CVE-2020-15795 Memory corruption in APOGEE PXC Compact (BACnet)
A memory corruption vulnerability in Siemens building automation systems allows attackers to execute code or cause denial of service via malformed DNS responses.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-15795?
CVE-2020-15795 is a high-severity memory corruption vulnerability in Siemens APOGEE PXC Compact (BACnet), published on 22 Apr 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability has been identified in APOGEE PXC Compact (BACnet) (All versions < V3.5.5), APOGEE PXC Compact (P2 Ethernet) (All versions < V2.8.20), APOGEE PXC Modular (BACnet) (All versions < V3.5.5), APOGEE PXC Modular (P2 Ethernet) (All versions < V2.8.20), Nucleus NET (All versions < V5.2), Nucleus Source Code (Versions including affected DNS modules), TALON TC Compact (BACnet) (All versions < V3.5.5), TALON TC Modular (BACnet) (All versions < V3.5.5). The DNS domain name label parsing functionality does not properly validate the names in DNS-responses. The parsing of malformed responses could result in a write past the end of an allocated structure. An attacker with a privileged position in the network could leverage this vulnerability to execute code in the context of the current process or cause a denial-of-service condition.
Weakness: CWE-787
Which versions are affected by CVE-2020-15795?
It affects 2 products.
Products include Siemens Nucleus Net, Siemens Nucleus Source Code.
How do I fix CVE-2020-15795?
No fix has been published for CVE-2020-15795 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2020-15795 being exploited?
There is no known exploitation of CVE-2020-15795 in the wild and no public exploit code.
Other vulnerabilities in Siemens APOGEE PXC Compact (BACnet)
- CVE-2020-27009 Memory corruption in APOGEE PXC Compact (BACnet)
- CVE-2020-27736 Memory corruption in APOGEE PXC Compact (BACnet)
- CVE-2020-27737 Memory corruption in APOGEE PXC Compact (BACnet)
- CVE-2020-27738 Memory corruption in APOGEE PXC Compact (BACnet)
- CVE-2021-25677 Other in APOGEE PXC Compact (BACnet)
Sources
Also known as GHSA-cw98-4v34-2rc8.