Improper input validation in Cisco iOS Xe Software
CVE-2019-1756
A vulnerability in Cisco IOS XE Software could allow an authenticated, remote attacker to execute commands on the underlying Linux shell of an affected device with root privileges. The vulnerability occurs because the affected software improperly sanitizes user-supplied input. An attacker who has valid administrator access to an affected device could exploit this vulnerability by supplying a username with a malicious payload in the web UI and subsequently making a request to a specific endpoint in the web UI. A successful exploit could allow the attacker to run arbitrary commands as the root user, allowing complete compromise of the system.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.037 (88.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Cisco Ios Xe Software — versions 3.2.0JA, 16.7.1, 16.7.1a
- Cisco Ios — versions 11.0\(20.3\), 16.9\(1\)
- Cisco Ios_xe — versions 3.2.0ja, 16.7.1, 16.7.1a
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, x_refsource_BID)
Frequently asked questions
- What is CVE-2019-1756?
- CVE-2019-1756 is a high-severity vulnerability in Cisco iOS Xe Software, classified under Improper Input Validation. CVSS score: 7.2/10. Published 2019-03-28.
- How severe is CVE-2019-1756?
- High severity. CVSS v3 base score is 7.2 out of 10.