CVE-2018-20679 (GCVE-0-2018-20679)
Vulnerability from cvelistv5 – Published: 2019-01-09 16:00 – Updated: 2025-06-09 15:26
VLAI
EPSS
VEX
Summary
An issue was discovered in BusyBox before 1.30.0. An out of bounds read in udhcp components (consumed by the DHCP server, client, and relay) allows a remote attacker to leak sensitive information from the stack by sending a crafted DHCP message. This is related to verification in udhcp_get_option() in networking/udhcp/common.c that 4-byte options are indeed 4 bytes.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-06-09 15:25 UTC
CWE
- n/a
- CWE-125 - Out-of-bounds Read
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://git.busybox.net/busybox/commit/?id=6d3b4b… | x_refsource_MISC |
| https://busybox.net/news.html | x_refsource_MISC |
| https://bugs.busybox.net/show_bug.cgi?id=11506 | x_refsource_MISC |
| https://usn.ubuntu.com/3935-1/ | vendor-advisoryx_refsource_UBUNTU |
| http://seclists.org/fulldisclosure/2019/Sep/7 | mailing-listx_refsource_FULLDISC |
| https://seclists.org/bugtraq/2019/Sep/7 | mailing-listx_refsource_BUGTRAQ |
| http://packetstormsecurity.com/files/154361/Cisco… | x_refsource_MISC |
Date Public
2019-01-09 00:00
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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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