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Red Hat Bugzilla – Attachment 671186 Details for
Bug 885893
CVE-2012-6303 tcl-snack: multiple buffer overflows
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[patch]
Proposed patch by Michael Karcher to fix CVE-2012-6303
CVE-2012-6303.patch (text/plain), 688 bytes, created by
John Paul Adrian Glaubitz
on 2013-01-02 00:22:44 UTC
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Description:
Proposed patch by Michael Karcher to fix CVE-2012-6303
Filename:
MIME Type:
Creator:
John Paul Adrian Glaubitz
Created:
2013-01-02 00:22:44 UTC
Size:
688 bytes
patch
obsolete
>--- snack-2.2.10-dfsg1/generic/jkSoundFile.c 2005-12-14 12:29:38.000000000 +0100 >+++ snack-2.2.10-dfsg1+karcher/generic/jkSoundFile.c 2013-01-02 00:29:56.836287036 +0100 >@@ -1796,7 +1796,14 @@ > GetHeaderBytes(Sound *s, Tcl_Interp *interp, Tcl_Channel ch, char *buf, > int len) > { >- int rlen = Tcl_Read(ch, &buf[s->firstNRead], len - s->firstNRead); >+ int rlen; >+ >+ if (len > max(CHANNEL_HEADER_BUFFER, HEADBUF)){ >+ Tcl_AppendResult(interp, "Excessive header size", NULL); >+ return TCL_ERROR; >+ } >+ >+ rlen = Tcl_Read(ch, &buf[s->firstNRead], len - s->firstNRead); > > if (rlen < len - s->firstNRead){ > Tcl_AppendResult(interp, "Failed reading header bytes", NULL);
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