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authorDaniel Stenberg <daniel@haxx.se>2017-10-08 17:15:44 +0200
committerDaniel Stenberg <daniel@haxx.se>2017-10-09 00:41:48 +0200
commit232dffcf2422baefa66617fdae2fb20085a8e386 (patch)
tree7c066be3e8b10c7cf9167617ac9b66e7feffaf65
parenteb04636d68b078ac86558147ca124676f32dc285 (diff)
RTSP: avoid integer overflow on funny RTSP response
... like a very large non-existing RTSP version number. Added test 577 to verify. Detected by OSS-fuzz. Closes #1969
-rw-r--r--lib/http.c6
-rw-r--r--tests/data/Makefile.inc2
-rw-r--r--tests/data/test57755
3 files changed, 60 insertions, 3 deletions
diff --git a/lib/http.c b/lib/http.c
index 38227eb6c..b3978af42 100644
--- a/lib/http.c
+++ b/lib/http.c
@@ -3387,12 +3387,14 @@ CURLcode Curl_http_readwrite_headers(struct Curl_easy *data,
}
}
else if(conn->handler->protocol & CURLPROTO_RTSP) {
+ char separator;
nc = sscanf(HEADER1,
- " RTSP/%d.%d %3d",
+ " RTSP/%1d.%1d%c%3d",
&rtspversion_major,
&conn->rtspversion,
+ &separator,
&k->httpcode);
- if(nc == 3) {
+ if((nc == 4) && (' ' == separator)) {
conn->rtspversion += 10 * rtspversion_major;
conn->httpversion = 11; /* For us, RTSP acts like HTTP 1.1 */
}
diff --git a/tests/data/Makefile.inc b/tests/data/Makefile.inc
index 74fdc37fa..caf7314de 100644
--- a/tests/data/Makefile.inc
+++ b/tests/data/Makefile.inc
@@ -70,7 +70,7 @@ test536 test537 test538 test539 test540 test541 test542 test543 test544 \
test545 test546 test547 test548 test549 test550 test551 test552 test553 \
test554 test555 test556 test557 test558 test559 test560 test561 test562 \
test563 test564 test565 test566 test567 test568 test569 test570 test571 \
-test572 test573 test574 test575 test576 test578 test579 test580 \
+test572 test573 test574 test575 test576 test577 test578 test579 test580 \
test581 test582 test583 test584 test585 test586 test587 test588 test589 \
test590 test591 test592 test593 test594 test595 test596 test597 test598 \
test599 test600 test601 test602 test603 test604 test605 test606 test607 \
diff --git a/tests/data/test577 b/tests/data/test577
new file mode 100644
index 000000000..525549264
--- /dev/null
+++ b/tests/data/test577
@@ -0,0 +1,55 @@
+<testcase>
+
+#Informational
+<info>
+<keywords>
+RTSP
+OPTIONS
+</keywords>
+</info>
+
+# Server-side
+<reply>
+<data>
+RTSP/1.1234567 200 OK
+Server: RTSPD/libcurl-test
+CSeq: 1
+Public: DESCRIBE, OPTIONS, SETUP, TEARDOWN, PLAY, PAUSE
+Curl-Private: swsclose
+</data>
+<datacheck>
+</datacheck>
+</reply>
+
+# Client-Side
+<client>
+<server>
+rtsp
+</server>
+<tool>
+lib567
+</tool>
+
+<name>
+Funny RTSP version in response
+</name>
+<command>
+rtsp://%HOSTIP:%RTSPPORT/577
+</command>
+</client>
+
+<verify>
+<protocol>
+OPTIONS rtsp://%HOSTIP:%RTSPPORT/577 RTSP/1.0
+CSeq: 1
+User-Agent: test567
+Test-Number: 567
+
+</protocol>
+# 8 == CURLE_WEIRD_SERVER_REPLY
+<errorcode>
+8
+</errorcode>
+</verify>
+
+</testcase>