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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2015.2768 Multiple vulnerabilities identified in Cisco Web Security Appliance 5 November 2015 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Web Security Appliance Publisher: Cisco Systems Operating System: Cisco Impact/Access: Root Compromise -- Existing Account Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2015-6298 CVE-2015-6293 CVE-2015-6292 Original Bulletin: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151104-wsa2 http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151104-wsa http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151104-wsa1 Comment: This bulletin contains three (3) Cisco Systems security advisories. - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Cisco Web Security Appliance Range Request Denial of Service Vulnerability Advisory ID: cisco-sa-20151104-wsa2 Revision 1.0 For Public Release 2015 November 4 16:00 UTC (GMT) +--------------------------------------------------------------------- Summary ======= A vulnerability in the file-range request functionality of Cisco AsyncOS for Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an appliance because the appliance runs out of system memory. The vulnerability is due to a failure to free memory when a file range is requested through the Cisco WSA. An attacker could exploit this vulnerability by opening multiple connections that request file ranges through the WSA. A successful exploit could allow the attacker to cause the WSA to stop passing traffic when enough memory is used and not freed. Cisco has released software updates that address this vulnerability. A workaround that mitigates this vulnerability is also available. This advisory is available at the following link: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151104-wsa2 - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (SunOS) iQIVAwUBVjU+hopI1I6i1Mx3AQJRcg/+NIdwN6LOVr8XeSlK2mFK1ixg1ZbsyKeO TCmiSNBpsGf0wHxPWY9qewUHMSkhxZaVvu7szc24EcA5bWbjuexc0scxRFLuU7Nm LyDjmwRmKr/HVUvXg4wYnWT8y3VtijqVSTZSBnjskZGh4LO/095hZblYEas55Jzk QfHuTH554H7IB6zYOoZdbEOCC0CNzl9AyGAuJAmrZ/udlaQs18nurJR9OSayAltM 7sTxH6SIqFyEy2/+8yqpvUEqMNocYqrEasLjbxR0o73vdlJ9wcOKtyPUpcEioRN3 7BqnYiqPurnBZt+CkBbu5ehgq+0wYdFyJfWyrzeNE9LRMD0SyJTrAu68Pvd0e6AS 0TlpCbiSdOrtLm7vl6v+pF6R3sg+Ve7I2v4w7GXjlZapdRN+vEJoObOk2KGot9kV j3BKVy2RFwLgM+HJEvOCYNobQorb7+E72BkkBauBli8BE6pXI6mjvAxpADrYvv5r fxL2enMX0MNtdUKxgV/t8QvAFiFxMf8bV3kfuqRUul+V/MPQF3nbubtebMQruDT+ 3HhyoxwE1xV9HjEWOgrxpEwW/p4nxalF7RTbywbxllaHsMH8hhJYlyFmKL7jkRL8 VS8Oj6PX0P4MJX5TpCsMk8k0pjLYpnGsH+Jbl+CgkLA59DPeerBDhoBH45FbsCMn 80LINw5zqH8= =TsjI - -----END PGP SIGNATURE----- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Cisco Security Advisory: Cisco Web Security Appliance Certificate Generation Command Injection Vulnerability Advisory ID: cisco-sa-20151104-wsa Revision 1.0 For Public Release 2015 November 4 16:00 UTC (GMT) +--------------------------------------------------------------------- Summary ======= A vulnerability in the certificate generation process in the admin web interface of the Cisco Web Security Appliance (WSA) could allow an authenticated, remote attacker to execute arbitrary commands on an affected system with root-level privileges. The vulnerability is due to the improper validation of parameters passed to the affected system scripts. An attacker could exploit this vulnerability by passing arbitrary commands as