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.
References
Link | Resource |
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http://www.securityfocus.com/bid/106511 | Third Party Advisory VDB Entry |
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-esa-dos | Vendor Advisory |
http://www.securityfocus.com/bid/106511 | Third Party Advisory VDB Entry |
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-esa-dos | Vendor Advisory |
Configurations
Configuration 1 (hide)
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History
21 Nov 2024, 03:50
Type | Values Removed | Values Added |
---|---|---|
References | () http://www.securityfocus.com/bid/106511 - Third Party Advisory, VDB Entry | |
References | () https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-esa-dos - Vendor Advisory |
Information
Published : 2019-01-10 18:29
Updated : 2024-11-21 03:50
NVD link : CVE-2018-15453
Mitre link : CVE-2018-15453
CVE.ORG link : CVE-2018-15453
JSON object : View
Products Affected
cisco
- email_security_appliance_firmware