#VU56616 Buffer overflow


Published: 2021-09-15

Vulnerability identifier: #VU56616

Vulnerability risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-27391

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
APOGEE MBC
Hardware solutions / Other hardware appliances
APOGEE MEC
Hardware solutions / Other hardware appliances
APOGEE PXC Compact (P2 Ethernet)
Hardware solutions / Other hardware appliances
APOGEE PXC Modular (P2 Ethernet)
Hardware solutions / Other hardware appliances
APOGEE PXC Compact (BACnet)
Hardware solutions / Other hardware appliances
APOGEE PXC Modular (BACnet)
Hardware solutions / Other hardware appliances
TALON TC Compact (BACnet)
Hardware solutions / Other hardware appliances
TALON TC Modular (BACnet)
Hardware solutions / Other hardware appliances

Vendor: Siemens

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when parsing specific requests. A remote attacker can trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

APOGEE MBC: 2.6.3

APOGEE MEC: 2.6.3

APOGEE PXC Compact (P2 Ethernet): 2.8

APOGEE PXC Modular (P2 Ethernet): 2.8

APOGEE PXC Compact (BACnet): before 3.5.3

APOGEE PXC Modular (BACnet): before 3.5.3

TALON TC Compact (BACnet): before 3.5.3

TALON TC Modular (BACnet): before 3.5.3

CPE

External links
https://cert-portal.siemens.com/productcert/pdf/ssa-944498.pdf


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.


Latest bulletins with this vulnerability