High severity · published Jan 22, 2025
CVE-2023-37020
Open5GS MME versions <= 2.6.4 contain an assertion that can be remotely triggered via a malformed ASN.1 packet over the S1AP interface
8.6
CVSS
0.8%
EPSS
No
On KEV
Description
Open5GS MME versions <= 2.6.4 contain an assertion that can be remotely triggered via a malformed ASN.1 packet over the S1AP interface. An attacker may send a `UE Context Release Complete` message missing a required `MME_UE_S1AP_ID` field to repeatedly crash the MME, resulting in denial of service.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 56% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
Open5gs · Open5gs
through 2.6.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-37020
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-37020
Exploit
https://cellularsecurity.org/ransacked
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