openssh: fix for CVE-2014-2532

sshd in OpenSSH before 6.6 does not properly support wildcards on
AcceptEnv lines in sshd_config, which allows remote attackers to
bypass intended environment restrictions by using a substring located
before a wildcard character.

(From OE-Core rev: a8d3b8979c27a8dc87971b66a1d9d9282f660596)

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 24 insertions, 1 deletions

diff --git a/meta/recipes-connectivity/openssh/openssh/openssh-CVE-2014-2532.patch b/meta/recipes-connectivity/openssh/openssh/openssh-CVE-2014-2532.patch
new file mode 100644
index 0000000000..3deaf3f0e9
--- /dev/null
+++ b/meta/recipes-connectivity/openssh/openssh/openssh-CVE-2014-2532.patch
@@ -0,0 +1,22 @@
+Upstream-Status: Backport
+
+Fix for CVE-2014-2532
+
+Backported from openssh-6.6p1.tar.gz
+
+Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
+---
+--- a/session.c
++++ b/session.c
+@@ -955,6 +955,11 @@
+        u_int envsize;
+        u_int i, namelen;
+ 
++       if (strchr(name, '=') != NULL) {
++               error("Invalid environment variable \"%.100s\"", name);
++               return;
++       }
++
+        /*
+         * If we're passed an uninitialized list, allocate a single null
+         * entry before continuing.
diff --git a/meta/recipes-connectivity/openssh/openssh_6.5p1.bb b/meta/recipes-connectivity/openssh/openssh_6.5p1.bb
index b93b9ae79f..230f38ab31 100644
--- a/meta/recipes-connectivity/openssh/openssh_6.5p1.bb
+++ b/meta/recipes-connectivity/openssh/openssh_6.5p1.bb
@@ -29,7 +29,8 @@ SRC_URI = "ftp://ftp.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-${PV}.tar.
            file://sshdgenkeys.service \
            file://volatiles.99_sshd \
            file://add-test-support-for-busybox.patch \
-           file://run-ptest"
+           file://run-ptest \
+           file://openssh-CVE-2014-2532.patch"
 
 PAM_SRC_URI = "file://sshd"