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)
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
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
isc
References
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
Vendor Product Version
ISC ISC DHCP Affected: ISC DHCP 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0
Create a notification for this product.
Credits
ISC would like to thank Felix Wilhelm, Google Security Team, for reporting this vulnerability.
Show details on NVD website
To clipboard 

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  • 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.
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  • 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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