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73 lines
2.9 KiB
Diff
73 lines
2.9 KiB
Diff
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Fix CVE-2016-8863:
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https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8863
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https://sourceforge.net/p/pupnp/bugs/133/
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Patch copied from upstream source repository:
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https://sourceforge.net/p/pupnp/code/ci/9c099c2923ab4d98530ab5204af1738be5bddba7/
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From 9c099c2923ab4d98530ab5204af1738be5bddba7 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= <ukleinek@debian.org>
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Date: Thu, 8 Dec 2016 17:11:53 +0100
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Subject: [PATCH] Fix out-of-bound access in create_url_list() (CVE-2016-8863)
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If there is an invalid URL in URLS->buf after a valid one, uri_parse is
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called with out pointing after the allocated memory. As uri_parse writes
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to *out before returning an error the loop in create_url_list must be
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stopped early to prevent an out-of-bound access
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Bug: https://sourceforge.net/p/pupnp/bugs/133/
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Bug-CVE: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-8863
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Bug-Debian: https://bugs.debian.org/842093
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Bug-Redhat: https://bugzilla.redhat.com/show_bug.cgi?id=1388771
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(cherry picked from commit a0f6e719bc03c4d2fe6a4a42ef6b8761446f520b)
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---
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upnp/src/gena/gena_device.c | 17 ++++++++++++-----
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1 file changed, 12 insertions(+), 5 deletions(-)
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diff --git a/upnp/src/gena/gena_device.c b/upnp/src/gena/gena_device.c
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index fb04a29..245c56b 100644
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--- a/upnp/src/gena/gena_device.c
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+++ b/upnp/src/gena/gena_device.c
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@@ -1113,7 +1113,7 @@ static int create_url_list(
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/*! [out] . */
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URL_list *out)
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{
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- size_t URLcount = 0;
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+ size_t URLcount = 0, URLcount2 = 0;
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size_t i;
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int return_code = 0;
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uri_type temp;
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@@ -1155,16 +1155,23 @@ static int create_url_list(
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}
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memcpy( out->URLs, URLS->buff, URLS->size );
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out->URLs[URLS->size] = 0;
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- URLcount = 0;
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for( i = 0; i < URLS->size; i++ ) {
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if( ( URLS->buff[i] == '<' ) && ( i + 1 < URLS->size ) ) {
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if( ( ( return_code =
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parse_uri( &out->URLs[i + 1], URLS->size - i + 1,
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- &out->parsedURLs[URLcount] ) ) ==
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+ &out->parsedURLs[URLcount2] ) ) ==
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HTTP_SUCCESS )
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- && ( out->parsedURLs[URLcount].hostport.text.size !=
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+ && ( out->parsedURLs[URLcount2].hostport.text.size !=
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0 ) ) {
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- URLcount++;
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+ URLcount2++;
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+ if (URLcount2 >= URLcount)
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+ /*
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+ * break early here in case there is a bogus URL that
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+ * was skipped above. This prevents to access
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+ * out->parsedURLs[URLcount] which is beyond the
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+ * allocation.
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+ */
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+ break;
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} else {
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if( return_code == UPNP_E_OUTOF_MEMORY ) {
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free( out->URLs );
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--
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2.11.0
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