CVE-2024-20309 is a medium-severity denial-of-service vulnerability affecting Cisco IOS XE Software, specifically within its auxiliary asynchronous port (AUX) functions. An authenticated, local attacker can exploit this by sending specific data via reverse Telnet to the AUX port when hardware flow control is enabled, causing the device to reload or become unresponsive. The CVSS score is 5.5, indicating a low attack complexity and requiring local authentication, with a high impact on availability. Currently, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
3.2.0seCPE matchmatch criteria | cpe:2.3:o:cisco:ios_xe:3.2.0se:*:*:*:*:*:*:* | ||
3.2.1seCPE matchmatch criteria | cpe:2.3:o:cisco:ios_xe:3.2.1se:*:*:*:*:*:*:* | ||
3.2.2seCPE matchmatch criteria | cpe:2.3:o:cisco:ios_xe:3.2.2se:*:*:*:*:*:*:* | ||
3.2.3seCPE matchmatch criteria | cpe:2.3:o:cisco:ios_xe:3.2.3se:*:*:*:*:*:*:* | ||
3.3.0seCPE matchmatch criteria | cpe:2.3:o:cisco:ios_xe:3.3.0se:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.