| ID |
CVE-2018-15453
|
| Summary |
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 |
|
| Vulnerable Configurations |
|
| CVSS |
| Base: | 7.8 (as of 16-09-2020 - 14:13) |
| Impact: | |
| Exploitability: | |
|
| CWE |
CWE-787 |
| CAPEC |
|
| Access |
| Vector | Complexity | Authentication |
| NETWORK |
LOW |
NONE |
|
| Impact |
| Confidentiality | Integrity | Availability |
| NONE |
NONE |
COMPLETE |
|
| cvss-vector
via4
|
AV:N/AC:L/Au:N/C:N/I:N/A:C
|
| refmap
via4
|
| bid | 106511 | | cisco | 20190109 Cisco Email Security Appliance Memory Corruption Denial of Service Vulnerability |
|
| Last major update |
16-09-2020 - 14:13 |
| Published |
10-01-2019 - 18:29 |
| Last modified |
16-09-2020 - 14:13 |
