Cisco IOS and IOS XE Software Network-Based Application Recognition Denial of Service Vulnerabilities
CVE-2019-1740

8.6HIGH

Key Information:

Vendor

Cisco
Status
Cisco iOS And Cisco iOS-xe Software
Vendor
CVE Published:
28 March 2019

Badges

👾 Exploit Exists

What is CVE-2019-1740?

A vulnerability in the Network-Based Application Recognition (NBAR) feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload. This vulnerability are due to a parsing issue on DNS packets. An attacker could exploit this vulnerability by sending crafted DNS packets through routers that are running an affected version and have NBAR enabled. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a denial of service (DoS) condition.

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Affected Version(s)

Cisco IOS and Cisco IOS-XE Software 3.16.0S

Cisco IOS and Cisco IOS-XE Software 3.16.1S

Cisco IOS and Cisco IOS-XE Software 3.16.0aS

References

https://tools.cisco.com/security/center/content/CiscoSecu...
vendor-advisoryx_refsource_CISCO
http://www.securityfocus.com/bid/107597
vdb-entryx_refsource_BID

CVSS V3.1

Score:
8.6
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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