CVE-2005-4591

Heap-based buffer overflow in bogofilter 0.96.2, 0.95.2, 0.94.14, 0.94.12, and other versions from 0.93.5 to 0.96.2, when using Unicode databases, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via "invalid input sequences" that lead to heap corruption when bogofilter or bogolexer converts character sets.

Published: 2005-12-31 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2005-4591 is rated Moderate Risk (60.8/100): CVSS High severity, with medium exploitation likelihood (EPSS 4.93%). Review affected assets and schedule 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-2005-4591

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 2026-03-02 5.47% 4.93% -0.54%
2 2025-03-30 3.87% 5.47% +1.60%
3 2025-03-29 — 3.87% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2005-4591

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P 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:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2005-4591

OS Trackers for CVE-2005-4591

vendor priority summary link
debian not yet assigned CVE-2005-4591 not yet assigned priority: Debian including 1 source packages (bogofilter), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2005-4591
suse medium — https://www.suse.com/security/cve/CVE-2005-4591/
ubuntu medium CVE-2005-4591 medium priority: Ubuntu including 1 source packages (bogofilter), 4 status rows across 4 suites (dapper, edgy, feisty, upstream): released 3, needs-triage 1. https://ubuntu.com/security/CVE-2005-4591

Affected software / configurations for CVE-2005-4591

Vendor Product Version Raw CPE
bogofilter email_filter 0.93.5 cpe:2.3:o:bogofilter:email_filter:0.93.5:*:*:*:*:*:*:*
bogofilter email_filter 0.94.12 cpe:2.3:o:bogofilter:email_filter:0.94.12:*:*:*:*:*:*:*
bogofilter email_filter 0.94.14 cpe:2.3:o:bogofilter:email_filter:0.94.14:*:*:*:*:*:*:*
bogofilter email_filter 0.95.2 cpe:2.3:o:bogofilter:email_filter:0.95.2:*:*:*:*:*:*:*
bogofilter email_filter 0.96.2 cpe:2.3:o:bogofilter:email_filter:0.96.2:*:*:*:*:*:*:*

References for CVE-2005-4591

cvelogic Threat Intelligence