Cisco ASA/Firepower Threat Defense Lua Interpreter memory corruption

Summaryinfo

A vulnerability identified as critical has been detected in Cisco ASA and Firepower Threat Defense. The impacted element is an unknown function of the component Lua Interpreter. Performing a manipulation results in memory corruption. This vulnerability is identified as CVE-2019-15992. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Cisco ASA and Firepower Threat Defense (Firewall Software) (affected version not known). This affects some unknown functionality of the component Lua Interpreter. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was released 09/23/2020 as cisco-sa-20191112-asa-ftd-lua- as confirmed advisory (Website). It is possible to read the advisory at tools.cisco.com. This vulnerability is uniquely identified as CVE-2019-15992 since 09/06/2019. It is possible to initiate the attack remotely. A authentication is required for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 09/23/2020).

Upgrading eliminates this vulnerability.

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Productinfo

Type

• Firewall Software

Vendor

• Cisco

Name

• ASA
• Firepower Threat Defense

License

• commercial

Website

• Vendor: https://www.cisco.com/

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