How severe is CVE-2013-3951?

CVE-2013-3951 has a CVSS 2.0 base score of 4.6, rated medium severity.

Is CVE-2013-3951 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-3951?

CVE-2013-3951 primarily affects Apple Iphone Os. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-3951?

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

When was CVE-2013-3951 published?

CVE-2013-3951 was published on 2013-06-05 and last updated on 2026-06-16.

CVE-2013-3951

CVE-2013-3951 is a medium-severity vulnerability in Apple Iphone Os with a CVSS 2.0 base score of 4.6. 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-20.

Key facts

Severity: Medium (CVSS 2.0 base score 4.6)
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Apple Iphone Os
Published: 2013-06-05
Last modified: 2026-06-16

Description

sys/openbsd/stack_protector.c in libc in Apple iOS 6.1.3 and Mac OS X 10.8.x does not properly parse the Apple strings employed in the user-space stack-cookie implementation, which allows local users to bypass cookie randomization by executing a program with a call-path beginning with the stack-guard= substring, as demonstrated by an iOS untethering attack or an attack against a setuid Mac OS X program.

Frequently asked questions

What is CVE-2013-3951?: sys/openbsd/stack_protector.c in libc in Apple iOS 6.1.3 and Mac OS X 10.8.x does not properly parse the Apple strings employed in the user-space stack-cookie implementation, which allows local users to bypass cookie randomization by executing a program with a call-path beginning with the stack-guard= substring, as demonstrated by an iOS untethering attack or an attack against a setuid Mac OS X program.
How severe is CVE-2013-3951?: CVE-2013-3951 has a CVSS 2.0 base score of 4.6, rated medium severity.
Is CVE-2013-3951 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-3951?: CVE-2013-3951 primarily affects Apple Iphone Os. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-3951?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-3951 published?: CVE-2013-3951 was published on 2013-06-05 and last updated on 2026-06-16.

References

Affected products (9)

cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:6.1.3:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.8.0:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.8.1:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.8.2:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.8.3:*:*:*:*:*:*:*
cpe:2.3:o:apple:mac_os_x:10.8.4:*:*:*:*:*:*:*

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