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-rw-r--r--lib/vauth/cleartext.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/vauth/cleartext.c b/lib/vauth/cleartext.c
index 6f452c169..001f6ea9a 100644
--- a/lib/vauth/cleartext.c
+++ b/lib/vauth/cleartext.c
@@ -81,7 +81,8 @@ CURLcode Curl_auth_create_plain_message(struct Curl_easy *data,
plen = strlen(passwd);
/* Compute binary message length. Check for overflows. */
- if(((zlen + clen) > SIZE_T_MAX/4) || (plen > (SIZE_T_MAX/2 - 2)))
+ if((zlen > SIZE_T_MAX/4) || (clen > SIZE_T_MAX/4) ||
+ (plen > (SIZE_T_MAX/2 - 2)))
return CURLE_OUT_OF_MEMORY;
plainlen = zlen + clen + plen + 2;