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b28f9363c5
Fixes the following vulnerabilities:
- CVE-2018-6952:
A double free exists in the another_hunk function in pch.c in GNU
patch through 2.7.6.
For more information, see:
- https://www.cve.org/CVERecord?id=CVE-2018-6952
- https://cgit.git.savannah.gnu.org/cgit/patch.git/commit/?id=9c986353e420ead6e706262bf204d6e03322c300
- CVE-2019-20633:
GNU patch through 2.7.6 contains a free(p_line[p_end]) Double Free
vulnerability in the function another_hunk in pch.c that can cause a
denial of service via a crafted patch file. NOTE: this issue exists
because of an incomplete fix for CVE-2018-6952.
For more information, see:
- https://www.cve.org/CVERecord?id=CVE-2019-20633
- https://cgit.git.savannah.gnu.org/cgit/patch.git/commit/?id=15b158db3ae11cb835f2eb8d2eb48e09d1a4af48
Signed-off-by: Thomas Perale <thomas.perale@mind.be>
Signed-off-by: Julien Olivain <ju.o@free.fr>
31 lines
907 B
Diff
31 lines
907 B
Diff
From 15b158db3ae11cb835f2eb8d2eb48e09d1a4af48 Mon Sep 17 00:00:00 2001
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From: Andreas Gruenbacher <agruen@gnu.org>
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Date: Mon, 15 Jul 2019 19:10:02 +0200
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Subject: Avoid invalid memory access in context format diffs
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* src/pch.c (another_hunk): Avoid invalid memory access in context format
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diffs.
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CVE: CVE-2019-20633
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Upstream: https://cgit.git.savannah.gnu.org/cgit/patch.git/commit/?id=15b158db3ae11cb835f2eb8d2eb48e09d1a4af48
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Signed-off-by: Thomas Perale <thomas.perale@mind.be>
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---
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src/pch.c | 1 +
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1 file changed, 1 insertion(+)
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diff --git a/src/pch.c b/src/pch.c
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index a500ad9..cb54e03 100644
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--- a/src/pch.c
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+++ b/src/pch.c
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@@ -1327,6 +1327,7 @@ another_hunk (enum diff difftype, bool rev)
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ptrn_prefix_context = context;
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ptrn_suffix_context = context;
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if (repl_beginning
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+ || p_end <= 0
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|| (p_end
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!= p_ptrn_lines + 1 + (p_Char[p_end - 1] == '\n')))
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{
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--
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cgit v1.2.3
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