{"cve":"CVE-2013-3951","nvd":{"published":"2013-06-05T14:39:55.900","modified":"2026-06-16T23:56:04.663","status":"Modified","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.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-20"],"references":["http://antid0te.com/syscan_2013/SyScan2013_Mountain_Lion_iOS_Vulnerabilities_Garage_Sale_Whitepaper.pdf","http://lists.apple.com/archives/security-announce/2015/Sep/msg00001.html","http://lists.apple.com/archives/security-announce/2015/Sep/msg00005.html","http://lists.apple.com/archives/security-announce/2015/Sep/msg00008.html","http://www.securitytracker.com/id/1033703"],"products":["apple:iphone_os","apple:mac_os_x","apple:watchos"],"source":"nvd","synced_at":"2026-10-19T20:29:16.037019470+00:00"},"epss":{"cve":"CVE-2013-3951","score":0.00455,"percentile":0.39506,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}