-From: "Heiko Schlittermann (HS12-RIPE)" <hs@schlittermann.de>
-Date: Mon, 27 Nov 2017 22:42:33 +0100
-Subject: Chunking: do not treat the first lonely dot special. CVE-2017-16944,
- Bug 2201
-Origin: https://git.exim.org/exim.git/commit/4804c62909a62a3ac12ec4777ebd48c541028965
-Bug: https://bugs.exim.org/show_bug.cgi?id=2201
-Bug-Debian: https://bugs.debian.org/882671
-Bug-Debian-Security: https://security-tracker.debian.org/tracker/CVE-2017-16944
-
-(cherry picked from commit 178ecb70987f024f0e775d87c2f8b2cf587dd542)
-
-Change log update
-
-(cherry picked from commit b488395f4d99d44a950073a64b35ec8729102782)
-
----
-diff --git a/src/receive.c b/src/receive.c
-index 20672dbe..2812ea2c 100644
---- a/src/receive.c
-+++ b/src/receive.c
-@@ -1827,7 +1827,7 @@ for (;;)
- prevent further reading), and break out of the loop, having freed the
- empty header, and set next = NULL to indicate no data line. */
-
-- if (ptr == 0 && ch == '.' && (smtp_input || dot_ends))
-+ if (ptr == 0 && ch == '.' && dot_ends)
- {
- ch = (receive_getc)(GETC_BUFFER_UNLIMITED);
- if (ch == '\r')
-diff --git a/src/smtp_in.c b/src/smtp_in.c
-index 1b45f84d..02075404 100644
---- a/src/smtp_in.c
-+++ b/src/smtp_in.c
-@@ -4955,16 +4955,23 @@ while (done <= 0)
- DEBUG(D_receive) debug_printf("chunking state %d, %d bytes\n",
- (int)chunking_state, chunking_data_left);
-
-+ /* push the current receive_* function on the "stack", and
-+ replace them by bdat_getc(), which in turn will use the lwr_receive_*
-+ functions to do the dirty work. */
- lwr_receive_getc = receive_getc;
- lwr_receive_ungetc = receive_ungetc;
-+
- receive_getc = bdat_getc;
- receive_ungetc = bdat_ungetc;
-
-+ dot_ends = FALSE;
-+
- goto DATA_BDAT;
- }
-
- case DATA_CMD:
- HAD(SCH_DATA);
-+ dot_ends = TRUE;
-
- DATA_BDAT: /* Common code for DATA and BDAT */
- if (!discarded && recipients_count <= 0)
---
-2.15.0
-