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BASH PATCH REPORT
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=================
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Bash-Release: 4.2
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Patch-ID: bash42-044
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Bug-Reported-by: "Dashing" <dashing@hushmail.com>
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Bug-Reference-ID: <20130211175049.D90786F446@smtp.hushmail.com>
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Bug-Reference-URL: http://lists.gnu.org/archive/html/bug-bash/2013-02/msg00030.html
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Bug-Description:
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When converting a multibyte string to a wide character string as part of
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pattern matching, bash does not handle the end of the string correctly,
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causing the search for the NUL to go beyond the end of the string and
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reference random memory. Depending on the contents of that memory, bash
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can produce errors or crash.
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Patch (apply with `patch -p0'):
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*** ../bash-4.2-patched/lib/glob/xmbsrtowcs.c 2012-07-08 21:53:19.000000000 -0400
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--- lib/glob/xmbsrtowcs.c 2013-02-12 12:00:39.000000000 -0500
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***************
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*** 217,220 ****
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--- 217,226 ----
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n = mbsnrtowcs(wsbuf+wcnum, &p, nms, wsbuf_size-wcnum, &state);
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+ if (n == 0 && p == 0)
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+ {
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+ wsbuf[wcnum] = L'\0';
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+ break;
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+ }
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+
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/* Compensate for taking single byte on wcs conversion failure above. */
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if (wcslength == 1 && (n == 0 || n == (size_t)-1))
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***************
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*** 222,226 ****
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state = tmp_state;
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p = tmp_p;
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! wsbuf[wcnum++] = *p++;
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}
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else
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--- 228,238 ----
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state = tmp_state;
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p = tmp_p;
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! wsbuf[wcnum] = *p;
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! if (*p == 0)
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! break;
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! else
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! {
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! wcnum++; p++;
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! }
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}
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else
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*** ../bash-4.2-patched/patchlevel.h Sat Jun 12 20:14:48 2010
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--- patchlevel.h Thu Feb 24 21:41:34 2011
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***************
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*** 26,30 ****
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looks for to find the patch level (for the sccs version string). */
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! #define PATCHLEVEL 43
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#endif /* _PATCHLEVEL_H_ */
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--- 26,30 ----
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looks for to find the patch level (for the sccs version string). */
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! #define PATCHLEVEL 44
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#endif /* _PATCHLEVEL_H_ */
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