1 files changed, 82 insertions, 0 deletions
diff --git a/backport-CVE-2024-9681.patch b/backport-CVE-2024-9681.patch
new file mode 100644
index 0000000..6b5abae
--- /dev/null
+++ b/backport-CVE-2024-9681.patch
@@ -0,0 +1,82 @@
+From a94973805df96269bf3f3bf0a20ccb9887313316 Mon Sep 17 00:00:00 2001
+From: Daniel Stenberg <daniel@haxx.se>
+Date: Wed, 9 Oct 2024 10:04:35 +0200
+Subject: [PATCH] hsts: improve subdomain handling
+
+- on load, only replace existing HSTS entries if there is a full host
+  match
+
+- on matching, prefer a full host match and secondary the longest tail
+  subdomain match
+
+Closes #15210
+Conflict:Context adapt
+Reference:https://github.com/curl/curl/commit/a94973805df96269bf3f3bf0a20ccb9887313316
+---
+ lib/hsts.c          | 14 ++++++++++----
+ tests/data/test1660 |  2 +-
+ 2 files changed, 11 insertions(+), 5 deletions(-)
+
+diff --git a/lib/hsts.c b/lib/hsts.c
+index d5e883f51ef0f7..12052ce53c1c5a 100644
+--- a/lib/hsts.c
++++ b/lib/hsts.c
+@@ -249,11 +249,13 @@ CURLcode Curl_hsts_parse(struct hsts *h, const char *hostname,
+ struct stsentry *Curl_hsts(struct hsts *h, const char *hostname,
+                            bool subdomain)
+ {
++  struct stsentry *bestsub = NULL;
+   if(h) {
+     time_t now = time(NULL);
+     size_t hlen = strlen(hostname);
+     struct Curl_llist_element *e;
+     struct Curl_llist_element *n;
++    size_t blen = 0;
+ 
+     if((hlen > MAX_HSTS_HOSTLEN) || !hlen)
+       return NULL;
+@@ -275,15 +277,19 @@ struct stsentry *Curl_hsts(struct hsts *h, const char *hostname,
+       if((subdomain && sts->includeSubDomains) && (ntail < hlen)) {
+         size_t offs = hlen - ntail;
+         if((hostname[offs-1] == '.') &&
+-           strncasecompare(&hostname[offs], sts->host, ntail))
+-          return sts;
++           strncasecompare(&hostname[offs], sts->host, ntail) &&
++           (ntail > blen)) {
++          /* save the tail match with the longest tail */
++          bestsub = sts;
++          blen = ntail;
++        }
+       }
+       /* avoid strcasecompare because the host name is not null terminated */
+       if((hlen == ntail) && strncasecompare(hostname, sts->host, hlen))
+         return sts;
+     }
+   }
+-  return NULL; /* no match */
++  return bestsub;
+ }
+ 
+ /*
+@@ -435,7 +441,7 @@ static CURLcode hsts_add(struct hsts *h, char *line)
+     e = Curl_hsts(h, p, subdomain);
+     if(!e)
+       result = hsts_create(h, p, subdomain, expires);
+-    else {
++    else if(strcasecompare(p, e->host)) {
+       /* the same host name, use the largest expire time */
+       if(expires > e->expires)
+         e->expires = expires;
+diff --git a/tests/data/test1660 b/tests/data/test1660
+index f86126d19cf269..4b6f9615c9d517 100644
+--- a/tests/data/test1660
++++ b/tests/data/test1660
+@@ -52,7 +52,7 @@ this.example [this.example]: 1548400797
+ Input 12: error 43
+ Input 13: error 43
+ Input 14: error 43
+-3.example.com [example.com]: 1569905261 includeSubDomains
++3.example.com [3.example.com]: 1569905261 includeSubDomains
+ 3.example.com [example.com]: 1569905261 includeSubDomains
+ foo.example.com [example.com]: 1569905261 includeSubDomains
+ 'foo.xample.com' is not HSTS