CVE-2011-3231

CVE-2011-3231 is a medium-severity vulnerability in Apple Safari with a CVSS 2.0 base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.

Key facts

• Severity: Medium (CVSS 2.0 base score 6.8)
• EPSS exploit prediction: 1% (68th percentile)
• Actively exploited: Not listed in CISA KEV
• Weakness: CWE-94
• Affected product: Apple Safari
• Published: 2011-10-14
• Last modified: 2026-06-16

Description

The SSL implementation in Apple Safari before 5.1.1 on Mac OS X before 10.7 accesses uninitialized memory during the processing of X.509 certificates, which allows remote web servers to execute arbitrary code via a crafted certificate.

Frequently asked questions

What is CVE-2011-3231?

The SSL implementation in Apple Safari before 5.1.1 on Mac OS X before 10.7 accesses uninitialized memory during the processing of X.509 certificates, which allows remote web servers to execute arbitrary code via a crafted certificate.

How severe is CVE-2011-3231?

CVE-2011-3231 has a CVSS 2.0 base score of 6.8, rated medium severity.

Is CVE-2011-3231 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-3231?

CVE-2011-3231 primarily affects Apple Safari. In total, 96 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-3231?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2011-3231 published?

CVE-2011-3231 was published on 2011-10-14 and last updated on 2026-06-16.

References

• http://lists.apple.com/archives/Security-announce/2011//Oct/msg00004.html
• http://osvdb.org/76390
• http://support.apple.com/kb/HT5000
• https://exchange.xforce.ibmcloud.com/vulnerabilities/70568

Affected products (96)

• cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.0:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.0:beta:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.0:beta2:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.0.0b1:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.0.0b2:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.0.3:85.8:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.0.3:85.8.1:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.0b1:-:mac:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.1:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.1.1:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.2:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.2.1:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.2.2:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.2.3:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.2.4:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.2.5:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.3:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.3.0:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.3.1:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.3.2:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.3.2:312.5:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:1.3.2:312.6:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:2:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:2.0:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:2.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:2.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:2.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:2.0.3:*:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:2.0.3:417.8:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:2.0.3:417.9:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:2.0.3:417.9.2:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:2.0.3:417.9.3:*:*:*:*:*:*
• cpe:2.3:a:apple:safari:2.0.4:*:*:*:*:*:*:*

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