CVE-2021-37182 Denial of service in SCALANCE XM408-4C
An unauthenticated remote attacker can cause network interruptions by sending crafted OSPF packets to affected Siemens SCALANCE switches with OSPF enabled.
- 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-2021-37182?
CVE-2021-37182 is a high-severity denial of service vulnerability in Siemens SCALANCE XM408-4C, published on 14 Jun 2022. 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 SCALANCE XM408-4C (All versions < V6.5), SCALANCE XM408-4C (L3 int.) (All versions < V6.5), SCALANCE XM408-8C (All versions < V6.5), SCALANCE XM408-8C (L3 int.) (All versions < V6.5), SCALANCE XM416-4C (All versions < V6.5), SCALANCE XM416-4C (L3 int.) (All versions < V6.5), SCALANCE XR524-8C, 1x230V (All versions < V6.5), SCALANCE XR524-8C, 1x230V (L3 int.) (All versions < V6.5), SCALANCE XR524-8C, 24V (All versions < V6.5), SCALANCE XR524-8C, 24V (L3 int.) (All versions < V6.5), SCALANCE XR524-8C, 2x230V (All versions < V6.5), SCALANCE XR524-8C, 2x230V (L3 int.) (All versions < V6.5), SCALANCE XR526-8C, 1x230V (All versions < V6.5), SCALANCE XR526-8C, 1x230V (L3 int.) (All versions < V6.5), SCALANCE XR526-8C, 24V (All versions < V6.5), SCALANCE XR526-8C, 24V (L3 int.) (All versions < V6.5), SCALANCE XR526-8C, 2x230V (All versions < V6.5), SCALANCE XR526-8C, 2x230V (L3 int.) (All versions < V6.5), SCALANCE XR528-6M (All versions < V6.5), SCALANCE XR528-6M (2HR2) (All versions < V6.5), SCALANCE XR528-6M (2HR2, L3 int.) (All versions < V6.5), SCALANCE XR528-6M (L3 int.) (All versions < V6.5), SCALANCE XR552-12M (All versions < V6.5), SCALANCE XR552-12M (2HR2) (All versions < V6.5), SCALANCE XR552-12M (2HR2) (All versions < V6.5), SCALANCE XR552-12M (2HR2, L3 int.) (All versions < V6.5). The OSPF protocol implementation in affected devices fails to verify the checksum and length fields in the OSPF LS Update messages. An unauthenticated remote attacker could exploit this vulnerability to cause interruptions in the network by sending specially crafted OSPF packets. Successful exploitation requires OSPF to be enabled on an affected device.
Weakness: CWE-354
Which versions are affected by CVE-2021-37182?
It affects 17 products.
Products include Siemens Scalance Xm408-4c Firmware, Siemens Scalance Xm408-4c L3 Firmware, Siemens Scalance Xm408-8c Firmware, Siemens Scalance Xm408-8c L3 Firmware, Siemens Scalance Xm416-4c Firmware, Siemens Scalance Xm416-4c L3 Firmware and 11 more.
How do I fix CVE-2021-37182?
No fix has been published for CVE-2021-37182 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-37182 being exploited?
There is no known exploitation of CVE-2021-37182 in the wild and no public exploit code.
Sources
Also known as GHSA-p4gg-xc3g-rqm7.