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5.0

Safari before 5.1.1 may let sites track you in private mode

CVE-2011-3242 · published 15 years ago
Summary

The Private Browsing feature in Safari versions earlier than 5.1.1 on Mac OS X does not honor the setting that should always block cookies. Because of this, web sites can place tracking cookies even when you think you are browsing privately. Update Safari to version 5.1.1 or later, or adjust your cookie settings manually, to stop the tracking.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
apple safari <= 5.1
1.0
1.0.0
1.0.0b1
1.0.0b2
1.0.1
1.0.2
1.0.3
1.0b1
1.1
1.1.0
1.1.1
57 more version ranges
cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
Original advisory text
The Private Browsing feature in Apple Safari before 5.1.1 on Mac OS X does not properly recognize the Always value of the Block Cookies setting, which makes it easier for remote web servers to trac...
The Private Browsing feature in Apple Safari before 5.1.1 on Mac OS X does not properly recognize the Always value of the Block Cookies setting, which makes it easier for remote web servers to track users via a cookie.
References
Fix within
Internet-facing 14 days
Internal 60 days
  • Not known to be exploited
  • Can be exploited automatically (estimated)
  • Gives an attacker partial control (estimated)
Severity
5.0 Medium
Exploitation
1% chance of attack within 30 days
Type
CWE-200Information Exposure
Timeline
Published14 Oct 2011
Updated4 Nov 2026
First seen29 Sep 2026
Sources
CVE-2011-3242 · NVD
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