Vulnerability Monitor

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CVE-1999-0063

Cisco IOS 12.0 and other versions can be crashed by malicious UDP packets to the syslog port.

Security Impact Summary

CVE-1999-0063 is a security vulnerability that . Impacting 1 product from cisco organizations running these solutions should prioritize assessment and patching.

Historical Context

Originally identified in 1999, this vulnerability predates many modern security frameworks and practices. The vulnerability landscape of that era was characterized by different threat models and less mature defense mechanisms compared to contemporary standards.

Published

1999-01-11T05:00:00.000

Last Modified

2025-04-03T01:03:51.193

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 5.0 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: PARTIAL
Exploitability Score

10.0

Impact Score

2.9

Weaknesses
  • Type: Primary
    NVD-CWE-Other
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System cisco ios 11.3aa Yes
Operating System cisco ios 11.3db Yes
Operating System cisco ios 12.0 Yes
Operating System cisco ios 12.0\(1\)w Yes
Operating System cisco ios 12.0\(1\)xa3 Yes
Operating System cisco ios 12.0\(1\)xb Yes
Operating System cisco ios 12.0\(1\)xe Yes
Operating System cisco ios 12.0\(2\)xc Yes
Operating System cisco ios 12.0\(2\)xd Yes
Operating System cisco ios 12.0db Yes
Operating System cisco ios 12.0s Yes
Operating System cisco ios 12.0t Yes
References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cisco's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.