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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.1811.2 Cisco Web Security Appliance 24 July 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Web Security Appliance Publisher: Cisco Systems Operating System: Cisco Impact/Access: Root Compromise -- Existing Account Cross-site Scripting -- Remote with User Interaction Access Confidential Data -- Remote/Unauthenticated Provide Misleading Information -- Remote with User Interaction Reduced Security -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2017-6751 CVE-2017-6750 CVE-2017-6749 CVE-2017-6748 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170719-wsa5 https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170719-wsa4 https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170719-wsa3 https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170719-wsa2 Comment: This bulletin contains four (4) Cisco Systems security advisories. Revision History: July 24 2017: cisco-sa-20170719-wsa1 duplicate removed. July 24 2017: Initial Release - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Security Advisory Cisco Web Security Appliance Administrative Interface Access Control Bypass Vulnerability Medium Advisory ID: cisco-sa-20170719-wsa5 First Published: 2017 July 19 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvd88863 CVSS Score: Base 5.3, Temporal 5.3 Base 5.3, Temporal 5.3 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:X/RL:X/RC:X CVE-2017-6751 CWE-20 Summary A vulnerability in the web proxy functionality of the Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to forward traffic from the web proxy interface of an affected device to the administrative management interface of an affected device. The vulnerability exists because the affected software fails to deny traffic that is forwarded from the web proxy interface to the administrative management interface of a device. An attacker could exploit this vulnerability by sending a crafted stream of HTTP or HTTPS traffic to the web proxy interface of an affected device. A successful exploit could allow traffic to reach the administrative management interface of the affected device although the traffic should have been dropped. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170719-wsa5 Affected Products Vulnerable Products This vulnerability affects both the virtual and hardware versions of Cisco Web Security Appliance (WSA). For information about affected software releases, consult the Cisco bug ID(s) at the top of this advisory. Products Confirmed Not Vulnerable No other Cisco products are currently known to be affected by this vulnerability. Cisco has confirmed that this vulnerability does not affect the following products: Cisco Email Security Appliance (ESA), virtual or hardware versions Cisco Content Security Management Appliance (SMA), virtual or hardware versions Workarounds There are no workarounds that address this vulnerability. Fixed Software For information about fixed software releases, consult the Cisco bug ID(s) at the top 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 and Alerts 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 The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. Source This vulnerability was found by Daniel Jensen of Security-Assessment.com. URL https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170719-wsa5 Revision History Version Description Section Status Date 1.0 Initial public release. -- Final 2017-July-19 LEGAL DISCLAIMER THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME. A standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products. === Cisco Web Security Appliance Static Credentials Vulnerability Medium Advisory ID: cisco-sa-20170719-wsa4 First Published: 2017 July 19 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCve06124 CVSS Score: Base 5.3, Temporal 5.3 Base 5.3, Temporal 5.3 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:X/RL:X/RC:X CVE-2017-6750 CWE-255 Summary A vulnerability in AsyncOS for the Cisco Web Security Appliance (WSA) could allow an unauthenticated, local attacker to log in to the device with the privileges of a limited user or an unauthenticated, remote attacker to authenticate to certain areas of the web GUI. The vulnerability is due to a user account that has a default and static password. An attacker could exploit this vulnerability by connecting to the affected system using this default account. An exploit could allow the attacker to log in with the default credentials, allowing the attacker to view the system's serial number by using the CLI or to download reports by using the web interface. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170719-wsa4 Affected Products Vulnerable Products This vulnerability affects virtual and hardware versions of Cisco Web Security Appliance (WSA). For information about affected software releases, consult the Cisco bug ID(s) at the top of this advisory. Products Confirmed Not Vulnerable No other Cisco products are currently known to be affected by this vulnerability. Cisco has confirmed that this vulnerability does not affect the following products: Cisco Email Security Appliance (ESA), virtual or hardware versions Cisco Content Security Management Appliance (SMA), virtual or hardware versions Workarounds There are no workarounds that address this vulnerability. Fixed Software For information about fixed software releases, consult the Cisco bug ID(s) at the top 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 and Alerts 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 The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. Source This vulnerability was found by Daniel Jensen of Security-Assessment.com. URL https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170719-wsa4 Revision History Version Description Section Status Date 1.0 Initial public release. -- Final 2017-July-19 LEGAL DISCLAIMER THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME. A standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products. === Cisco Web Security Appliance Stored Cross-Site Scripting Vulnerability Medium Advisory ID: cisco-sa-20170719-wsa3 First Published: 2017 July 19 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvd88865 CVSS Score: Base 6.4, Temporal 6.4 Base 6.4, Temporal 6.4 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N/E:X/RL:X/RC:X CVE-2017-6749 CWE-79 Summary A vulnerability in the web-based management interface of Cisco Web Security Appliance (WSA) could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against a user of the web-based management interface of an affected device. The vulnerability is due to insufficient validation of user-supplied input by the web-based management interface of an affected device. An attacker could exploit this vulnerability by persuading a user of the interface to click a crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the interface or allow the attacker to access sensitive browser-based information. