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32 lines
891 B
Diff
32 lines
891 B
Diff
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Fix out-of-bounds read in c_substitute():
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http://seclists.org/oss-sec/2016/q4/612
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Patch copied from upstream source repository:
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https://github.com/tcsh-org/tcsh/commit/6a542dc4fb2ba26518a47e9b3a9bcd6a91b94596
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From 6a542dc4fb2ba26518a47e9b3a9bcd6a91b94596 Mon Sep 17 00:00:00 2001
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From: christos <christos>
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Date: Fri, 2 Dec 2016 16:59:28 +0000
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Subject: [PATCH] Fix out of bounds read (Brooks Davis) (reproduce by starting
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tcsh and hitting tab at the prompt)
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---
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ed.chared.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/ed.chared.c b/ed.chared.c
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index 1277e53..310393e 100644
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--- ed.chared.c
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+++ ed.chared.c
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@@ -750,7 +750,7 @@ c_substitute(void)
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/*
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* If we found a history character, go expand it.
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*/
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- if (HIST != '\0' && *p == HIST)
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+ if (p >= InputBuf && HIST != '\0' && *p == HIST)
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nr_exp = c_excl(p);
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else
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nr_exp = 0;
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