CVE-2018-15453— Cisco Email Security Appliance Memory Corruption Denial of Service Vulnerability

Cisco Email Security Appliance Memory Corruption Denial of Service Vulnerability

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.

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输入验证不恰当

Cisco Email Security Appliance AsyncOS Software 缓冲区错误漏洞

Cisco Email Security Appliance（ESA）是美国思科（Cisco）公司的一个电子邮件安全设备。AsyncOS Software是运行在其中的一套操作系统。 Cisco ESA的AsyncOS Software中的Secure/Multipurpose Internet Mail Extensions (S/MIME) Decryption and Verification或S/MIME Public Key Harvesting功能存在缓冲区错误漏洞，该漏洞源于程序没有对S/M

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