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From 7bb5bc2c6592e062bf0b514cc71afd2d93e2e0dd Mon Sep 17 00:00:00 2001
From: Jeremy Harris <jgh146exb@wizmail.org>
Date: Thu, 11 May 2023 18:02:43 +0100
Subject: [PATCH 1/4] Auths: fix possible OOB write in external authenticator.
Bug 2999
---
doc/doc-txt/ChangeLog | 3 +++
src/src/auths/external.c | 2 +-
2 files changed, 4 insertions(+), 1 deletion(-)
--- a/src/auths/external.c
+++ b/src/auths/external.c
@@ -103,7 +103,7 @@ if (expand_nmax == 0) /* skip if rxd da
if (ob->server_param2)
{
uschar * s = expand_string(ob->server_param2);
- auth_vars[expand_nmax] = s;
+ auth_vars[expand_nmax = 1] = s;
expand_nstring[++expand_nmax] = s;
expand_nlength[expand_nmax] = Ustrlen(s);
if (ob->server_param3)
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