/ 
Plack-1.0017-TRIAL
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/ Plack::Middleware::IIS7KeepAliveFix
Security Advisories (3)
CPANSA-Plack-2015-0202 (2015-02-02)

Fixed a possible directory traversal with Plack::App::File on Win32.

CPANSA-Plack-2014-0801 (2014-08-01)

Plack::App::File would previously strip trailing slashes off provided paths. This in combination with the common pattern of serving files with Plack::Middleware::Static could allow an attacker to bypass a whitelist of generated files

CVE-2026-7381 (2026-04-29)

Plack::Middleware::XSendfile versions through 1.0053 for Perl can allow client-controlled path rewriting. Plack::Middleware::XSendfile allows the variation setting (sendfile type) to be set by the client via the X-Sendfile-Type header, if it is not considered in the middleware constructor or the Plack environment. A malicious client can set the X-Sendfile-Type header to "X-Accel-Redirect" to services running behind nginx reverse proxies, and then set the X-Accel-Mapping to map the path to an arbitrary file on the server. Since 1.0053, Plack::Middleware::XSendfile is deprecated and will be removed from future releases of Plack. This is similar to CVE-2025-61780 for Rack::Sendfile, although Plack::Middleware::XSendfile has some mitigations that disallow regular expressions to be used in the mapping, and only apply the mapping for the "X-Accel-Redirect" type.

NAME

Plack::Middleware::IIS7KeepAliveFix - fixes buffer being cut off on redirect when keep-alive is active on IIS.

SYNOPSIS

# in your app.psgi
use Plack::Builder;

builder {
  enable "IIS7KeepAliveFix";
  $app;
};

# Or from the command line
plackup -s FCGI -e 'enable "IIS7KeepAliveFix"' /path/to/app.psgi

DESCRIPTION

This middleware fixes buffer being cut off on redirect when keep-alive is active on IIS7.

AUTHORS

KnowZeroX