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From: "konstantin.s.serebryany at gmail dot com" <sourceware-bugzilla@sourceware.org> To: glibc-bugs@sourceware.org Subject: [Bug libc/18043] New: buffer-overflow (read past the end) in wordexp/parse_dollars/parse_param Date: Thu, 26 Feb 2015 23:10:00 -0000 [thread overview] Message-ID: <bug-18043-131@http.sourceware.org/bugzilla/> (raw) https://sourceware.org/bugzilla/show_bug.cgi?id=18043 Bug ID: 18043 Summary: buffer-overflow (read past the end) in wordexp/parse_dollars/parse_param Product: glibc Version: 2.21 Status: NEW Severity: normal Priority: P2 Component: libc Assignee: unassigned at sourceware dot org Reporter: konstantin.s.serebryany at gmail dot com CC: drepper.fsp at gmail dot com Flags: security+ #include <wordexp.h> #include <string.h> int main() { char *p = strdup("${"); wordexp_t w; wordexp(p, &w, 0); } ==15405== Invalid read of size 1 ==15405== at 0x4F1DE5C: parse_param (wordexp.c:1428) ==15405== by 0x4F1DE5C: parse_dollars (wordexp.c:2102) ==15405== by 0x4F1FFEB: wordexp (wordexp.c:2348) ==15405== by 0x4005AA: main ==15405== Address 0x51fb043 is 0 bytes after a block of size 3 alloc'd ==15405== at 0x4C2ABBD: malloc (vg_replace_malloc.c:296) ==15405== by 0x4EBE839: strdup (strdup.c:42) ==15405== by 0x40058E: main This time it's unclear to me how bad this bug is because the man page explicitly says that "there must not be any unescaped newline or |, &, ;, <, >, (, ), {, } characters" OTOH, buffer overflow is still a bit too much. 2.19 and fresh trunk are affected. Same fuzzer, see https://sourceware.org/glibc/wiki/FuzzingLibc -- You are receiving this mail because: You are on the CC list for the bug.
next reply other threads:[~2015-02-26 23:10 UTC|newest] Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-02-26 23:10 konstantin.s.serebryany at gmail dot com [this message] 2015-02-28 3:49 ` [Bug libc/18043] " ppluzhnikov at google dot com 2015-03-06 17:14 ` cvs-commit at gcc dot gnu.org 2015-03-06 17:16 ` ppluzhnikov at google dot com 2015-03-09 4:39 ` cvs-commit at gcc dot gnu.org 2015-03-09 6:21 ` konstantin.s.serebryany at gmail dot com 2015-03-09 14:25 ` cvs-commit at gcc dot gnu.org 2015-03-09 14:28 ` ppluzhnikov at google dot com 2015-03-09 16:42 ` konstantin.s.serebryany at gmail dot com 2015-03-09 17:55 ` konstantin.s.serebryany at gmail dot com 2015-03-09 18:20 ` ppluzhnikov at google dot com 2015-03-09 18:39 ` konstantin.s.serebryany at gmail dot com 2015-03-09 18:47 ` konstantin.s.serebryany at gmail dot com 2015-03-09 18:51 ` ppluzhnikov at google dot com 2015-03-09 19:09 ` konstantin.s.serebryany at gmail dot com 2015-03-09 19:10 ` konstantin.s.serebryany at gmail dot com 2015-03-09 19:22 ` ppluzhnikov at google dot com 2015-03-09 19:28 ` konstantin.s.serebryany at gmail dot com 2015-03-09 22:25 ` ppluzhnikov at google dot com 2015-03-09 22:35 ` konstantin.s.serebryany at gmail dot com 2015-03-09 23:16 ` ppluzhnikov at google dot com 2015-03-11 15:57 ` cvs-commit at gcc dot gnu.org 2015-03-11 16:01 ` ppluzhnikov at google dot com 2015-03-19 14:55 ` fweimer at redhat dot com
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