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From: "Anthony J. Bentley" <>
To: Ingo Schwarze <>
Subject: Re: Content-Security-Policy for man.cgi
Date: Sun, 10 Nov 2019 13:09:05 -0700	[thread overview]
Message-ID: <1076-1573416545.590100@piVC.Y-1h.zrhB> (raw)
In-Reply-To: <>

Hi Ingo,

Ingo Schwarze writes:
> > It might be worth replacing these with stylesheet references for the
> > sake of having a CSP strict enough to prevent malicious inline CSS in
> > the manual body. But if not, we'll have to broaden the policy. Even a
> > broad CSS policy is better because we still completely block JavaScript.
> I think completely getting rid of style= isn't that hard, but i won't
> work too much on mandoc during a ports hackathon - so i have taken
> a TODO note for now (see below).

Then here's the new diff. (I removed the space after the semicolon
as it's optional.)

Index: cgi.c
RCS file: /cvs/src/usr.bin/mandoc/cgi.c,v
retrieving revision 1.106
diff -u -p -r1.106 cgi.c
--- cgi.c	1 Oct 2019 17:54:04 -0000	1.106
+++ cgi.c	10 Nov 2019 20:07:39 -0000
@@ -336,6 +336,8 @@ resp_begin_http(int code, const char *ms
 	printf("Content-Type: text/html; charset=utf-8\r\n"
 	     "Cache-Control: no-cache\r\n"
+	     "Content-Security-Policy: default-src 'none';"
+	     "style-src 'self' 'unsafe-inline'\r\n"
 	     "Pragma: no-cache\r\n"
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  reply	other threads:[~2019-11-10 20:09 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-10  8:59 Anthony J. Bentley
2019-11-10 10:22 ` Ingo Schwarze
2019-11-10 13:02   ` Anthony J. Bentley
2019-11-10 17:47     ` Ingo Schwarze
2019-11-10 20:09       ` Anthony J. Bentley [this message]
2019-11-10 20:57         ` Ingo Schwarze

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