CVE-2011-2523 describes a critical backdoor vulnerability present in vsftpd version 2.3.4, specifically in builds downloaded between June 30 and July 3, 2011, affecting Debian Linux distributions. This flaw allows an unauthenticated attacker to execute arbitrary commands by opening a shell on TCP port 6200. With a CVSS score of 9.8 and an EPSS score indicating high exploitability, this vulnerability poses a severe risk, enabling complete compromise of confidentiality, integrity, and availability. While not listed in CISA's KEV catalog, multiple public exploit modules exist for Metasploit and Nuclei, confirming its ease of exploitation, despite minimal public discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
2.3.4CPE matchmatch criteria | cpe:2.3:a:vsftpd_project:vsftpd:2.3.4:*:*:*:*:*:*:* | ||
8.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | ||
9.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | ||
10.0CPE matchmatch criteria | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.