From b3e2318ff3cbe4a9babe5b6875916a429bd584be Mon Sep 17 00:00:00 2001 From: Daniel Stenberg Date: Wed, 10 Dec 2025 11:40:47 +0100 Subject: [PATCH] curl_sasl: if redirected, require permission to use bearer Closes #19933 CVE: CVE-2025-14524 Upstream-Status: Backport [https://github.com/curl/curl/commit/1a822275d333dc6da6043497160fd04c8fa48640] Signed-off-by: Amaury Couderc --- lib/curl_sasl.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/lib/curl_sasl.c b/lib/curl_sasl.c index 7e28c92..f0b0341 100644 --- a/lib/curl_sasl.c +++ b/lib/curl_sasl.c @@ -345,7 +345,9 @@ CURLcode Curl_sasl_start(struct SASL *sasl, struct Curl_easy *data, data->set.str[STRING_SERVICE_NAME] : sasl->params->service; #endif - const char *oauth_bearer = data->set.str[STRING_BEARER]; + const char *oauth_bearer = + (!data->state.this_is_a_follow || data->set.allow_auth_to_other_hosts) ? + data->set.str[STRING_BEARER] : NULL; struct bufref nullmsg; Curl_bufref_init(&nullmsg); @@ -531,7 +533,9 @@ CURLcode Curl_sasl_continue(struct SASL *sasl, struct Curl_easy *data, data->set.str[STRING_SERVICE_NAME] : sasl->params->service; #endif - const char *oauth_bearer = data->set.str[STRING_BEARER]; + const char *oauth_bearer = + (!data->state.this_is_a_follow || data->set.allow_auth_to_other_hosts) ? + data->set.str[STRING_BEARER] : NULL; struct bufref serverdata; Curl_bufref_init(&serverdata);