PT-2019-1185 · Cisco · Cisco Email Security Appliance+1

Published 2019-01-09 · Updated 2020-09-16 · CVE-2018-15453

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Cisco Email Security Appliance (ESA) (affected versions not specified)

Description The issue is related to improper input validation of S/MIME-signed emails in the Secure/Multipurpose Internet Mail Extensions (S/MIME) Decryption and Verification or S/MIME Public Key Harvesting features of Cisco AsyncOS Software. This could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on the device by sending a malicious S/MIME-signed email, potentially leading to a permanent DoS condition. The filtering process may crash and restart due to memory corruption, requiring manual intervention to recover the ESA.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

RCE

Memory Corruption

Weakness Enumeration

CWE-20

CWE-787

Related Identifiers

BDU:2019-00253

CVE-2018-15453

Affected Products

Cisco Asyncos

Cisco Email Security Appliance

References · 5

• https://bdu.fstec.ru/vul/2019-00253 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190109-esa-dos · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2018-15453 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2018-15453 · Security Note
• http://securityfocus.com/bid/106511 · Note