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170719-wsa3 Affected Products Vulnerable Products This vulnerability affects virtual and hardware versions of Cisco Web Security Appliance (WSA). For information about affected software releases, consult the Cisco bug ID(s) at the top of this advisory. Products Confirmed Not Vulnerable No other Cisco products are currently known to be affected by this vulnerability. Cisco has confirmed that this vulnerability does not affect the following products: Cisco Email Security Appliance (ESA), virtual or hardware versions Cisco Content Security Management Appliance (SMA), virtual or hardware versions Workarounds There are no workarounds that address this vulnerability. Fixed Software For information about fixed software releases, consult the Cisco bug ID(s) at the top 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 and Alerts 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 The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. Source This vulnerability was found by Daniel Jensen of Security-Assessment.com. URL https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170719-wsa3 Revision History Version Description Section Status Date 1.0 Initial public release. -- Final 2017-July-19 LEGAL DISCLAIMER THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME. A standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products. === Cisco Web Security Appliance Authenticated Command Injection and Privilege Escalation Vulnerability Medium Advisory ID: cisco-sa-20170719-wsa2 First Published: 2017 July 19 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvd88855 CVSS Score: Base 6.7, Temporal 6.7 Base 6.7, Temporal 6.7 CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X CVE-2017-6748 CWE-264 Summary A vulnerability in the CLI parser of the Cisco Web Security Appliance (WSA) could allow an authenticated, local attacker to perform command injection and elevate privileges to root. The attacker must authenticate with valid operator-level or administrator-level credentials. The vulnerability is due to insufficient validation of user-supplied input in the CLI parser. An attacker could exploit this vulnerability by authenticating to the affected device and performing command injection over the CLI. An exploit could allow the attacker to escape from the CLI subshell and execute system-level commands on the underlying operating system as root. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170719-wsa2 Affected Products Vulnerable Products This vulnerability affects virtual and hardware versions of Cisco Web Security Appliance (WSA). For information about affected software releases, consult the Cisco bug ID(s) at the top of this advisory. Products Confirmed Not Vulnerable No other Cisco products are currently known to be affected by this vulnerability. Cisco has confirmed that this vulnerability does not affect virtual or hardware versions of Cisco Email Security Appliance (ESA). Workarounds There are no workarounds that address this vulnerability. Fixed Software For information about fixed software releases, consult the Cisco bug ID(s) at the top 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 and Alerts 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 The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. Source This vulnerability was found by Daniel Jensen of Security-Assessment.com. URL https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170719-wsa2 Revision History Version Description Section Status Date 1.0 Initial public release. -- Final 2017-July-19 LEGAL DISCLAIMER THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME. A standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products.Cisco Web Security Appliance Authenticated Command Injection and Privilege Escalation Vulnerability Medium Advisory ID: cisco-sa-20170719-wsa2 First Published: 2017 July 19 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvd88855 CVSS Score: Base 6.7, Temporal 6.7 Base 6.7, Temporal 6.7 CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X CVE-2017-6748 CWE-264 Summary A vulnerability in the CLI parser of the Cisco Web Security Appliance (WSA) could allow an authenticated, local attacker to perform command injection and elevate privileges to root. The attacker must authenticate with valid operator-level or administrator-level credentials. The vulnerability is due to insufficient validation of user-supplied input in the CLI parser. An attacker could exploit this vulnerability by authenticating to the affected device and performing command injection over the CLI. An exploit could allow the attacker to escape from the CLI subshell and execute system-level commands on the underlying operating system as root. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170719-wsa2 Affected Products Vulnerable Products This vulnerability affects virtual and hardware versions of Cisco Web Security Appliance (WSA). For information about affected software releases, consult the Cisco bug ID(s) at the top of this advisory. Products Confirmed Not Vulnerable No other Cisco products are currently known to be affected by this vulnerability. Cisco has confirmed that this vulnerability does not affect virtual or hardware versions of Cisco Email Security Appliance (ESA). Workarounds There are no workarounds that address this vulnerability. Fixed Software For information about fixed software releases, consult the Cisco bug ID(s) at the top 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 and Alerts 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 The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. Source This vulnerability was found by Daniel Jensen of Security-Assessment.com. URL https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170719-wsa2 Revision History Version Description Section Status Date 1.0 Initial public release. -- Final 2017-July-19 LEGAL DISCLAIMER THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME. A standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products. - --------------------------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. 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Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== 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 iQIVAwUBWXV6LYx+lLeg9Ub1AQgBsg//f2N36h/TW3AWkXHvq4lc2lYouW2XRch9 C92H4hTPLnWrD5EX9hmKHlTXeotxom86237z2MaQi2ZD5SAkzakhUIuc6rzs5xmN RP/rHWy9ElFjl1RaLki06WUEeCRplTILzp7wNY6IzqBzsCZ8iHM+gZE5f+6j3upS +VQVez0LzxhLlTSfl9LqvkaABzI7xJAVWLjNydQo+O8diAPTM5pFTXQvGpf98KQC qUtFSMTEGjtgLIHSabmAQqPVQo/FMfMKN18fhH8bC+drU0jii5h6XYxWyWo2faJp J4QhYBN/JXKuD1NzhmzX4qa1roaIaB7Apkq684DS6Ct5kWCj1QBceM7m4C1CPcYK D3A6hPM0Sh8F50hr/8SdVRcEvgmhkTmGvCdjVisTltkNBo4OD7I0WpgzZ/oYNtO9 gOFKbOZXOYm6UYrdVxNCbDnZpRQwF0PNxHFsZMc8la85at117RUViN1pD+XfKWav SM0XF1/AH3BSPaWKd2pexPGN/tpMHuEYZmETi+sguUMRA5s/1wdKBWZlU4+kRp7b r3eFnOz3DtHdAAdM9t+DKYu8sIc095gslZ2INDuIovt5ZBv0re6eTv6N8jIIMlqK DO4ZfmcF4Ekb/sc5CmGaA8qxiZfd/mRu5jL6M+9gv2IjOp9TjpZUKVkY5xOaqpaQ afrVpiWMhHg= =bkW0 -----END PGP SIGNATURE-----