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From: "ben at decadentplace dot org dot uk" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug libgcj/24170] New: [SECURITY] readdir_r considered harmful Date: Sun, 02 Oct 2005 23:12:00 -0000 [thread overview] Message-ID: <bug-24170-7172@http.gcc.gnu.org/bugzilla/> (raw) The function java::io::File::performList in libjava/java/io/natFilePosix.cc calls readdir_r using a stack buffer with pathconf(path, _PC_NAME_MAX) + 1 extra bytes. It does not check for failure of pathconf(). Also there is a race condition between opendir() and pathconf(). This may well be exploitable for denial of service and code injection, particularly on Solaris and other platforms where struct dirent is defined with a small d_name array. I am attaching a draft copy of a security advisory that I intend to publish on 1st November. Please let me know if you have any unanswered questions about this issue or wish to provide information about workarounds, mitigation or versions that are or are not vulnerable for inclusion in the advisory. -- Summary: [SECURITY] readdir_r considered harmful Product: gcc Version: unknown Status: UNCONFIRMED Severity: major Priority: P1 Component: libgcj AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: ben at decadentplace dot org dot uk http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24170
next reply other threads:[~2005-10-02 23:12 UTC|newest] Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top 2005-10-02 23:12 ben at decadentplace dot org dot uk [this message] 2005-10-02 23:16 ` [Bug libgcj/24170] " ben at decadentplace dot org dot uk 2005-10-03 1:01 ` Daniel Berlin 2005-10-02 23:20 ` pinskia at gcc dot gnu dot org 2005-10-02 23:28 ` [Bug libgcj/24170] natFilePosix.cc seems to have a security problem pinskia at gcc dot gnu dot org 2005-10-02 23:38 ` ben at decadentplace dot org dot uk 2005-10-03 1:01 ` dberlin at dberlin dot org 2005-10-03 14:28 ` tromey at gcc dot gnu dot org 2005-11-10 11:33 ` ben at decadentplace dot org dot uk 2008-02-20 18:28 ` [Bug libgcj/24170] libjava " jason at gcc dot gnu dot org 2008-02-20 18:39 ` tromey at gcc dot gnu dot org 2008-02-20 19:10 ` tromey at gcc dot gnu dot org 2008-02-20 19:10 ` tromey at gcc dot gnu dot org
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