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Servers and applications

CVE-2001-1534

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.

Severity
Low 2.1
Published
31 Dec 2001
Last changed
16 Jun 2026
Added to UpHeron
17 Oct 2026
Exploit chance
0.8% in the next 30 daysHigher than 55% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Session fixation (CWE-384)
Attack
Needs local access · No login needed
Attacker can
Read some data
CVSS vector
AV:L/AC:L/Au:N/C:P/I:N/A:N
Sources
NVD

Affected software

SoftwareAffected versions
Apache HTTP ServerServers and applications · cpe:a:apache:http_server
  • From 1.3.11 up to 1.3.20

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2001-1534
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2001-1534