CVE-2019-12693: Cisco Adaptive Security Appliance Software Secure Copy Denial of Service Vulnerability

Severity: medium (CVSS 4.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-10-02 · updated 2026-06-17
Weakness: CWE-704

Description

A vulnerability in the Secure Copy (SCP) feature of Cisco Adaptive Security Appliance (ASA) Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition. The vulnerability is due to the use of an incorrect data type for a length variable. An attacker could exploit this vulnerability by initiating the transfer of a large file to an affected device via SCP. To exploit this vulnerability, the attacker would need to have valid privilege level 15 credentials on the affected device. A successful exploit could allow the attacker to cause the length variable to roll over, which could cause the affected device to crash.

Affected products

Cisco Adaptive Security Appliance: before 9.6.4.30 — fixed in 9.6.4.30
Cisco ASA Software: from 9.7 before 9.8.4; from 9.9 before 9.9.2.50; from 9.10 before 9.10.1.22; from 9.12 before 9.12.2.1 — fixed in 9.10.1.22, 9.12.2.1, 9.8.4, 9.9.2.50

How to fix

Upgrade to a fixed version: Cisco Adaptive Security Appliance 9.6.4.30; Cisco ASA Software 9.10.1.22, 9.12.2.1, 9.8.4, 9.9.2.50. Check the vendor advisory for mitigations.

References

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