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Vulnerability Details : CVE-2018-15453

A vulnerability in the Secure/Multipurpose Internet Mail Extensions (S/MIME) Decryption and Verification or S/MIME Public Key Harvesting features of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to cause an affected device to corrupt system memory. A successful exploit could cause the filtering process to unexpectedly reload, resulting in a denial of service (DoS) condition on the device. The vulnerability is due to improper input validation of S/MIME-signed emails. An attacker could exploit this vulnerability by sending a malicious S/MIME-signed email through a targeted device. If Decryption and Verification or Public Key Harvesting is configured, the filtering process could crash due to memory corruption and restart, resulting in a DoS condition. The software could then resume processing the same S/MIME-signed email, causing the filtering process to crash and restart again. A successful exploit could allow the attacker to cause a permanent DoS condition. This vulnerability may require manual intervention to recover the ESA.
Publish Date : 2019-01-10 Last Update Date : 2019-10-09
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- CVSS Scores & Vulnerability Types

CVSS Score
7.8
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of ServiceOverflowMemory corruption
CWE ID 119

- Products Affected By CVE-2018-15453

# Product Type Vendor Product Version Update Edition Language
1 OS Cisco Email Security Appliance Firmware 11.0.1-401 Version Details Vulnerabilities
2 OS Cisco Email Security Appliance Firmware 11.1.0-131 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Cisco Email Security Appliance Firmware 2

- References For CVE-2018-15453

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-esa-dos
CISCO 20190109 Cisco Email Security Appliance Memory Corruption Denial of Service Vulnerability
http://www.securityfocus.com/bid/106511
BID 106511 Cisco AsyncOS for Email Security Appliance CVE-2018-15453 Remote Denial of Service Vulnerability Release Date:2019-01-09

- Metasploit Modules Related To CVE-2018-15453

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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