CVE-2011-0228

Severity: high (CVSS 7.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 6.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2011-08-29 · updated 2026-06-16
Weakness: CWE-20

Description

The Data Security component in Apple iOS before 4.2.10 and 4.3.x before 4.3.5 does not check the basicConstraints parameter during validation of X.509 certificate chains, which allows man-in-the-middle attackers to spoof an SSL server by using a non-CA certificate to sign a certificate for an arbitrary domain.

Affected products

Apple Iphone Os: through 4.2.9; 1.0.0, 1.0.1, 1.0.2, 1.1.0, 1.1.1, 1.1.2 (+31)

References

http://lists.apple.com/archives/security-announce/2011//Jul/msg00004.html
http://lists.apple.com/archives/security-announce/2011//Jul/msg00005.html
http://secunia.com/advisories/45369
http://securityreason.com/securityalert/8361
http://securitytracker.com/id?1025837
http://support.apple.com/kb/HT4824
http://support.apple.com/kb/HT4825
http://www.securityfocus.com/archive/1/518982/100/0/threaded
http://www.securityfocus.com/bid/48877
https://www.trustwave.com/spiderlabs/advisories/TWSL2011-007.txt
http://lists.apple.com/archives/security-announce/2011//Jul/msg00004.html
http://lists.apple.com/archives/security-announce/2011//Jul/msg00005.html

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