Medium 4.6Published Jun 5, 2013

CVE-2013-3951sys/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…

Updated under an hour ago (Nov 2, 2026, 12:23 AM ET)

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It affects apple iphone_os and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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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.

CVSS: 4.6 MEDIUM (v2.0, NVD)AV:L/AC:L/Au:N/C:P/I:P/A:P
Weakness (CWE): CWE-20
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Jun 16, 2026
First seen by InfoSec Signals: Nov 1, 2026

Affected products

Affected products

apple iphone_os apple:iphone_os	through 8.2; 6.1.3	NVD
apple mac_os_x apple:mac_os_x	through 10.10.4; 10.8.0; 10.8.1; 10.8.2; 10.8.3; 10.8.4	NVD
apple watchos apple:watchos	through 1.0.1	NVD

References

References

http://antid0te.com/syscan_2013/SyScan2013_Mountain_Lion_iOS_Vulnerabilities_Garage_Sale_Whitepaper.pdf	exploit
http://lists.apple.com/archives/security-announce/2015/Sep/msg00001.html	vendor-advisory
http://lists.apple.com/archives/security-announce/2015/Sep/msg00005.html	vendor-advisory
http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.html	vendor-advisory
http://www.securitytracker.com/id/1033703
http://www.syscan.org/index.php/sg/program/day/2
https://support.apple.com/HT205212	vendor-advisory
https://support.apple.com/HT205213	vendor-advisory
https://support.apple.com/HT205267	vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.