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Without test as binary patch not supported
From 17d5e269dabc704c1cf24ebb03056142e28c9bfe Mon Sep 17 00:00:00 2001
From: Stanislav Malyshev <stas@php.net>
Date: Mon, 27 May 2019 16:32:42 -0700
Subject: [PATCH] Fix bug #78069 - Out-of-bounds read in
iconv.c:_php_iconv_mime_decode() due to integer overflow
(cherry picked from commit 7cf7148a8f8f4f55fb04de2a517d740bb6253eac)
---
ext/iconv/iconv.c | 4 +++-
ext/iconv/tests/bug78069.data | Bin 0 -> 107 bytes
ext/iconv/tests/bug78069.phpt | 15 +++++++++++++++
3 files changed, 18 insertions(+), 1 deletion(-)
create mode 100644 ext/iconv/tests/bug78069.data
create mode 100644 ext/iconv/tests/bug78069.phpt
diff --git a/ext/iconv/iconv.c b/ext/iconv/iconv.c
index ea619aa227..06145348f2 100644
--- a/ext/iconv/iconv.c
+++ b/ext/iconv/iconv.c
@@ -1645,7 +1645,9 @@ static php_iconv_err_t _php_iconv_mime_decode(smart_str *pretval, const char *st
* we can do at this point. */
if (*(p1 + 1) == '=') {
++p1;
- --str_left;
+ if (str_left > 1) {
+ --str_left;
+ }
}
err = _php_iconv_appendl(pretval, encoded_word, (size_t)((p1 + 1) - encoded_word), cd_pl);
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