curl: Security fix for CVE-2017-1000254

FTP PWD response parser out of bounds read

References:
https://curl.haxx.se/docs/adv_20171004.html
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-1000254

Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
Signed-off-by: Adrian Dudau <adrian.dudau@enea.com>

2 files changed, 140 insertions, 0 deletions

diff --git a/recipes-support/curl/curl/CVE-2017-1000254.patch b/recipes-support/curl/curl/CVE-2017-1000254.patch
new file mode 100644
index 0000000..d37b859
--- /dev/null
+++ b/recipes-support/curl/curl/CVE-2017-1000254.patch
@@ -0,0 +1,139 @@
+From f3be14cc3f3c56f612a0ffe1706fca14fe9eaf53 Mon Sep 17 00:00:00 2001
+From: Sona Sarmadi <sona.sarmadi@enea.com>
+Date: Mon, 4 Dec 2017 09:38:43 +0100
+Subject: [PATCH] curl: fix for CVE-2017-1000254
+
+FTP: zero terminate the entry path even on bad input
+
+... a single double quote could leave the entry path buffer without a zero
+terminating byte.
+
+CVE: CVE-2017-1000254
+Upstream-Status: Backport [https://curl.haxx.se/CVE-2017-1000254.patch]
+
+Test 1152 added to verify.
+
+Reported-by: Max Dymond
+Bug: https://curl.haxx.se/docs/adv_20171004.html
+Signed-off-by: Sona Sarmadi <sona.sarmadi@enea.com>
+---
+ lib/ftp.c               |  7 ++++--
+ tests/data/Makefile.inc |  1 +
+ tests/data/test1152     | 61 +++++++++++++++++++++++++++++++++++++++++++++++++
+ 3 files changed, 67 insertions(+), 2 deletions(-)
+ create mode 100644 tests/data/test1152
+
+diff --git a/lib/ftp.c b/lib/ftp.c
+index aa4d5ac..cab3699 100644
+--- a/lib/ftp.c
++++ b/lib/ftp.c
+@@ -2826,6 +2826,7 @@ static CURLcode ftp_statemach_act(struct connectdata *conn)
+         const size_t buf_size = CURL_BUFSIZE(data->set.buffer_size);
+         char *dir;
+         char *store;
++        bool entry_extracted = FALSE;
+ 
+         dir = malloc(nread + 1);
+         if(!dir)
+@@ -2857,7 +2858,7 @@ static CURLcode ftp_statemach_act(struct connectdata *conn)
+               }
+               else {
+                 /* end of path */
+-                *store = '\0'; /* zero terminate */
++                entry_extracted = TRUE;
+                 break; /* get out of this loop */
+               }
+             }
+@@ -2866,7 +2867,9 @@ static CURLcode ftp_statemach_act(struct connectdata *conn)
+             store++;
+             ptr++;
+           }
+-
++          *store = '\0'; /* zero terminate */
++        }
++        if(entry_extracted) {
+           /* If the path name does not look like an absolute path (i.e.: it
+              does not start with a '/'), we probably need some server-dependent
+              adjustments. For example, this is the case when connecting to
+diff --git a/tests/data/Makefile.inc b/tests/data/Makefile.inc
+index 8251ab9..01ad40d 100644
+--- a/tests/data/Makefile.inc
++++ b/tests/data/Makefile.inc
+@@ -121,6 +121,7 @@ test1120 test1121 test1122 test1123 test1124 test1125 test1126 test1127 \
+ test1128 test1129 test1130 test1131 test1132 test1133 test1134 test1135 \
+ test1136 test1137 test1138 test1139 test1140 test1141 test1142 test1143 \
+ test1144 test1145 test1146 \
++test1152 \
+ test1200 test1201 test1202 test1203 test1204 test1205 test1206 test1207 \
+ test1208 test1209 test1210 test1211 test1212 test1213 test1214 test1215 \
+ test1216 test1217 test1218 test1219 \
+diff --git a/tests/data/test1152 b/tests/data/test1152
+new file mode 100644
+index 0000000..c55739d
+--- /dev/null
++++ b/tests/data/test1152
+@@ -0,0 +1,61 @@
++<testcase>
++<info>
++<keywords>
++FTP
++PASV
++LIST
++</keywords>
++</info>
++#
++# Server-side
++<reply>
++<servercmd>
++REPLY PWD 257 "just one
++</servercmd>
++
++# When doing LIST, we get the default list output hard-coded in the test
++# FTP server
++<data mode="text">
++total 20
++drwxr-xr-x   8 98       98           512 Oct 22 13:06 .
++drwxr-xr-x   8 98       98           512 Oct 22 13:06 ..
++drwxr-xr-x   2 98       98           512 May  2  1996 curl-releases
++-r--r--r--   1 0        1             35 Jul 16  1996 README
++lrwxrwxrwx   1 0        1              7 Dec  9  1999 bin -> usr/bin
++dr-xr-xr-x   2 0        1            512 Oct  1  1997 dev
++drwxrwxrwx   2 98       98           512 May 29 16:04 download.html
++dr-xr-xr-x   2 0        1            512 Nov 30  1995 etc
++drwxrwxrwx   2 98       1            512 Oct 30 14:33 pub
++dr-xr-xr-x   5 0        1            512 Oct  1  1997 usr
++</data>
++</reply>
++
++#
++# Client-side
++<client>
++<server>
++ftp
++</server>
++ <name>
++FTP with uneven quote in PWD response
++ </name>
++ <command>
++ftp://%HOSTIP:%FTPPORT/test-1152/
++</command>
++</client>
++
++#
++# Verify data after the test has been "shot"
++<verify>
++<protocol>
++USER anonymous
++PASS ftp@example.com
++PWD
++CWD test-1152
++EPSV
++TYPE A
++LIST
++QUIT
++</protocol>
++</verify>
++</testcase>
+-- 
+1.9.1
+
diff --git a/recipes-support/curl/curl_%.bbappend b/recipes-support/curl/curl_%.bbappend
index ca548e8..82db0f7 100644
--- a/recipes-support/curl/curl_%.bbappend
+++ b/recipes-support/curl/curl_%.bbappend
@@ -4,4 +4,5 @@ FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
 SRC_URI += "file://CVE-2017-7407.patch \
             file://CVE-2017-7468.patch \
             file://CVE-2017-9502.patch \
+            file://CVE-2017-1000254.patch \
            "