56 lines
2.1 KiB
Diff
56 lines
2.1 KiB
Diff
Fix CVE-2017-8798.
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https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-8798
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http://seclists.org/oss-sec/2017/q2/247
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Patch copied from upstream source repository, with Changelog entry removed:
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https://github.com/miniupnp/miniupnp/commit/f0f1f4b22d6a98536377a1bb07e7c20e4703d229
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diff --git a/miniwget.c b/miniwget.c
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index 37cb47b..1eda57c 100644
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--- a/miniwget.c
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+++ b/miniwget.c
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@@ -284,11 +284,12 @@ getHTTPResponse(int s, int * size, int * status_code)
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goto end_of_stream;
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}
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}
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- bytestocopy = ((int)chunksize < (n - i))?chunksize:(unsigned int)(n - i);
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+ /* it is guaranteed that (n >= i) */
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+ bytestocopy = (chunksize < (unsigned int)(n - i))?chunksize:(unsigned int)(n - i);
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if((content_buf_used + bytestocopy) > content_buf_len)
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{
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char * tmp;
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- if(content_length >= (int)(content_buf_used + bytestocopy)) {
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+ if((content_length >= 0) && ((unsigned int)content_length >= (content_buf_used + bytestocopy))) {
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content_buf_len = content_length;
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} else {
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content_buf_len = content_buf_used + bytestocopy;
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@@ -313,14 +314,15 @@ getHTTPResponse(int s, int * size, int * status_code)
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{
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/* not chunked */
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if(content_length > 0
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- && (int)(content_buf_used + n) > content_length) {
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+ && (content_buf_used + n) > (unsigned int)content_length) {
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/* skipping additional bytes */
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n = content_length - content_buf_used;
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}
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if(content_buf_used + n > content_buf_len)
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{
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char * tmp;
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- if(content_length >= (int)(content_buf_used + n)) {
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+ if(content_length >= 0
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+ && (unsigned int)content_length >= (content_buf_used + n)) {
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content_buf_len = content_length;
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} else {
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content_buf_len = content_buf_used + n;
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@@ -340,7 +342,7 @@ getHTTPResponse(int s, int * size, int * status_code)
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}
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}
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/* use the Content-Length header value if available */
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- if(content_length > 0 && (int)content_buf_used >= content_length)
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+ if(content_length > 0 && content_buf_used >= (unsigned int)content_length)
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{
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#ifdef DEBUG
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printf("End of HTTP content\n");
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