CVE-2024-37877Public exploitNetwork attack vector

gNodeB crash via malformed RLS PDU length

Published Jun 13, 2024 · Updated Aug 2, 2024

Out-of-bounds read in UERANSIM before 3.2.6 allows remote attackers to crash a gNodeB with a malformed RLS PDU length. DecodeRlsMessage accepts the declared length, after which readOctetString reads beyond the available octet buffer. Access to the gNodeB UDP RLS listener is sufficient, and the demonstrated consequence is a denial-of-service crash.

CVSS severity5.5
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in UERANSIM before 3.2.6 allows remote attackers to crash a gNodeB with a malformed RLS PDU length. DecodeRlsMessage accepts the declared length, after which readOctetString reads beyond the available octet buffer. Access to the gNodeB UDP RLS listener is sufficient, and the demonstrated consequence is a denial-of-service crash.

The record

CVE
CVE-2024-37877
Published
Jun 13, 2024
Updated
Aug 2, 2024
Vendor
Ali Güngör
Product
UERANSIM
Classifications
CWE-125, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 13, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <3.2.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Ali Güngör · UERANSIMversion=0 <3.2.6

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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