CVE-2009-1384

pam_krb5 2.2.14 through 2.3.4, as used in Red Hat Enterprise Linux (RHEL) 5, generates different password prompts depending on whether the user account exists, which allows remote attackers to enumerate valid usernames.

Published: 2009-05-28 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-1384 is rated Moderate Risk (49.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.77%). 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-2009-1384

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 2025-12-28 1.50% 1.77% +0.28%
2 2025-12-27 1.80% 1.50% -0.30%
3 2025-11-03 — 1.80% —

Full EPSS history (18 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-1384

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N 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:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2009-1384

OS Trackers for CVE-2009-1384

vendor priority summary link
debian unimportant CVE-2009-1384 unimportant priority: Debian including 1 source packages (libpam-krb5), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2009-1384
redhat low — https://access.redhat.com/security/cve/CVE-2009-1384
suse medium CVE-2009-1384 severity moderate: SUSE including 10 source package names (pam_krb5, pam_krb5-2.4.13-1.36, …), 64 product×package rows across 35 product lines (SUSE CaaS Platform 4.0, SUSE Enterprise Storage 6, … (35 product lines)): Fixed 42, Known Not Affected 22. https://www.suse.com/security/cve/CVE-2009-1384/
ubuntu low CVE-2009-1384 low priority: Ubuntu including 1 source packages (libpam-krb5), 26 status rows across 26 suites (artful, bionic, cosmic, dapper, disco, eoan, hardy, intrepid, jaunty, karmic, lucid, maverick, natty, oneiric, precise, quantal, raring, saucy, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): ignored 21, not-affected 4, needs-triage 1. https://ubuntu.com/security/CVE-2009-1384

Vendor comments (NVD) for CVE-2009-1384

  • Red Hat (2010-03-31T00:00:00)

    This issue did not affect the versions of the pam_krb5 packages, as shipped with Red Hat Enterprise Linux 3 and 4. The issue was addressed in the pam_krb5 packages as shipped with Red Hat Enterprise Linux 5 via: https://rhn.redhat.com/errata/RHSA-2010-0258.html

Affected software / configurations for CVE-2009-1384

Vendor Product Version Raw CPE
eyrie pam-krb5 2.2.14 cpe:2.3:a:eyrie:pam-krb5:2.2.14:*:*:*:*:*:*:*
eyrie pam-krb5 2.3 cpe:2.3:a:eyrie:pam-krb5:2.3:*:*:*:*:*:*:*
eyrie pam-krb5 2.3.4 cpe:2.3:a:eyrie:pam-krb5:2.3.4:*:*:*:*:*:*:*

References for CVE-2009-1384

cvelogic Threat Intelligence