forked from mirrors/nixpkgs
26 lines
1,002 B
Diff
26 lines
1,002 B
Diff
From 39ce47f219b09c380b81f89fe54ac586c8db6bde Mon Sep 17 00:00:00 2001
|
|
From: Harry Sintonen <sintonen@iki.fi>
|
|
Date: Fri, 7 May 2021 13:09:57 +0200
|
|
Subject: [PATCH] telnet: check sscanf() for correct number of matches
|
|
|
|
CVE-2021-22898
|
|
|
|
Bug: https://curl.se/docs/CVE-2021-22898.html
|
|
---
|
|
lib/telnet.c | 2 +-
|
|
1 file changed, 1 insertion(+), 1 deletion(-)
|
|
|
|
diff --git a/lib/telnet.c b/lib/telnet.c
|
|
index 26e0658ba9cc..fdd137fb0c04 100644
|
|
--- a/lib/telnet.c
|
|
+++ b/lib/telnet.c
|
|
@@ -922,7 +922,7 @@ static void suboption(struct Curl_easy *data)
|
|
size_t tmplen = (strlen(v->data) + 1);
|
|
/* Add the variable only if it fits */
|
|
if(len + tmplen < (int)sizeof(temp)-6) {
|
|
- if(sscanf(v->data, "%127[^,],%127s", varname, varval)) {
|
|
+ if(sscanf(v->data, "%127[^,],%127s", varname, varval) == 2) {
|
|
msnprintf((char *)&temp[len], sizeof(temp) - len,
|
|
"%c%s%c%s", CURL_NEW_ENV_VAR, varname,
|
|
CURL_NEW_ENV_VALUE, varval);
|