CVE-2018-5733 (GCVE-0-2018-5733)
Vulnerability from cvelistv5 – Published: 2019-01-16 20:00 – Updated: 2025-04-25 23:02
VLAI
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
9 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 |
Impacted products
Date Public
2018-02-28 00:00
Credits
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Party Advisory\",\"VDB Entry\"]},{\"url\":\"http://www.securitytracker.com/id/1040437\",\"source\":\"security-officer@isc.org\",\"tags\":[\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"https://access.redhat.com/errata/RHSA-2018:0469\",\"source\":\"security-officer@isc.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://access.redhat.com/errata/RHSA-2018:0483\",\"source\":\"security-officer@isc.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://kb.isc.org/docs/aa-01567\",\"source\":\"security-officer@isc.org\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2018/03/msg00015.html\",\"source\":\"security-officer@isc.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://usn.ubuntu.com/3586-1/\",\"source\":\"security-officer@isc.org\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://usn.ubuntu.com/3586-2/\",\"source\":\"security-officer@isc.org\",\"tags\":[\"Third Party 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Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2018/03/msg00015.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://security.netapp.com/advisory/ntap-20250425-0010/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://usn.ubuntu.com/3586-1/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://usn.ubuntu.com/3586-2/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.debian.org/security/2018/dsa-4133\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]}]}}"
}
}
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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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