Multiple format string vulnerabilities in logging functions in mod_auth_pgsql before 2.0.3, when used for user authentication against a PostgreSQL database, allows remote unauthenticated attackers to execute arbitrary code, as demonstrated via the username.
Conclusion & alert: CVE-2005-3656 is rated High Risk (76.2/100): CVSS Critical severity, with high exploitation likelihood (EPSS 49.58%, 98th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +2.05% over the last day, indicating growing attacker interest. Mandatory action: 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.
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 | 47.53% | 49.58% | +2.05% |
| 2 | 2025-03-29 | 49.58% | 47.53% | -2.05% |
| 3 | 2025-03-19 | — | 49.58% | — |
Full EPSS history (10 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 10.0 | 2.0 | HIGH |
|
10.0 | 10.0 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
gentoo
|
high | CVE-2005-3656: 1 GLSA(s) (200601-05), 1 atom(s) (www-apache/mod_auth_pgsql); latest impact high. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2005-3656 |
redhat
|
critical | — | https://access.redhat.com/security/cve/CVE-2005-3656 |
ubuntu
|
medium | CVE-2005-3656 medium priority: Ubuntu including 1 source packages (libapache2-mod-auth-pgsql), 4 status rows across 4 suites (dapper, edgy, feisty, upstream): released 3, needs-triage 1. | https://ubuntu.com/security/CVE-2005-3656 |
: This vulnerability affects mod_auth_pgsql for Apache2, most likely in all Linux and UNIX environments. This vulnerability affects all versions of mod_auth_pgsql before 2.0.3
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| guiseppe_tanzilli_and_matthias_eckermann | mod_auth_pgsql | <= 2.0.3 | cpe:2.3:a:guiseppe_tanzilli_and_matthias_eckermann:mod_auth_pgsql:*:*:*:*:*:*:*:* |
| guiseppe_tanzilli_and_matthias_eckermann | mod_auth_pgsql | 0.9.5 | cpe:2.3:a:guiseppe_tanzilli_and_matthias_eckermann:mod_auth_pgsql:0.9.5:*:*:*:*:*:*:* |
| guiseppe_tanzilli_and_matthias_eckermann | mod_auth_pgsql | 0.9.6 | cpe:2.3:a:guiseppe_tanzilli_and_matthias_eckermann:mod_auth_pgsql:0.9.6:*:*:*:*:*:*:* |