020) 21.8.x (14 Sep 2020) 21.9.x (8 Sep 2020) 21.10.x (2 Sep 2020) 21.11.15 (29 Jul 2020) 21.12.x (4 Sep 2020) Cisco ASR 5500 CSCvu68945 21.13.x (31 Aug 2020) 21.14.22 (30 Jul 2020) 21.15.45 (22 Jul 2020) 21.16.x (25 Aug 2020) 21.17.10 (20 Aug 2020) 21.18.8 (24 Aug 2020) 21.19.5 (19 Aug 2020) 21.20.2 (24 Jul 2020) 21.5.27 (30 Jul 2020) 21.8.x (14 Sep 2020) 21.9.x (8 Sep 2020) 21.10.x (2 Sep 2020) 21.11.15 (29 Jul 2020) 21.12.x (4 Sep 2020) Cisco Virtual Packet Core CSCvu68945 21.13.x (31 Aug 2020) 21.14.22 (30 Jul 2020) 21.15.45 (22 Jul 2020) 21.16.x (25 Aug 2020) 21.17.10 (20 Aug 2020) 21.18.8 (24 Aug 2020) 21.19.5 (19 Aug 2020) 21.20.2 (24 Jul 2020) Note: Exposure to the vulnerabilities may be configuration dependent. See the Cisco bug(s) for the most complete product-specific information. Cisco StarOS Software In the following table, the left column lists the Cisco StarOS Software features that are vulnerable. The right column indicates the basic configuration for the feature from the show running-config CLI command. If a device is configured for one of these features, it is vulnerable. Cisco StarOS Software Feature Vulnerable Configuration URL-based Re-addressing flow action url-readdress server [...] SIP ALG NAT Inspection firewall nat-alg sip [...] H323 ALG NAT Inspection firewall nat-alg h323 [...] Inline TCP Optimization (CUSP) tcp-acceleration [...] If a Cisco StarOS Software deployment uses a vulnerable configuration, as described above, it may be affected by the following vulnerabilities: CVE-2020-11896: Malformed IPv4 Tunneled Packets Processing Remote Code Execution Vulnerability CVE-2020-11898: Malformed IPv4 Packets Processing Out-of-Bounds Read Vulnerability CVE-2020-11899: Improper Input Validation in IPv6 Out-of-Bounds Read Vulnerability CVE-2020-11900: IPv4 Tunneling Component Double-Free Vulnerability CVE-2020-11907: Improper Packet Length Checks Integer Underflow Vulnerability CVE-2020-11909: Improper Input Validation in IPv4 Component CVE-2020-11912: Improper Input Validation in TCP Component CVE-2020-11913: Improper Input Validation in IPv6 Component Cisco has confirmed that Cisco StarOS Software is not affected by the following vulnerabilities: CVE-2020-11897: Malformed IPv6 Packets Processing Out-of-Bounds Read and Write Vulnerability CVE-2020-11901: DNS Response Processing Remote Code Execution Vulnerability CVE-2020-11902: Out-of-Bounds Read When Processing IPv6 over IPv4 Packets CVE-2020-11903: Out-of-Bounds Read Processing DHCP Response CVE-2020-11904: Integer Overflow in Memory Allocation CVE-2020-11905: DHCPv6 Out-of-Bounds Read Vulnerability CVE-2020-11906: Ethernet Link Layer Component Integer Underflow Vulnerability CVE-2020-11908: Improper Null Termination in DHCP Component CVE-2020-11910: Improper Input Validation in ICMPv4 Component CVE-2020-11911: Improper Access Control in ICMPv4 Component CVE-2020-11914: Improper Input Validation in ARP Component Products Confirmed Not Vulnerable Only products and services listed in the Vulnerable Products section of this advisory are known to be affected by these vulnerabilities. Workarounds o There are no workarounds that address these vulnerabilities. A set of network based mitigations has been documented by the CERT Coordination Center and is available at the following address: https://github.com/CERTCC/PoC-Exploits/blob/master/vu-257161/ recommendations.md Fixed Software o For information about fixed software releases, consult the Cisco bugs identified in the Vulnerable Products section of this advisory. When considering software upgrades , customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories page , to determine exposure and a complete upgrade solution. In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers. Exploitation and Public Announcements o The Cisco Product Security Incident Response Team (PSIRT) is not aware of any malicious use of the vulnerabilities that are described in this advisory. Source o These vulnerabilities were discovered and reported to CERT/CC by JSOF. Cisco Security Vulnerability Policy o