Add some more reasoning. Split out unrelated issue.

[ikiwiki.git] / doc / security.mdwn

diff --git a/doc/security.mdwn b/doc/security.mdwn
index 0841abf495a3d62580bfa849bbc8bafe13d58497..3924186c2120c9371b1f55b648c4a760a0a5d6d3 100644 (file)
--- a/doc/security.mdwn
+++ b/doc/security.mdwn
@@ -407,3 +407,23 @@ 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, in version 2.70. The fix was backported to testing as version
+2.53.3, and to stable as version 1.33.7.
+
+## Insufficient blacklisting in teximg plugin
+
+Josh Triplett discovered on 28 Aug 2009 that the teximg plugin's
+blacklisting of insecure TeX commands was insufficient; it could be
+bypassed and used to read arbitrary files. This was fixed by
+enabling TeX configuration options that disallow unsafe TeX commands.
+The fix was released on 30 Aug 2009 in version 3.1415926, and was
+backported to stable in version 2.53.4. If you use the teximg plugin,
+I recommend upgrading. ([[!cve CVE-2009-2944]])