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Sebastian Kemper
7d2337a17f
- Add patches copied from Debian to address open CVEs - Update mail address of maintainer - Fix a typo - Add --disable-silent-rules for verbose build output Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>
37 lines
1.1 KiB
Diff
37 lines
1.1 KiB
Diff
From 87c3d9ea214fc0503fd8130b6dd97431d69cc066 Mon Sep 17 00:00:00 2001
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From: Nick Wellnhofer <wellnhofer@aevum.de>
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Date: Thu, 5 May 2016 15:12:48 +0200
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Subject: [PATCH] Fix OOB heap read in xsltExtModuleRegisterDynamic
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xsltExtModuleRegisterDynamic would read a byte before the start of a
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string under certain circumstances. I looks like this piece code was
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supposed to strip characters from the end of the extension name, but
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it didn't have any effect. Don't read beyond the beginning of the
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string and actually strip unwanted characters.
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Found with afl-fuzz and ASan.
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---
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libxslt/extensions.c | 5 ++++-
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1 file changed, 4 insertions(+), 1 deletion(-)
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diff --git a/libxslt/extensions.c b/libxslt/extensions.c
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index 5ad73cb..ae6eef0 100644
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--- a/libxslt/extensions.c
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+++ b/libxslt/extensions.c
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@@ -367,8 +367,11 @@ xsltExtModuleRegisterDynamic(const xmlChar * URI)
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i++;
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}
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- if (*(i - 1) == '_')
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+ /* Strip underscores from end of string. */
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+ while (i > ext_name && *(i - 1) == '_') {
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+ i--;
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*i = '\0';
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+ }
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/* determine module directory */
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ext_directory = (xmlChar *) getenv("LIBXSLT_PLUGINS_PATH");
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--
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2.8.1
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