CVE-2012-0388: n/a vulnerability

CVE-2012-0388: Memory leak in the H.323 inspection feature in the Zone-Based Firewall in Cisco IOS 12.4, 15.0, 15.1, and 1...

Memory leak in the H.323 inspection feature in the Zone-Based Firewall in Cisco IOS 12.4, 15.0, 15.1, and 15.2 allows remote attackers to cause a denial of service (memory consumption or device reload) via malformed transit H.323 traffic, aka Bug ID CSCtq45553.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 18:23 UTC (UTC+00:00)

Security readout for executives and security teams

This flaw can let remote traffic exhaust memory in certain Cisco IOS Zone-Based Firewall configurations, potentially causing a router or firewall to reload. The business risk is service interruption, not data theft, and exposure depends on H.323 inspection being enabled for transit traffic. Likely exposed systems are Cisco IOS devices on 12.4, 15.0, 15.1, or 15.2 using Zone-Based Firewall with H.323 inspection enabled and handling transit H.323 traffic. Treat this as a network availability risk. Prioritize internet-facing or partner-facing edge devices where reloads would disrupt routing, firewalling, voice, or video services. Mitigation focus: Review Cisco advisory cisco-sa-20120328-zbfw for fixed IOS guidance.; Upgrade affected Cisco IOS releases according to vendor guidance.; Disable H.323 inspection where it is not operationally required..

Prepared: Jun 24, 2026, 12:52 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Mar 29, 2012, 10:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors

0Timeline events

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2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
ciscoios-h323messages-dos(74436)CVE reference · vdb-entry, x_refsource_XF

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

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CWE details

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