CVE-2019-6474 (GCVE-0-2019-6474)

Vulnerability from cvelistv5 – Published: 2019-10-16 17:22 – Updated: 2024-09-16 22:19
VLAI?
Summary
A missing check on incoming client requests can be exploited to cause a situation where the Kea server's lease storage contains leases which are rejected as invalid when the server tries to load leases from storage on restart. If the number of such leases exceeds a hard-coded limit in the Kea code, a server trying to restart will conclude that there is a problem with its lease store and give up. Versions affected: 1.4.0 to 1.5.0, 1.6.0-beta1, and 1.6.0-beta2
Severity ?
5.7 (Medium)
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CWE
  • Only Kea servers which use memfile storage for leases are affected by this vulnerability. An attacker can exploit the missing check to deliberately create a situation where the server will not restart properly should it stop for any reason.
Assigner
isc
References
Impacted products
Vendor Product Version
ISC Kea Affected: 1.4.0 to 1.5.0
Affected: 1.6.0-beta1
Affected: 1.6.0-beta2
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Sightings

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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.
  • 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.



Detection rules are retrieved from Rulezet.