Vulnerability in Cisco iOS Xe Software
CVE-2024-20309
A vulnerability in auxiliary asynchronous port (AUX) functions of Cisco IOS XE Software could allow an authenticated, local attacker to cause an affected device to reload or stop responding. This vulnerability is due to the incorrect handling of specific ingress traffic when flow control hardware is enabled on the AUX port. An attacker could exploit this vulnerability by reverse telnetting to the AUX port and sending specific data after connecting. A successful exploit could allow the attacker to cause the device to reset or stop responding, resulting in a denial of service (DoS) condition.
EPSS: 0.001 (1.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.6 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H.
Affected products
- Cisco Ios Xe Software — versions 3.7.0S, 3.7.1S, 3.7.2S
- Cisco Ios_xe — versions 3.2.0se, 3.2.1se, 3.2.2se
Weakness classification (CWE)
Public proof-of-concept exploits
References
- psirt@cisco.com (Vendor Advisory)
Frequently asked questions
- What is CVE-2024-20309?
- CVE-2024-20309 is a medium-severity vulnerability in Cisco iOS Xe Software, classified under CWE-828. CVSS score: 5.6/10. Published 2024-03-27.
- How severe is CVE-2024-20309?
- Medium severity. CVSS v3 base score is 5.6 out of 10.
- Is CVE-2024-20309 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.