Vulnerability identifier: #VU46248
Vulnerability risk: Medium
CVSSv3.1: 4.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:U/RC:C]
CVE-ID:
CWE-ID:
CWE-407
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Cisco AsyncOS for Cisco Email Security Appliance
Server applications /
IDS/IPS systems, Firewalls and proxy servers
Vendor: Cisco Systems, Inc
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to inefficient processing of incoming Transport Layer Security (TLS) traffic. A remote attacker can send specially crafted TLS packets, trigger a prolonged state of high CPU utilization and perform a denial of service (DoS) attack.
Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versions
Cisco AsyncOS for Cisco Email Security Appliance: 13.5.1 277
External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-tls-dos-xW53TBhb
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.