Unrated severityNVD Advisory· Published Aug 28, 2014· Updated Jun 17, 2026

CVE-2014-3347

Description

Cisco IOS 15.1(4)M2 on Cisco 1800 ISR devices, when the ISDN Basic Rate Interface is enabled, allows remote attackers to cause a denial of service (device hang) by leveraging knowledge of the ISDN phone number to trigger an interrupt timer collision during entropy collection, leading to an invalid state of the hardware encryption module, aka Bug ID CSCul77897.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Cisco Systems, Inc./1801 Integrated Service Router
cpe:2.3:h:cisco:1801_integrated_service_router:-:*:*:*:*:*:*:*
Cisco Systems, Inc./1802 Integrated Service Router
cpe:2.3:h:cisco:1802_integrated_service_router:-:*:*:*:*:*:*:*
Cisco Systems, Inc./1803 Integrated Service Router
cpe:2.3:h:cisco:1803_integrated_service_router:-:*:*:*:*:*:*:*
Cisco Systems, Inc./1811 Integrated Service Router
cpe:2.3:h:cisco:1811_integrated_service_router:-:*:*:*:*:*:*:*
Cisco Systems, Inc./1812 Integrated Service Router
cpe:2.3:h:cisco:1812_integrated_service_router:-:*:*:*:*:*:*:*
Cisco Systems, Inc./1841 Integrated Service Router
cpe:2.3:h:cisco:1841_integrated_service_router:-:*:*:*:*:*:*:*
Cisco Systems, Inc./1861 Integrated Service Router
cpe:2.3:h:cisco:1861_integrated_service_router:-:*:*:*:*:*:*:*
Cisco Systems, Inc./Cisco iOS2 versions
cpe:2.3:o:cisco:ios:15.1\(4\)m2:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:cisco:ios:15.1\(4\)m2:*:*:*:*:*:*:*
- (no CPE)range: =15.1(4)M2

Patches

Vulnerability mechanics

References

tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2014-3347nvdVendor Advisory
tools.cisco.com/security/center/viewAlert.xnvdVendor Advisory
www.securityfocus.com/bid/69439nvd
www.securitytracker.com/id/1030772nvd
exchange.xforce.ibmcloud.com/vulnerabilities/95558nvd

News mentions

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