Cisco released security advisories to address the vulnerabilities in Cisco IOS XE, NX-OS and FXOS software. An unauthenticated remote attacker could exploit the vulnerabilities by sending specially crafted requests or packets to an affected system. An authenticated attacker may exploit the vulnerabilities by executing malicious commands, manipulating remote management connections or sending crafted SNMP packets to an affected system.
For detailed information of the affected products, please refer to the section "Affected Products" of corresponding security advisory at vendor's website.
Successful exploitation of the vulnerabilities could lead to authentication bypass, arbitrary command execution, privilege escalation or denial of services of an affected system.
Software updates for affected systems are now available. System administrators of affected systems should follow the recommendations provided by the product vendor and take immediate actions to mitigate the risk. For detailed information of the available patches, please refer to the section "Fixed Software" of corresponding security advisory at vendor's website.
System administrators should contact their product support vendors for the fixes and assistance.
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-iosxe-rest-auth-bypass
https://tools.cisco.com/security/center/viewErp.x?alertId=ERP-72243
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-ucs-privescalation
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nxos-memleak-dos
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nxos-ipv6-dos
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nxos-fsip-dos
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-fxnxos-snmp-dos
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nxos-snmp-bypass
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nxos-ntp-dos
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nxos-api-dos
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nexus-aci-dos
https://www.hkcert.org/my_url/en/alert/19082901
https://www.us-cert.gov/ncas/current-activity/2019/08/29/cisco-releases-security-updates-multiple-products
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-1962 (to CVE-2019-1969)
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-1977
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-12643