To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy . This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco. Action Links for This Advisory o Snort Rule 54383 Snort Rule 116:293 Snort Rule 116:431:2 Snort Rule 116:296:2 Snort Rule 116:461:3 Snort Rule 54705 Snort Rule 54706 URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-treck-ip-stack-JyBQ5GyC Revision History o +---------+------------------------+--------------+---------+-------------+ | Version | Description | Section | Status | Date | +---------+------------------------+--------------+---------+-------------+ | | Updated fixed release | | | | | | availability | Vulnerable | | | | 1.8 | information. Added | Products | Interim | 2020-AUG-21 | | | links to additional | | | | | | Snort rules. | | | | +---------+------------------------+--------------+---------+-------------+ | | Updated fixed release | Vulnerable | | | | 1.7 | availability | Products | Interim | 2020-JUL-29 | | | information. | | | | +---------+------------------------+--------------+---------+-------------+ | | Updated fixed release | | | | | | availability | | | | | | information. | | | | | 1.6 | Documented vulnerable | Vulnerable | Interim | 2020-JUL-24 | | | StarOS configurations. | Products | | | | | Specified which | | | | | | vulnerabilities affect | | | | | | StarOS. | | | | +---------+------------------------+--------------+---------+-------------+ | | Updated fixed release | | | | | | availability | | | | | | information. Clarified | Vulnerable | | | | 1.5 | that exposure to the | Products | Interim | 2020-JUL-22 | | | vulnerabilities may be | | | | | | configuration | | | | | | dependent. | | | | +---------+------------------------+--------------+---------+-------------+ | | Updated the vulnerable | | | | | | products with fix | | | | | | availability | Vulnerable | | | | 1.4 | information. Added a | Products, | Interim | 2020-JUL-17 | | | reference to | Workarounds. | | | | | mitigations documented | | | | | | by CERT/CC. | | | | +---------+------------------------+--------------+---------+-------------+ | | Added the fixed | | | | | | release availability | | | | | 1.3 | information for | Vulnerable | Interim | 2020-JUL-10 | | | vulnerable products. | Products | | | | | Added links to Snort | | | | | | rules. | | | | +---------+------------------------+--------------+---------+-------------+ | | Updated the list of | | | | | | vulnerable products: | | | | | | changed the product | | | | | | naming to refer to the | Affected | | | | | affected platform | Products, | | | | 1.2 | rather than to the | Vulnerable | Interim | 2020-JUL-07 | | | function (for example, | Products | | | | | GGSN, IPSG) for | | | | | | StarOS-based products. | | | | | | No products remain | | | | | | under investigation. | | | | +---------+------------------------+--------------+---------+-------------+ | | Updated the lists of | Affected | | | | 1.1 | products under | Products, | Interim | 2020-JUN-22 | | | investigation and | Vulnerable | | | | | vulnerable products. | Products | | | +---------+------------------------+--------------+---------+-------------+ | 1.0 | Initial public | - | Interim | 2020-JUN-17 | | | release. | | | | +---------+------------------------+--------------+---------+-------------+ - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBX0NCxeNLKJtyKPYoAQjuow/+OT8dn3JxhGnL4gkc9n4RikXSFoO3aqfr vetjCoOAxdGmAtDMx7sOi3UhLe6G/pbKbvMf6bKicRZVHqZBoYLIwq9RsCKNL9OG zizJdl69umqJ35yaOvKquzbcCqjwcxQ8Nv8R0gjLII+HIBCNcggw+MvL8p+TvfW3 61KEh4YQFzxWKXyrnOXL9Bst5uOAldP0seBU9qlkky3RQVCSCfwsOvGj4C5GQRsP XXj+0xyGtqJsyBRUN3fjgIMXv8teNAf3AjKsFNKywAUK1C0IY3NugNsOfxKQB8sg ATK+qajPibf6ioyskebVagE7DCfD8QLPJzOcxjKtakxmUKEIYjLUm/IsM54+nB08 YleBE3t2jw6yvqFKuZHKbkl5opxicnAxEAopQ9M8RbwbmiYjMW6ncK1CaBeACbgJ mxj4SqVbiSD7D0U/47JKfjlcP08HiuyhH/RNkt1zOIxDe+KTSctPfAD5Mxh+TsTR rlkxG7QMso+oNN1H6UtfrUm4SfF9gBe5418lsmkc1RFG8I6UHzsackMvNF8+qESb sFvxlLFve9soileUWUrVS25c7qFDxbZReevBHVf6HR0dup59NxrHZvxFr9Xp2gO1 O8BQPYBYyCtQZ53LCzXvQC4iK8yCP3If7AJpfJCnopC4AitGGWRtpm8pagjyLrpG IO748YOVo90= =zhUw -----END PGP SIGNATURE-----