Memory corruption in Cisco Email Security Appliance - CVE-2018-15453
Published: January 9, 2019 / Updated: January 10, 2019
Vulnerability identifier: #VU16922
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2018-15453
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Cisco Systems, Inc
Affected software:
Cisco Email Security Appliance
Cisco Email Security Appliance
Detailed vulnerability description
The vulnerability allows a remote attacker to cause DoS condition.
The vulnerability exists in the Secure/Multipurpose Internet Mail Extensions (S/MIME) Decryption and Verification or S/MIME Public Key Harvesting features due to improper input validation of S/MIME-signed emails. A remote attacker can send a malicious S/MIME-signed email through a targeted device, trigger memory corruption if Decryption and Verification or Public Key Harvesting is configured and cause the filtering process to crash and restart.
How to mitigate CVE-2018-15453
The vulnerability has been addressed in the versions 12.0.0-281, 11.1.1-042, 11.1.1-037, 11.0.2-044.