CVE-2004-0640

Format string vulnerability in the SSL_set_verify function in telnetd.c for SSLtelnet daemon (SSLtelnetd) 0.13 allows remote attackers to execute arbitrary code.

Published: 2004-08-06 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2004-0640 is rated High Risk (67.5/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 3.45%). High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2004-0640

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 6.18% 3.45% -2.73%
2 2025-03-29 3.45% 6.18% +2.73%
3 2025-03-17 — 3.45% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2004-0640

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2004-0640

OS Trackers for CVE-2004-0640

vendor priority summary link
debian not yet assigned CVE-2004-0640 not yet assigned priority: Debian including 1 source packages (netkit-telnet-ssl), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2004-0640
ubuntu medium CVE-2004-0640 medium priority: Ubuntu including 1 source packages (netkit-telnet-ssl), 4 status rows across 4 suites (dapper, edgy, feisty, upstream): released 3, needs-triage 1. https://ubuntu.com/security/CVE-2004-0640

Affected software / configurations for CVE-2004-0640

Vendor Product Version Raw CPE
netkit linux_netkit 0.17 cpe:2.3:a:netkit:linux_netkit:0.17:*:*:*:*:*:*:*
netkit linux_netkit 0.17.17 cpe:2.3:a:netkit:linux_netkit:0.17.17:*:*:*:*:*:*:*
ssltelnetd secure_telnet 0.13.1 cpe:2.3:a:ssltelnetd:secure_telnet:0.13.1:*:*:*:*:*:*:*

References for CVE-2004-0640

cvelogic Threat Intelligence