Improper input validation in Cisco iOS Xe Software
CVE-2019-1749
A vulnerability in the ingress traffic validation of Cisco IOS XE Software for Cisco Aggregation Services Router (ASR) 900 Route Switch Processor 3 (RSP3) could allow an unauthenticated, adjacent attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability exists because the software insufficiently validates ingress traffic on the ASIC used on the RSP3 platform. An attacker could exploit this vulnerability by sending a malformed OSPF version 2 (OSPFv2) message to an affected device. A successful exploit could allow the attacker to cause a reload of the iosd process, triggering a reload of the affected device and resulting in a DoS condition.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.006 (45.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
Affected products
- Cisco Ios Xe Software — versions 3.13.6aS, 3.16.0aS, 3.16.1aS
- Cisco Ios_xe — versions 3.13.6as, 3.16.0as, 3.16.1as
Weakness classification (CWE)
Public proof-of-concept exploits
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-2019-1749?
- CVE-2019-1749 is a high-severity vulnerability in Cisco iOS Xe Software, classified under Improper Input Validation. CVSS score: 7.4/10. Published 2019-03-28.
- How severe is CVE-2019-1749?
- High severity. CVSS v3 base score is 7.4 out of 10.
- Is CVE-2019-1749 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.