1 files changed, 59 insertions, 0 deletions

diff --git a/meta/recipes-support/curl/curl/CVE-2021-22876.patch b/meta/recipes-support/curl/curl/CVE-2021-22876.patch
new file mode 100644
index 0000000000..fc396aabef
--- /dev/null
+++ b/meta/recipes-support/curl/curl/CVE-2021-22876.patch
@@ -0,0 +1,59 @@
+transfer: strip credentials from the auto-referer header field
+
+CVE-2021-22876
+
+Patch taken from Ubuntu curl 7.68.0-1ubuntu2.5.
+
+Bug: https://curl.se/docs/CVE-2021-22876.html
+Upstream-Status: backport
+---
+ lib/transfer.c | 25 +++++++++++++++++++++++--
+ 1 file changed, 23 insertions(+), 2 deletions(-)
+
+diff --git a/lib/transfer.c b/lib/transfer.c
+index e76834eb3..744e1c00b 100644
+--- a/lib/transfer.c
++++ b/lib/transfer.c
+@@ -1570,6 +1570,9 @@ CURLcode Curl_follow(struct Curl_easy *data,
+       data->set.followlocation++; /* count location-followers */
+ 
+       if(data->set.http_auto_referer) {
++        CURLU *u;
++        char *referer;
++
+         /* We are asked to automatically set the previous URL as the referer
+            when we get the next URL. We pick the ->url field, which may or may
+            not be 100% correct */
+@@ -1579,9 +1582,27 @@ CURLcode Curl_follow(struct Curl_easy *data,
+           data->change.referer_alloc = FALSE;
+         }
+ 
+-        data->change.referer = strdup(data->change.url);
+-        if(!data->change.referer)
++        /* Make a copy of the URL without crenditals and fragment */
++        u = curl_url();
++        if(!u)
++          return CURLE_OUT_OF_MEMORY;
++
++        uc = curl_url_set(u, CURLUPART_URL, data->change.url, 0);
++        if(!uc)
++          uc = curl_url_set(u, CURLUPART_FRAGMENT, NULL, 0);
++        if(!uc)
++          uc = curl_url_set(u, CURLUPART_USER, NULL, 0);
++        if(!uc)
++          uc = curl_url_set(u, CURLUPART_PASSWORD, NULL, 0);
++        if(!uc)
++          uc = curl_url_get(u, CURLUPART_URL, &referer, 0);
++
++        curl_url_cleanup(u);
++
++        if(uc || referer == NULL)
+           return CURLE_OUT_OF_MEMORY;
++
++        data->change.referer = referer;
+         data->change.referer_alloc = TRUE; /* yes, free this later */
+       }
+     }
+-- 
+2.20.1
+