BACnet Test Server up to 1.01 Packet resource consumption

Summaryinfo

A vulnerability, which was classified as problematic, has been found in BACnet Test Server up to 1.01. Affected by this vulnerability is an unknown functionality of the component Packet Handler. Performing a manipulation results in resource consumption. This vulnerability was named CVE-2020-36872. The attack may be initiated remotely. In addition, an exploit is available.

Detailsinfo

A vulnerability was found in BACnet Test Server up to 1.01. It has been classified as critical. This affects an unknown functionality of the component Packet Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. CWE is classifying the issue as CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. This is going to have an impact on availability. The summary by CVE is:

BACnet Test Server versions up to and including 1.01 contains a remote denial of service vulnerability in its BACnet/IP BVLC packet handling. The server fails to properly validate the BVLC Length field in incoming UDP BVLC frames on the default BACnet port (47808/udp). A remote unauthenticated attacker can send a malformed BVLC Length value to trigger an access violation and crash the application, resulting in a denial of service.

The weakness was presented by Gjoko Krstic as 159504. It is possible to read the advisory at zeroscience.mk. This vulnerability is uniquely identified as CVE-2020-36872 since 10/30/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are unknown but a public exploit is available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

The exploit is shared for download at exploit-db.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Exploit-DB (48860) and EUVD (EUVD-2020-30820). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• BACnet

Name

• Test Server

Version

• 1.01

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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CVSSv3info

CVSSv2info

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Threat Intelligenceinfo

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Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

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