Vulnerability · Published Mar 27, 2024 · Assigned by cisco

CVE-2024-20309

Medium 5.6

In plain English

A medium-severity security flaw in Cisco IOS XE Software from Cisco. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities).

Severity (CVSS 3.1)5.6Medium

Exploit odds (30 days)0.1%top 99.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
Cisco	Cisco IOS XE Software	3.7.0S3.7.1S3.7.2S3.7.3S3.7.4S3.7.5S3.7.6S3.7.7S

Weakness: CWE-828 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H

References

cisco-sa-aux-333WBz8f