Apache on Red Hat Linux with with the UserDir directive enabled generates different error codes when a username exists and there is no public_html directory and when the username does not exist, which could allow remote attackers to determine valid usernames on the server
Published Feb 2, 2002
5.0
MEDIUMCVSS 2.0
EPSS 65.56%
Description
Apache on Red Hat Linux with with the UserDir directive enabled generates different error codes when a username exists and there is no public_html directory and when the username does not exist, which could allow remote attackers to determine valid usernames on the server.
Affected products
Remediation
Red Hat statement
Red Hat does not consider this flaw to be a security issue. If UserDir is enabled, you can configure httpd to respond with a custom error page and a single error code whether the user exists or not. The UserDir functionality is disabled by default in httpd on Red Hat Enterprise Linux 5, 6, and 7, and is thus not exposed on default installations.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:P/I:N/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 65.56% (0.65563) | 99.24th | v5 (v2026.06.15) |
| Jun 15, 2026 | 65.56% (0.65563) | 99.16th | v5 (v2026.06.15) |
| Aug 25, 2025 | 68.12% (0.68119) | 98.53th | v4 (v2025.03.14) |
| Mar 30, 2025 | 71.84% (0.71836) | 98.65th | v4 (v2025.03.14) |
| Mar 29, 2025 | 67.06% (0.67065) | 98.00th | v4 (v2025.03.14) |
| Mar 17, 2025 | 71.84% (0.71836) | 98.65th | v4 (v2025.03.14) |
| Dec 17, 2024 | 12.27% (0.12270) | 95.38th | v3 (v2023.03.01) |
| Mar 7, 2023 | 3.63% (0.03631) | 90.25th | v3 (v2023.03.01) |
| Mar 6, 2023 | 72.01% (0.72014) | 99.22th | v2 (v2022.01.01) |
| Feb 4, 2022 | 72.01% (0.72014) | 99.06th | v2 (v2022.01.01) |
No CWE recorded.
References (9)
- http://archives.neohapsis.com/archives/vuln-dev/2000-q3/0083.html mailing-listx_refsource_VULN-DEVVendor Advisory
- http://archives.neohapsis.com/archives/vuln-dev/2000-q3/0087.html mailing-listx_refsource_VULN-DEV
- http://archives.neohapsis.com/archives/vuln-dev/2000-q3/0094.html mailing-listx_refsource_VULN-DEVVendor Advisory
- http://www.securityfocus.com/archive/1/213667 mailing-listx_refsource_BUGTRAQVendor Advisory
- http://www.securityfocus.com/bid/3335 vdb-entryx_refsource_BIDExploitPatchVendor Advisory
- https://access.redhat.com/security/cve/CVE-2001-1013 Vendor Advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/7129 vdb-entryx_refsource_XF
- https://nvd.nist.gov/vuln/detail/CVE-2001-1013
- https://www.cve.org/CVERecord?id=CVE-2001-1013
| Link | Providers | Tags |
|---|---|---|
| http://archives.neohapsis.com/archives/vuln-dev/2000-q3/0083.html | mailing-listx_refsource_VULN-DEVVendor Advisory | |
| http://archives.neohapsis.com/archives/vuln-dev/2000-q3/0087.html | mailing-listx_refsource_VULN-DEV | |
| http://archives.neohapsis.com/archives/vuln-dev/2000-q3/0094.html | mailing-listx_refsource_VULN-DEVVendor Advisory | |
| http://www.securityfocus.com/archive/1/213667 | mailing-listx_refsource_BUGTRAQVendor Advisory | |
| http://www.securityfocus.com/bid/3335 | vdb-entryx_refsource_BIDExploitPatchVendor Advisory | |
| https://access.redhat.com/security/cve/CVE-2001-1013 | Vendor Advisory | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/7129 | vdb-entryx_refsource_XF | |
| https://nvd.nist.gov/vuln/detail/CVE-2001-1013 | ||
| https://www.cve.org/CVERecord?id=CVE-2001-1013 |
Change history (0)
No recorded changes yet.