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Fix CVE-2017-7375:
https://bugzilla.gnome.org/show_bug.cgi?id=780691 (not yet public)
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-7375
https://security-tracker.debian.org/tracker/CVE-2017-7375
Patch copied from upstream source repository:
https://git.gnome.org/browse/libxml2/commit/?id=90ccb58242866b0ba3edbef8fe44214a101c2b3e
From 90ccb58242866b0ba3edbef8fe44214a101c2b3e Mon Sep 17 00:00:00 2001
From: Neel Mehta <nmehta@google.com>
Date: Fri, 7 Apr 2017 17:43:02 +0200
Subject: [PATCH] Prevent unwanted external entity reference
For https://bugzilla.gnome.org/show_bug.cgi?id=780691
* parser.c: add a specific check to avoid PE reference
---
parser.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/parser.c b/parser.c
index 609a2703..c2c812de 100644
--- a/parser.c
+++ b/parser.c
@@ -8123,6 +8123,15 @@ xmlParsePEReference(xmlParserCtxtPtr ctxt)
if (xmlPushInput(ctxt, input) < 0)
return;
} else {
+ if ((entity->etype == XML_EXTERNAL_PARAMETER_ENTITY) &&
+ ((ctxt->options & XML_PARSE_NOENT) == 0) &&
+ ((ctxt->options & XML_PARSE_DTDVALID) == 0) &&
+ ((ctxt->options & XML_PARSE_DTDLOAD) == 0) &&
+ ((ctxt->options & XML_PARSE_DTDATTR) == 0) &&
+ (ctxt->replaceEntities == 0) &&
+ (ctxt->validate == 0))
+ return;
+
/*
* TODO !!!
* handle the extra spaces added before and after
--
2.14.1
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