diff mbox series

[V2] openssh: fix CVE-2021-41617

Message ID 20211117085727.35552-1-changqing.li@windriver.com
State New
Headers show
Series [V2] openssh: fix CVE-2021-41617 | expand

Commit Message

Changqing Li Nov. 17, 2021, 8:57 a.m. UTC 
From: Changqing Li <changqing.li@windriver.com>

Signed-off-by: Changqing Li <changqing.li@windriver.com>
---
 .../openssh/openssh/CVE-2021-41617.patch      | 48 +++++++++++++++++++
 .../openssh/openssh_8.5p1.bb                  |  1 +
 2 files changed, 49 insertions(+)
 create mode 100644 meta/recipes-connectivity/openssh/openssh/CVE-2021-41617.patch
diff mbox series

Patch

diff --git a/meta/recipes-connectivity/openssh/openssh/CVE-2021-41617.patch b/meta/recipes-connectivity/openssh/openssh/CVE-2021-41617.patch
new file mode 100644
index 0000000000..bebde7f26d
--- /dev/null
+++ b/meta/recipes-connectivity/openssh/openssh/CVE-2021-41617.patch
@@ -0,0 +1,48 @@ 
+From 1f0707e8e78ef290fd0f229df3fcd2236f29db89 Mon Sep 17 00:00:00 2001
+From: Changqing Li <changqing.li@windriver.com>
+Date: Thu, 28 Oct 2021 11:11:05 +0800
+Subject: [PATCH] upstream: need initgroups() before setresgid(); reported by
+ anton@,
+
+ok deraadt@
+
+OpenBSD-Commit-ID: 6aa003ee658b316960d94078f2a16edbc25087ce
+
+CVE: CVE-2021-41617
+Upstream-Status: Backport [https://github.com/openssh/openssh-portable/commit/f3cbe43e28fe71427d41cfe3a17125b972710455
+https://github.com/openssh/openssh-portable/commit/bf944e3794eff5413f2df1ef37cddf96918c6bde]
+
+Signed-off-by: Changqing Li <changqing.li@windriver.com>
+---
+ misc.c | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+diff --git a/misc.c b/misc.c
+index d988ce3..33eca1c 100644
+--- a/misc.c
++++ b/misc.c
+@@ -56,6 +56,7 @@
+ #ifdef HAVE_PATHS_H
+ # include <paths.h>
+ #include <pwd.h>
++#include <grp.h>
+ #endif
+ #ifdef SSH_TUN_OPENBSD
+ #include <net/if.h>
+@@ -2629,6 +2630,13 @@ subprocess(const char *tag, const char *command,
+ 		}
+ 		closefrom(STDERR_FILENO + 1);
+ 
++		if (geteuid() == 0 &&
++		    initgroups(pw->pw_name, pw->pw_gid) == -1) {
++			error("%s: initgroups(%s, %u): %s", tag,
++			    pw->pw_name, (u_int)pw->pw_gid, strerror(errno));
++			_exit(1);
++		}
++
+ 		if (setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) == -1) {
+ 			error("%s: setresgid %u: %s", tag, (u_int)pw->pw_gid,
+ 			    strerror(errno));
+-- 
+2.17.1
+
diff --git a/meta/recipes-connectivity/openssh/openssh_8.5p1.bb b/meta/recipes-connectivity/openssh/openssh_8.5p1.bb
index c6de519884..9a5f37bc39 100644
--- a/meta/recipes-connectivity/openssh/openssh_8.5p1.bb
+++ b/meta/recipes-connectivity/openssh/openssh_8.5p1.bb
@@ -24,6 +24,7 @@  SRC_URI = "http://ftp.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-${PV}.tar
            file://fix-potential-signed-overflow-in-pointer-arithmatic.patch \
            file://sshd_check_keys \
            file://add-test-support-for-busybox.patch \
+           file://CVE-2021-41617.patch \
            "
 SRC_URI[sha256sum] = "f52f3f41d429aa9918e38cf200af225ccdd8e66f052da572870c89737646ec25"