cisco-sa-esa-dos-gdghHmbV: Cisco Email Security Appliance Denial of Service Vulnerability
A vulnerability in Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper handling of certain TLS connections that are processed by an affected device. An attacker could exploit this vulnerability by establishing a large number of concurrent TLS connections to an affected device. A successful exploit could allow the attacker to cause the device to drop new TLS email messages that come from the associated email servers. Exploitation of this vulnerability does not cause the affected device to unexpectedly reload. The device will recover autonomously within a few hours of when the attack is halted or mitigated. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-dos-gdghHmbV
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Affected Software
Event History
Frequently Asked Questions
What is the severity of cisco-sa-esa-dos-gdghHmbV?
The severity of cisco-sa-esa-dos-gdghHmbV is classified as a denial of service vulnerability.
How do I fix cisco-sa-esa-dos-gdghHmbV?
To fix cisco-sa-esa-dos-gdghHmbV, update your Cisco AsyncOS Software on affected email security appliances to a patched version.
Who is affected by cisco-sa-esa-dos-gdghHmbV?
Organizations using affected versions of Cisco AsyncOS Software for Email Security Appliance are vulnerable to cisco-sa-esa-dos-gdghHmbV.
What causes cisco-sa-esa-dos-gdghHmbV?
cisco-sa-esa-dos-gdghHmbV is caused by improper handling of certain TLS connections in the Cisco AsyncOS Software.
Can cisco-sa-esa-dos-gdghHmbV be exploited remotely?
Yes, cisco-sa-esa-dos-gdghHmbV can be exploited by an unauthenticated remote attacker.