Published: 17/08/2015 Updated: 16/09/2017

CVSS v2 Base Score: 7.5 | Impact Score: 6.4 | Exploitability Score: 10

VMScore: 755

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

The TRE library in Libc in Apple iOS prior to 8.4.1 and OS X prior to 10.10.5 allows context-dependent malicious users to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted regular expression, a different vulnerability than CVE-2015-3797 and CVE-2015-3798.

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Source: codegooglecom/p/google-security-research/issues/detail?id=428 OS X Libc uses the slightly obscure TRE regex engine [ laurikarinet/tre/ ] If used in enhanced mode (by passing the REG_ENHANCED flag to regcomp) TRE supports arbitrary-width hex literals Here is the code used to parse them: /* Wide char */ char tmp[32] ...

CWE-119 http://lists.apple.com/archives/security-announce/2015/Aug/msg00001.html https://support.apple.com/kb/HT205030 http://lists.apple.com/archives/security-announce/2015/Aug/msg00002.html https://support.apple.com/kb/HT205031 http://www.securityfocus.com/bid/76343 http://www.securitytracker.com/id/1033275 https://www.exploit-db.com/exploits/38263/https://nvd.nist.gov https://www.exploit-db.com/exploits/38263/

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CVE-2015-3796

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