Service crash via negative packet-size allocation
Published Aug 28, 2023 · Updated Aug 2, 2024
Buffer overflow in O-RAN Software Community RMR 4.9.0 allows remote attackers to crash an RMR service via a malformed packet-size field. The receive path decodes the first four packet bytes as a signed negative size and uses that value during subsequent memory allocation, triggering a core dump. An attacker must be able to send RMR traffic to the service; exploitation interrupts that RMR process and its dependent communications.
Summary
What happened
Buffer overflow in O-RAN Software Community RMR 4.9.0 allows remote attackers to crash an RMR service via a malformed packet-size field. The receive path decodes the first four packet bytes as a signed negative size and uses that value during subsequent memory allocation, triggering a core dump. An attacker must be able to send RMR traffic to the service; exploitation interrupts that RMR process and its dependent communications.
The record
- CVE
- CVE-2023-40998
- Published
- Aug 28, 2023
- Updated
- Aug 2, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-120, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 28, 2023CVE publishedPublication date reported by the CVE source.
- 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?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
- Negative RMR packet-size fuzzer demonstrationproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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