PT-2019-1715 · Cisco · Cisco Ios+1

Published 2019-03-27 · Updated 2022-03-18 · CVE-2019-1740

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Cisco IOS Software and Cisco IOS XE Software (affected versions not specified)

Description A vulnerability in the Network-Based Application Recognition (NBAR) feature could allow an unauthenticated, remote attacker to cause an affected device to reload 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, resulting in a denial of service (DoS) condition.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2019-01334

BDU:2019-01335

CVE-2019-1740

Affected Products

Cisco Ios

Cisco Ios Xe

References · 6

• https://bdu.fstec.ru/vul/2019-01334 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2019-1740 · Security Note
• https://bdu.fstec.ru/vul/2019-01335 · Security Note
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190327-nbar · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2019-1740 · Vendor Advisory
• http://securityfocus.com/bid/107597 · Note