check for invalid utf-8, and toss it back to avoid crashes

[ikiwiki.git] / doc / security.mdwn

diff --git a/doc/security.mdwn b/doc/security.mdwn
index 0841abf495a3d62580bfa849bbc8bafe13d58497..1bc7b9e60a6c626826403bb2d4a12368992e7de2 100644 (file)
--- a/doc/security.mdwn
+++ b/doc/security.mdwn
@@ -407,3 +407,12 @@ discovered on 30 May 2008 and fixed the same day. ([[!cve CVE-2008-0169]])
 
 I recommend upgrading to 2.48 immediatly if your wiki allows both password
 and openid logins.
+
+## Malformed UTF-8 DOS
+
+Feeding ikiwiki page sources containing certian forms of malformed UTF-8
+can cause it to crash. This can potentially be used for a denial of service
+attack.
+
+intrigeri discovered this problem on 12 Nov 2008 and a patch put in place
+later that day.