CVE-2011-3253

Severity: low (CVSS 2.6 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2011-10-14 · updated 2026-06-16
Weakness: CWE-200

Description

CalDAV in Apple iOS before 5 does not validate X.509 certificates for SSL sessions, which allows man-in-the-middle attackers to spoof calendar servers and obtain sensitive information via an arbitrary certificate.

Affected products

Apple Iphone Os: 3.0, 3.1, 3.1.2, 3.1.3, 3.2, 3.2.1 (+13)

References

http://lists.apple.com/archives/Security-announce/2011//Oct/msg00001.html
http://support.apple.com/kb/HT4999
http://lists.apple.com/archives/Security-announce/2011//Oct/msg00001.html
http://support.apple.com/kb/HT4999

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