Date: Wed, 30 Jan 2013 06:40:30 -0500 (EST) From: Jan Lieskovsky <jlieskov@...hat.com> To: oss-security@...ts.openwall.com Cc: "Steven M. Christey" <coley@...us.mitre.org>, Jeff Law <law@...hat.com>, Paolo Bonzini <pbonzini@...hat.com>, Florian Weimer <fweimer@...hat.com> Subject: CVE Request -- glibc: DoS due to a buffer overrun in regexp matcher by processing multibyte characters Hello Kurt, Steve, vendors, a security flaw was found in the regular expression matching routine of glibc, the GNU libc libraries, processed multibyte characters input. If an application utilized the glibc's regular expression matching mechanism, an attacker could provide a specially-crafted input that, when processed would lead to that executable crash. Upstream bug report:  http://sourceware.org/bugzilla/show_bug.cgi?id=15078 Relevant patch:  http://sourceware.org/ml/libc-alpha/2013-01/msg00967.html More background: * (from Paolo): Jan 30 11:34:19 <bonzini> iankko: it is a memset(foo, 0, ...) that overruns the buffer, so it's not controllable by the attacker * but the denial of service scenario / attack vector is valid (consider network facing application using glibc's regexp matching on untrusted input) Could you allocate a CVE id for this? Thank you && Regards, Jan. -- Jan iankko Lieskovsky / Red Hat Security Response Team
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