CVE-1999-0524

ICMP information such as (1) netmask and (2) timestamp is allowed from arbitrary hosts.

Published: 1997-08-01 Last update: 2026-05-28 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-1999-0524 is rated Low Risk (34.2/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.30%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-1999-0524

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-29 0.78% 0.30% -0.48%
2 2026-05-22 0.65% 0.78% +0.13%
3 2026-03-04 — 0.65% —

Full EPSS history (51 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-1999-0524

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.0 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:L)
Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N)
Service keeps running; no real outage angle.
 2.5 1.4 134c704f-9b21-4f2e-91b3-4a467353bcc0
2.1 2.0 LOW
AV:L/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 3.9 2.9 [email protected]

Weakness enumeration for CVE-1999-0524

GitHub Security Advisory for CVE-1999-0524

GHSA-5qg4-5cpf-4r9p · Severity: low — ICMP information such as (1) netmask and (2) timestamp is allowed from arbitrary hosts.

OS Trackers for CVE-1999-0524

vendor priority summary link
redhat — — https://access.redhat.com/security/cve/CVE-1999-0524

Vendor comments (NVD) for CVE-1999-0524

  • Red Hat (2010-01-05T00:00:00)

    Red Hat Enterprise Linux is configured by default to respond to all ICMP requests. Users may configure the firewall to prevent a system from responding to certain ICMP requests.

Affected software / configurations for CVE-1999-0524

Vendor Product Version Raw CPE
apple mac_os_x — cpe:2.3:o:apple:mac_os_x:-:*:*:*:*:*:*:*
apple macos — cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*
cisco ios — cpe:2.3:o:cisco:ios:-:*:*:*:*:*:*:*
hp hp-ux — cpe:2.3:o:hp:hp-ux:-:*:*:*:*:*:*:*
hp tru64 — cpe:2.3:o:hp:tru64:-:*:*:*:*:*:*:*
ibm aix — cpe:2.3:o:ibm:aix:-:*:*:*:*:*:*:*
ibm os2 — cpe:2.3:o:ibm:os2:-:*:*:*:*:*:*:*
linux linux_kernel — cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
microsoft windows — cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
novell netware — cpe:2.3:o:novell:netware:-:*:*:*:*:*:*:*
oracle solaris — cpe:2.3:o:oracle:solaris:-:*:*:*:*:*:-:*
sco sco_unix — cpe:2.3:o:sco:sco_unix:-:*:*:*:*:*:*:*
sgi irix — cpe:2.3:o:sgi:irix:-:*:*:*:*:*:*:*
windriver bsdos — cpe:2.3:o:windriver:bsdos:-:*:*:*:*:*:*:*

References for CVE-1999-0524

cvelogic Threat Intelligence