Improper input validation in Cisco iOS And Ios-Xe Software
CVE-2019-1738
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 is due to a parsing issue on DNS packets. An attacker could exploit these vulnerabilities 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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.025 (83.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Cisco Ios And Ios-xe Software — versions 3.16.0S, 3.16.1S, 3.16.0aS
- Cisco Ios — versions 15.1\(2\)sg8a, 15.1\(3\)svg3d, 15.1\(3\)svi1b
- Cisco Ios_xe — versions 3.2.0ja, 3.16.0as, 3.16.0bs
Weakness classification (CWE)
References
- psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Patch, Vendor Advisory)
- psirt@cisco.com (VDB Entry, Third Party Advisory, vdb-entry, Broken Link, x_refsource_BID)
Frequently asked questions
- What is CVE-2019-1738?
- CVE-2019-1738 is a high-severity vulnerability in Cisco iOS And Ios-Xe Software, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2019-03-28.
- How severe is CVE-2019-1738?
- High severity. CVSS v3 base score is 7.5 out of 10.