UpHeron
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Servers and applications

CVE-2003-0189

The authentication module for Apache 2.0.40 through 2.0.45 on Unix does not properly handle threads safely when using the crypt_r or crypt functions, which allows remote attackers to cause a denial of service (failed Basic authentication with valid usernames and passwords) when a threaded MPM is used.

Severity
Medium 5.0
Published
9 Jun 2003
Last changed
16 Jun 2026
Added to UpHeron
17 Oct 2026
Exploit chance
15% in the next 30 daysHigher than 96% of CVEs. EPSS by FIRST, 12 Nov 2026
Attack
Over the network · No login needed
Attacker can
Slow it down
CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Sources
NVD

Affected software

SoftwareAffected versions
Apache HTTP ServerServers and applications · cpe:a:apache:http_server
  • Version 2.0.40
  • Version 2.0.41
  • Version 2.0.42
  • Version 2.0.43
  • Version 2.0.44
  • Version 2.0.45

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2003-0189
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2003-0189