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-rw-r--r--gnu/local.mk1
-rw-r--r--gnu/packages/mail.scm1
-rw-r--r--gnu/packages/patches/exim-CVE-2017-16944.patch87
3 files changed, 89 insertions, 0 deletions
diff --git a/gnu/local.mk b/gnu/local.mk
index eaf7514931..13acb6797c 100644
--- a/gnu/local.mk
+++ b/gnu/local.mk
@@ -616,6 +616,7 @@ dist_patch_DATA = \
%D%/packages/patches/eudev-rules-directory.patch \
%D%/packages/patches/evilwm-lost-focus-bug.patch \
%D%/packages/patches/exim-CVE-2017-16943.patch \
+ %D%/packages/patches/exim-CVE-2017-16944.patch \
%D%/packages/patches/exim-CVE-2017-1000369.patch \
%D%/packages/patches/exiv2-CVE-2017-14860.patch \
%D%/packages/patches/exiv2-CVE-2017-14859-14862-14864.patch \
diff --git a/gnu/packages/mail.scm b/gnu/packages/mail.scm
index fbe39bef76..b9656c7dd8 100644
--- a/gnu/packages/mail.scm
+++ b/gnu/packages/mail.scm
@@ -1043,6 +1043,7 @@ delivery.")
(string-append "ftp://ftp.exim.org/pub/exim/exim4/old/exim-"
version ".tar.bz2")))
(patches (search-patches "exim-CVE-2017-16943.patch"
+ "exim-CVE-2017-16944.patch"
"exim-CVE-2017-1000369.patch"))
(sha256
(base32
diff --git a/gnu/packages/patches/exim-CVE-2017-16944.patch b/gnu/packages/patches/exim-CVE-2017-16944.patch
new file mode 100644
index 0000000000..e4e8313c9c
--- /dev/null
+++ b/gnu/packages/patches/exim-CVE-2017-16944.patch
@@ -0,0 +1,87 @@
+Fix CVE-2017-16944:
+
+https://bugs.exim.org/show_bug.cgi?id=2201
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-16944
+
+Patch copied from upstream source repository:
+
+https://git.exim.org/exim.git/commit/4804c62909a62a3ac12ec4777ebd48c541028965
+
+From 4804c62909a62a3ac12ec4777ebd48c541028965 Mon Sep 17 00:00:00 2001
+From: "Heiko Schlittermann (HS12-RIPE)" <hs@schlittermann.de>
+Date: Mon, 27 Nov 2017 22:42:33 +0100
+Subject: [PATCH] Chunking: do not treat the first lonely dot special.
+ CVE-2017-16944, Bug 2201
+
+(cherry picked from commit 178ecb70987f024f0e775d87c2f8b2cf587dd542)
+
+Change log update
+
+(cherry picked from commit b488395f4d99d44a950073a64b35ec8729102782)
+---
+ doc/doc-txt/ChangeLog | 6 +++++-
+ src/src/receive.c | 2 +-
+ src/src/smtp_in.c | 7 +++++++
+ 3 files changed, 13 insertions(+), 2 deletions(-)
+
+#diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog
+#index a2d9339..541ebaf 100644
+#--- a/doc/doc-txt/ChangeLog
+#+++ b/doc/doc-txt/ChangeLog
+#@@ -61,7 +61,11 @@ JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
+#
+# JH/34 Bug 2199: fix a use-after-free while reading smtp input for header lines.
+# A crafted sequence of BDAT commands could result in in-use memory beeing
+#- freed.
+#+ freed. CVE-2017-16943.
+#+
+#+HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
+#+ from SMTP input. Previously it was always done; now only done for DATA
+#+ and not BDAT commands. CVE-2017-16944.
+#
+#
+# Exim version 4.89
+diff --git a/src/src/receive.c b/src/src/receive.c
+index 20672db..2812ea2 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/src/smtp_in.c b/src/src/smtp_in.c
+index 1b45f84..0207540 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)
+--
+1.9.1
+