Vulnerability CVE-2019-12480
Published: 2019-05-30   Modified: 2019-05-31

Description:
BACnet Protocol Stack through 0.8.6 has a segmentation fault leading to denial of service in BACnet APDU Layer because a malformed DCC in AtomicWriteFile, AtomicReadFile and DeviceCommunicationControl services. An unauthenticated remote attacker could cause a denial of service (bacserv daemon crash) because there is an invalid read in bacdcode.c during parsing of alarm tag numbers.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
BACnet Stack 0.8.6 Denial Of Service
mmorillo
25.07.2019

Type:

CWE-125

 (Out-of-bounds Read)

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:N/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5/10
2.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Partial
Affected software
Bacnet protocol stack project -> Bacnet protocol stack 

 References:
http://packetstormsecurity.com/files/153716/BACnet-Stack-0.8.6-Denial-Of-Service.html
https://sourceforge.net/p/bacnet/bugs/62/
https://sourceforge.net/p/bacnet/code/3220
https://sourceforge.net/p/bacnet/code/3223
https://sourceforge.net/p/bacnet/code/3224
https://sourceforge.net/p/bacnet/code/3225
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