arguments to the affected fields of the web interface. An exploit could allow the attacker to run arbitrary commands on the underlying system with root-level privileges. Cisco has released software updates that address this vulnerability. Workarounds that mitigate this vulnerability are not available. This advisory is available at the following link: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151104-wsa - -----BEGIN PGP SIGNATURE----- Comment: GPGTools - https://gpgtools.org iQIcBAEBCgAGBQJWOibcAAoJEIpI1I6i1Mx3ANEQAJ+ba8TyxsQ3Krkk3LQG5cEv HcM6gkBD5ZIN/mN114oCxEj09ja8I1uVQeEZ48QpJwsd2lK+6kShhk9dEf1pU+AF O6jQSB5K70pBu0OQiR+cjx6UL4n8rjXFg43A+x96LVf3urnsE2yLO6rwelo5RedZ /9buyqZ0tSlNlShjswtJGWDJb7fXnY8wKYdwdKrc3b/tcmpU9Ae/kCrH5p5lhmE5 QuS2lBDkp5kKR06TWO0dKjoSYXspS/HU8y/ol6Pebb6UdogYeMZCLC5JsbSKzQ3i mwBjLjt6ZA31Q+ML3FTkyv2KgNfFMi3t7tYCu+QPuFKJ2zd29Cbh7FLP+BdYg18P u3g5AdEZWLjBa1Crlo3NhTvH2qS4ZJ8wTMlLg3gk0W0eUnP/PRYFIOmUyP2gv4aU nrigoC/I67jZMnpLcZ1NPHAePdOPzK3YWxbAmCG/2tW2kJfRGAXnRPK/BqhhagVv 2RirzYFK5aYo7nVzXHiSqThtHuSpDnJZeYsVJwRYgHnhCsTwQYxCrLtEU/kF/btg F95Rm2Se3s+R39LK8G8msT4uJq8B1CCe+rnldgV8DR4S+49mZoI59uw240VIed+W JwLwmSPR0njrI+e+DboUaOOyrwrCjzYPe4EVMpTLmkVK6JgEXno/8q0zmwjnHRKv 0MgACGiN3EjEK/Mnq/aH =zUS3 - -----END PGP SIGNATURE----- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Cisco Web Security Appliance Cache Reply Denial of Service Vulnerability Advisory ID: cisco-sa-20151104-wsa1 Revision 1.0 For Public Release 2015 November 4 16:00 UTC (GMT) +--------------------------------------------------------------------- Summary ======= A vulnerability in the proxy cache functionality of Cisco AsyncOS for Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition because the device runs out of system memory. The vulnerability is due to improper memory operations by the affected software. The software fails to free a memory object when it retrieves data from the proxy server cache to terminate a TCP connection. An attacker could exploit this vulnerability by opening many proxy connections through the WSA. An exploit could allow the attacker to cause the WSA to stop passing traffic when enough memory is leaked. Cisco has released software updates that address this vulnerability. A workaround that mitigates this vulnerability is also available. This advisory is available at the following link: http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151104-wsa1 - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (SunOS) iQIVAwUBVjU+cYpI1I6i1Mx3AQI+ww//RagxLWcIsbnUqMk4yZ0BZmSMjcpNqgUp CLz5cIhCX3P4/6kK0mc1ad3o6LtqFeMCc0cooj6p83+CfeatAfdg8A65HrJ8Pp8S 5JimnhoAtMkAQUrUJJ0ch/mB4TMMhAGHSNnfBoleDhzn2Cc6uvk9MMNds5ERwU0z HHRq+kpVSzawf9LJpWpauf1RulXxH5KgsuQ7eeSqCdRGPGrH5Eg3FyA4O0DrACf4 FlgTvjz2qcXiwneQtOZ/eTD7N18YNgh3c/IqIwjWTDTJCUmEXRNfgDjZFP0aDv9f 6qhDJh2D18Fdh+EA+Y0iVUXP6r7HJrASM2qAqqJPSoawheyCZx48+gi5+QB/p7Ds M2MR6EgblF8DQcZHByMF7k8HCCMZEZu8PIqOwLQfI4v40qTTsKP4g4+IngdaGZ7h dFkM+93cpk+GbZIc7ATaePxnzA9l6T77eSYnfxIxHPHSZShU43W4W+mubyZyjeEz dwUPWv9Dm9uvZjH375aBmVFzxcdttXPSHq7iatpguEeojUGOl2kFRU4FYdPLx54b B4AMxlkwq73vhCEgoHjQ+pLMo3ep9tMjegfs0TlRwCi3lh8fBCzUojdMSJaQS8+V 8ipBwfieLRKHIDH8cV6y1FFKMmKc5tvb5yvXJnbXO+kltDhC9SpjKtqFkY7P7gV4 EpOZS1OWeE8= =jTdT - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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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: 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). 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