CVE-2006-4403

Severity: medium (CVSS 4.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 3.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2006-11-30 · updated 2026-06-16

Description

The FTP server in Apple Mac OS X 10.4.8 and earlier, when FTP Access is enabled, will crash when a login failure occurs with a valid user name, which allows remote attackers to cause a denial of service (crash) and enumerate valid usernames.

Affected products

macOS: through 10.4.8

References

http://docs.info.apple.com/article.html?artnum=304829
http://lists.apple.com/archives/security-announce/2006/Nov/msg00001.html
http://secunia.com/advisories/23155
http://securitytracker.com/id?1017303
http://www.kb.cert.org/vuls/id/371648
http://www.osvdb.org/30734
http://www.securityfocus.com/bid/21335
http://www.us-cert.gov/cas/techalerts/TA06-333A.html
http://www.vupen.com/english/advisories/2006/4750
https://exchange.xforce.ibmcloud.com/vulnerabilities/30621
http://docs.info.apple.com/article.html?artnum=304829
http://lists.apple.com/archives/security-announce/2006/Nov/msg00001.html

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