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CVE-2019-15992

Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software Remote Code Execution Vulnerability

HIGH
7.2
CVSS Score
Published: September 23, 2020 at 12:27 AM UTC
Updated: August 11, 2026 at 07:33 PM UTC
3 products affected across 1 vendorAdaptive Security ApplianceSecure Firewall Threat DefenseSecure Firewall Management Center

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Severity
HIGH7.2
Exploit prediction
EPSS 4%
SSVC
No known exploit

Description

A vulnerability in the implementation of the Lua interpreter integrated in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker to execute arbitrary code with root privileges on the underlying Linux operating system of an affected device. The vulnerability is due to insufficient restrictions on the allowed Lua function calls within the context of user-supplied Lua scripts. A successful exploit could allow the attacker to trigger a heap overflow condition and execute arbitrary code with root privileges on the underlying Linux operating system of an affected device.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Adaptive Security Appliance· Cisco
95%
v < 9.6.4.369.10 ≤ v < 9.10.1.329.12 ≤ v < 9.12.39.13 ≤ v < 9.13.1.49.14 ≤ v < 9.14.2.79.15 ≤ v < 9.15.1.49.7 ≤ v < 9.8.4.159.9 ≤ v < 9.9.2.61
Affected range stops below 9.10.1.32, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.12.3, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.13.1.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.14.2.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.15.1.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.6.4.36, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.8.4.15, so it looks safe — our inference, not a vendor statement
Affected range stops below 9.9.2.61, so it looks safe — our inference, not a vendor statement
Secure Firewall Management Center· Cisco
95%
v < 6.2.3.166.3.0 ≤ v < 6.3.0.66.4.0 ≤ v < 6.4.0.76.5.0 ≤ v < 6.5.0.2
Affected range stops below 6.2.3.16, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.3.0.6, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.4.0.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 6.5.0.2, so it looks safe — our inference, not a vendor statement
Secure Firewall Threat Defense· Cisco
95%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisoryx_refsource_CISCOPatch
Source: [email protected]
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191112-asa-ftd-lua-rce

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.2HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-119CWE-787

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