Date: Thu, 5 Nov 2015 16:08:38 +0000 (UTC) From: Maksim Yevmenkin <emax@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r290395 - stable/10/usr.sbin/bluetooth/sdpcontrol Message-ID: <201511051608.tA5G8ceM042230@repo.freebsd.org>
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Author: emax Date: Thu Nov 5 16:08:38 2015 New Revision: 290395 URL: https://svnweb.freebsd.org/changeset/base/290395 Log: MFC r289637 check boundaries while parsing SDP responses Reported by: hps Reviewed by: hps Modified: stable/10/usr.sbin/bluetooth/sdpcontrol/search.c Directory Properties: stable/10/ (props changed) Modified: stable/10/usr.sbin/bluetooth/sdpcontrol/search.c ============================================================================== --- stable/10/usr.sbin/bluetooth/sdpcontrol/search.c Thu Nov 5 14:55:58 2015 (r290394) +++ stable/10/usr.sbin/bluetooth/sdpcontrol/search.c Thu Nov 5 16:08:38 2015 (r290395) @@ -102,6 +102,12 @@ print_service_class_id_list(uint8_t cons /* NOT REACHED */ } + if (len > (end - start)) { + fprintf(stderr, "Invalid Service Class ID List. " \ + "Too long len=%d\n", len); + return; + } + while (start < end) { SDP_GET8(type, start); switch (type) { @@ -258,28 +264,31 @@ print_protocol_descriptor(uint8_t const case SDP_DATA_STR8: case SDP_DATA_URL8: SDP_GET8(len, start); - fprintf(stdout, "%*.*s\n", len, len, (char *) start); - start += len; + for (; start < end && len > 0; start ++, len --) + fprintf(stdout, "%c", *start); + fprintf(stdout, "\n"); break; case SDP_DATA_STR16: case SDP_DATA_URL16: SDP_GET16(len, start); - fprintf(stdout, "%*.*s\n", len, len, (char *) start); - start += len; + for (; start < end && len > 0; start ++, len --) + fprintf(stdout, "%c", *start); + fprintf(stdout, "\n"); break; case SDP_DATA_STR32: case SDP_DATA_URL32: SDP_GET32(len, start); - fprintf(stdout, "%*.*s\n", len, len, (char *) start); - start += len; + for (; start < end && len > 0; start ++, len --) + fprintf(stdout, "%c", *start); + fprintf(stdout, "\n"); break; case SDP_DATA_SEQ8: case SDP_DATA_ALT8: SDP_GET8(len, start); - for (; len > 0; start ++, len --) + for (; start < end && len > 0; start ++, len --) fprintf(stdout, "%#2.2x ", *start); fprintf(stdout, "\n"); break; @@ -287,7 +296,7 @@ print_protocol_descriptor(uint8_t const case SDP_DATA_SEQ16: case SDP_DATA_ALT16: SDP_GET16(len, start); - for (; len > 0; start ++, len --) + for (; start < end && len > 0; start ++, len --) fprintf(stdout, "%#2.2x ", *start); fprintf(stdout, "\n"); break; @@ -295,7 +304,7 @@ print_protocol_descriptor(uint8_t const case SDP_DATA_SEQ32: case SDP_DATA_ALT32: SDP_GET32(len, start); - for (; len > 0; start ++, len --) + for (; start < end && len > 0; start ++, len --) fprintf(stdout, "%#2.2x ", *start); fprintf(stdout, "\n"); break; @@ -341,6 +350,12 @@ print_protocol_descriptor_list(uint8_t c /* NOT REACHED */ } + if (len > (end - start)) { + fprintf(stderr, "Invalid Protocol Descriptor List. " \ + "Too long, len=%d\n", len); + return; + } + while (start < end) { SDP_GET8(type, start); switch (type) { @@ -363,6 +378,12 @@ print_protocol_descriptor_list(uint8_t c /* NOT REACHED */ } + if (len > (end - start)) { + fprintf(stderr, "Invalid Protocol Descriptor List. " \ + "Too long, len=%d\n", len); + return; + } + print_protocol_descriptor(start, start + len); start += len; } @@ -415,6 +436,12 @@ print_bluetooth_profile_descriptor_list( /* NOT REACHED */ } + if (len > (end - start)) { + fprintf(stderr, "Invalid Bluetooth Profile Descriptor List. " \ + "Too long, len=%d\n", len); + return; + } + while (start < end) { SDP_GET8(type, start); switch (type) { @@ -438,6 +465,13 @@ print_bluetooth_profile_descriptor_list( /* NOT REACHED */ } + if (len > (end - start)) { + fprintf(stderr, "Invalid Bluetooth Profile " \ + "Descriptor List. " \ + "Too long, len=%d\n", len); + return; + } + /* Get UUID */ SDP_GET8(type, start); switch (type) {
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