mod_usertrack in Apache 1.3.11 through 1.3.20 generates session ID's using predictable information including host IP address, system time and server process ID, which allows local users to obtain session ID's and bypass authentication when these session ID's are used for authentication
Published Jul 14, 2005
2.1
LOWCVSS 2.0
EPSS 0.70%
Description
mod_usertrack in Apache 1.3.11 through 1.3.20 generates session ID's using predictable information including host IP address, system time and server process ID, which allows local users to obtain session ID's and bypass authentication when these session ID's are used for authentication.
Affected products
No data.
- ≥ 1.3.11 · ≤ 1.3.20
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Red Hat statement
This is not a security issue. The mod_usertrack cookies are not designed to be used for authentication.
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:L/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 (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.70% (0.00703) | 51.53th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.70% (0.00703) | 48.23th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.13% (0.00125) | 29.29th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00042) | 5.07th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00890) | 30.33th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.89% (0.00890) | 28.64th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00890) | 26.62th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00890) | 12.04th | v2 (v2022.01.01) |
References (6)
- http://cert.uni-stuttgart.de/archive/bugtraq/2001/11/msg00084.html mailing-listx_refsource_BUGTRAQBroken Link
- http://www.iss.net/security_center/static/7494.php vdb-entryx_refsource_XFBroken Link
- http://www.securityfocus.com/bid/3521 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- https://access.redhat.com/security/cve/CVE-2001-1534 Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2001-1534
- https://www.cve.org/CVERecord?id=CVE-2001-1534
| Link | Providers | Tags |
|---|---|---|
| http://cert.uni-stuttgart.de/archive/bugtraq/2001/11/msg00084.html | mailing-listx_refsource_BUGTRAQBroken Link | |
| http://www.iss.net/security_center/static/7494.php | vdb-entryx_refsource_XFBroken Link | |
| http://www.securityfocus.com/bid/3521 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| https://access.redhat.com/security/cve/CVE-2001-1534 | Vendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2001-1534 | ||
| https://www.cve.org/CVERecord?id=CVE-2001-1534 |
Change history (0)
No recorded changes yet.