CVE-2018-5733 (GCVE-0-2018-5733)
Vulnerability from cvelistv5 – Published: 2019-01-16 20:00 – Updated: 2025-04-25 23:02
VLAI
EPSS
VEX
Title
A malicious client can overflow a reference counter in ISC dhcpd
Summary
A malicious client which is allowed to send very large amounts of traffic (billions of packets) to a DHCP server can eventually overflow a 32-bit reference counter, potentially causing dhcpd to crash. Affects ISC DHCP 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0.
Severity
5.9 (Medium)
CWE
- Successful exploitation of this vulnerability may exhaust the memory available to dhcpd and/or cause it to crash, resulting in a denial of service to clients.
Assigner
References
10 references
| URL | Tags |
|---|---|
| https://kb.isc.org/docs/aa-01567 | x_refsource_CONFIRM |
| https://access.redhat.com/errata/RHSA-2018:0469 | vendor-advisoryx_refsource_REDHAT |
| https://www.debian.org/security/2018/dsa-4133 | vendor-advisoryx_refsource_DEBIAN |
| https://usn.ubuntu.com/3586-2/ | vendor-advisoryx_refsource_UBUNTU |
| https://access.redhat.com/errata/RHSA-2018:0483 | vendor-advisoryx_refsource_REDHAT |
| https://usn.ubuntu.com/3586-1/ | vendor-advisoryx_refsource_UBUNTU |
| http://www.securityfocus.com/bid/103188 | vdb-entryx_refsource_BID |
| http://www.securitytracker.com/id/1040437 | vdb-entryx_refsource_SECTRACK |
| https://lists.debian.org/debian-lts-announce/2018… | mailing-listx_refsource_MLIST |
| https://security.netapp.com/advisory/ntap-2025042… |
Impacted products
Date Public
2018-02-28 00:00
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"value": "A malicious client which is allowed to send very large amounts of traffic (billions of packets) to a DHCP server can eventually overflow a 32-bit reference counter, potentially causing dhcpd to crash. Affects ISC DHCP 4.1.0 -\u003e 4.1-ESV-R15, 4.2.0 -\u003e 4.2.8, 4.3.0 -\u003e 4.3.6, 4.4.0."
},
{
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"value": "Un cliente malicioso al que se le permite enviar grandes cantidades de tr\u00e1fico (miles de millones de paquetes) a un servidor DHCP puede terminar desbordando un contador de referencia de 32 bits, provocando el cierre inesperado de dhcpd. Afecta a ISC DHCP desde la versi\u00f3n 4.1.0 hasta la 4.1-ESV-R15, desde la versi\u00f3n 4.2.0 hasta la 4.2.8, desde la versi\u00f3n 4.3.0 hasta la 4.3.6 y a la versi\u00f3n 4.4.0."
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"published": "2019-01-16T20:29:00.753",
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},
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"source": "Red Hat CSAF VEX",
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}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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