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4028361d5c
Signed-off-by: Lukas Schmelting <lschmelting@posteo.com> Part-of: https://github.com/gentoo/gentoo/pull/43063 Signed-off-by: Sam James <sam@gentoo.org>
70 lines
2.3 KiB
Diff
70 lines
2.3 KiB
Diff
From 62048278a4c5fdf14d287dfb400005c0a0caa69f Mon Sep 17 00:00:00 2001
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From: Michael Mann <mmann78@netscape.net>
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Date: Sat, 21 Jun 2025 12:11:30 -0400
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Subject: [PATCH] [CVE-2025-49795] schematron: Fix null pointer dereference
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leading to DoS
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Fixes #932
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---
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result/schematron/zvon16_0.err | 3 +++
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schematron.c | 5 +++++
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test/schematron/zvon16.sct | 7 +++++++
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test/schematron/zvon16_0.xml | 5 +++++
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4 files changed, 20 insertions(+)
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create mode 100644 result/schematron/zvon16_0.err
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create mode 100644 test/schematron/zvon16.sct
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create mode 100644 test/schematron/zvon16_0.xml
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diff --git a/result/schematron/zvon16_0.err b/result/schematron/zvon16_0.err
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new file mode 100644
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index 00000000..3d052409
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--- /dev/null
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+++ b/result/schematron/zvon16_0.err
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@@ -0,0 +1,3 @@
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+XPath error : Unregistered function
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+./test/schematron/zvon16_0.xml:2: element book: schematron error : /library/book line 2: Book
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+./test/schematron/zvon16_0.xml fails to validate
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diff --git a/schematron.c b/schematron.c
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index 1de25deb..da603402 100644
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--- a/schematron.c
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+++ b/schematron.c
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@@ -1506,6 +1506,11 @@ xmlSchematronFormatReport(xmlSchematronValidCtxtPtr ctxt,
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select = xmlGetNoNsProp(child, BAD_CAST "select");
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comp = xmlXPathCtxtCompile(ctxt->xctxt, select);
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eval = xmlXPathCompiledEval(comp, ctxt->xctxt);
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+ if (eval == NULL) {
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+ xmlXPathFreeCompExpr(comp);
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+ xmlFree(select);
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+ return ret;
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+ }
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switch (eval->type) {
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case XPATH_NODESET: {
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diff --git a/test/schematron/zvon16.sct b/test/schematron/zvon16.sct
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new file mode 100644
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index 00000000..f03848aa
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--- /dev/null
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+++ b/test/schematron/zvon16.sct
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@@ -0,0 +1,7 @@
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+<sch:schema xmlns:sch="http://purl.oclc.org/dsdl/schematron">
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+ <sch:pattern id="TestPattern">
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+ <sch:rule context="book">
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+ <sch:report test="not(@available)">Book <sch:value-of select="falae()"/> test</sch:report>
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+ </sch:rule>
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+ </sch:pattern>
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+</sch:schema>
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diff --git a/test/schematron/zvon16_0.xml b/test/schematron/zvon16_0.xml
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new file mode 100644
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index 00000000..551e2d65
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--- /dev/null
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+++ b/test/schematron/zvon16_0.xml
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@@ -0,0 +1,5 @@
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+<library>
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+ <book title="Test Book" id="bk101">
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+ <author>Test Author</author>
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+ </book>
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+</library>
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--
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2.49.1
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