CVE-2018-13457 describes a NULL pointer dereference vulnerability in Nagios Core 4.4.1 and earlier, specifically within the qh_echo function. This flaw allows an unauthenticated local attacker to trigger a denial-of-service condition by sending a specially crafted payload to the listening UNIX socket. Rated Medium severity with a CVSS score of 5.5, the vulnerability requires local access and user interaction (UI:R) to exploit, resulting in high availability impact. While not listed on CISA's KEV catalog or Hot List, public exploit code exists on ExploitDB, though there is no evidence of active exploitation or significant community discussion.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 4.4.1CPE matchmatch criteria | cpe:2.3:a:nagios:nagios_core:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.0
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
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