CVE-2023-37021

Public Exploit

Description

Open5GS MME version <= 2.6.4 contains an assertion that can be remotely triggered via a malformed ASN.1 packet over the S1AP interface. An attacker may send a `UE Context Modification Failure` message missing a required `MME_UE_S1AP_ID` field to repeatedly crash the MME, resulting in denial of service.

Category

8.6
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.06%
Third-Party Advisory cellularsecurity.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://cellularsecurity.org/ransacked third party advisory exploit technical description

Frequently Asked Questions

What is the severity of CVE-2023-37021?
CVE-2023-37021 has been scored as a high severity vulnerability.
How to fix CVE-2023-37021?
To fix CVE-2023-37021, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-37021 being actively exploited in the wild?
It is possible that CVE-2023-37021 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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