diff network/openssh/CVE-2019-6109.patch @ 121:f2c94d482098

network/openssh: initial import, closes #1156
author David Demelier <markand@malikania.fr>
date Sun, 10 Mar 2019 11:49:40 +0100
parents
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/network/openssh/CVE-2019-6109.patch	Sun Mar 10 11:49:40 2019 +0100
@@ -0,0 +1,276 @@
+From 11b88754cadcad0ba79b4ffcc127223248dccb54 Mon Sep 17 00:00:00 2001
+From: "dtucker@openbsd.org" <dtucker@openbsd.org>
+Date: Wed, 23 Jan 2019 08:01:46 +0000
+Subject: upstream: Sanitize scp filenames via snmprintf. To do this we move
+
+the progressmeter formatting outside of signal handler context and have the
+atomicio callback called for EINTR too.  bz#2434 with contributions from djm
+and jjelen at redhat.com, ok djm@
+
+OpenBSD-Commit-ID: 1af61c1f70e4f3bd8ab140b9f1fa699481db57d8
+
+CVE-2019-6109
+
+Origin: backport, https://anongit.mindrot.org/openssh.git/commit/?id=8976f1c4b2721c26e878151f52bdf346dfe2d54c
+Bug-Debian: https://bugs.debian.org/793412
+Last-Update: 2019-02-08
+
+Patch-Name: sanitize-scp-filenames-via-snmprintf.patch
+---
+ atomicio.c      | 20 ++++++++++++++-----
+ progressmeter.c | 53 ++++++++++++++++++++++---------------------------
+ progressmeter.h |  3 ++-
+ scp.c           |  1 +
+ sftp-client.c   | 16 ++++++++-------
+ 5 files changed, 51 insertions(+), 42 deletions(-)
+
+diff --git a/atomicio.c b/atomicio.c
+index f854a06f5..d91bd7621 100644
+--- a/atomicio.c
++++ b/atomicio.c
+@@ -1,4 +1,4 @@
+-/* $OpenBSD: atomicio.c,v 1.28 2016/07/27 23:18:12 djm Exp $ */
++/* $OpenBSD: atomicio.c,v 1.29 2019/01/23 08:01:46 dtucker Exp $ */
+ /*
+  * Copyright (c) 2006 Damien Miller. All rights reserved.
+  * Copyright (c) 2005 Anil Madhavapeddy. All rights reserved.
+@@ -65,9 +65,14 @@ atomicio6(ssize_t (*f) (int, void *, size_t), int fd, void *_s, size_t n,
+ 		res = (f) (fd, s + pos, n - pos);
+ 		switch (res) {
+ 		case -1:
+-			if (errno == EINTR)
++			if (errno == EINTR) {
++				/* possible SIGALARM, update callback */
++				if (cb != NULL && cb(cb_arg, 0) == -1) {
++					errno = EINTR;
++					return pos;
++				}
+ 				continue;
+-			if (errno == EAGAIN || errno == EWOULDBLOCK) {
++			} else if (errno == EAGAIN || errno == EWOULDBLOCK) {
+ #ifndef BROKEN_READ_COMPARISON
+ 				(void)poll(&pfd, 1, -1);
+ #endif
+@@ -122,9 +127,14 @@ atomiciov6(ssize_t (*f) (int, const struct iovec *, int), int fd,
+ 		res = (f) (fd, iov, iovcnt);
+ 		switch (res) {
+ 		case -1:
+-			if (errno == EINTR)
++			if (errno == EINTR) {
++				/* possible SIGALARM, update callback */
++				if (cb != NULL && cb(cb_arg, 0) == -1) {
++					errno = EINTR;
++					return pos;
++				}
+ 				continue;
+-			if (errno == EAGAIN || errno == EWOULDBLOCK) {
++			} else if (errno == EAGAIN || errno == EWOULDBLOCK) {
+ #ifndef BROKEN_READV_COMPARISON
+ 				(void)poll(&pfd, 1, -1);
+ #endif
+diff --git a/progressmeter.c b/progressmeter.c
+index fe9bf52e4..add462dde 100644
+--- a/progressmeter.c
++++ b/progressmeter.c
+@@ -1,4 +1,4 @@
+-/* $OpenBSD: progressmeter.c,v 1.45 2016/06/30 05:17:05 dtucker Exp $ */
++/* $OpenBSD: progressmeter.c,v 1.46 2019/01/23 08:01:46 dtucker Exp $ */
+ /*
+  * Copyright (c) 2003 Nils Nordman.  All rights reserved.
+  *
+@@ -31,6 +31,7 @@
+ 
+ #include <errno.h>
+ #include <signal.h>
++#include <stdarg.h>
+ #include <stdio.h>
+ #include <string.h>
+ #include <time.h>
+@@ -39,6 +40,7 @@
+ #include "progressmeter.h"
+ #include "atomicio.h"
+ #include "misc.h"
++#include "utf8.h"
+ 
+ #define DEFAULT_WINSIZE 80
+ #define MAX_WINSIZE 512
+@@ -61,7 +63,7 @@ static void setscreensize(void);
+ void refresh_progress_meter(void);
+ 
+ /* signal handler for updating the progress meter */
+-static void update_progress_meter(int);
++static void sig_alarm(int);
+ 
+ static double start;		/* start progress */
+ static double last_update;	/* last progress update */
+@@ -74,6 +76,7 @@ static long stalled;		/* how long we have been stalled */
+ static int bytes_per_second;	/* current speed in bytes per second */
+ static int win_size;		/* terminal window size */
+ static volatile sig_atomic_t win_resized; /* for window resizing */
++static volatile sig_atomic_t alarm_fired;
+ 
+ /* units for format_size */
+ static const char unit[] = " KMGT";
+@@ -126,9 +129,17 @@ refresh_progress_meter(void)
+ 	off_t bytes_left;
+ 	int cur_speed;
+ 	int hours, minutes, seconds;
+-	int i, len;
+ 	int file_len;
+ 
++	if ((!alarm_fired && !win_resized) || !can_output())
++		return;
++	alarm_fired = 0;
++
++	if (win_resized) {
++		setscreensize();
++		win_resized = 0;
++	}
++
+ 	transferred = *counter - (cur_pos ? cur_pos : start_pos);
+ 	cur_pos = *counter;
+ 	now = monotime_double();
+@@ -158,16 +169,11 @@ refresh_progress_meter(void)
+ 
+ 	/* filename */
+ 	buf[0] = '\0';
+-	file_len = win_size - 35;
++	file_len = win_size - 36;
+ 	if (file_len > 0) {
+-		len = snprintf(buf, file_len + 1, "\r%s", file);
+-		if (len < 0)
+-			len = 0;
+-		if (len >= file_len + 1)
+-			len = file_len;
+-		for (i = len; i < file_len; i++)
+-			buf[i] = ' ';
+-		buf[file_len] = '\0';
++		buf[0] = '\r';
++		snmprintf(buf+1, sizeof(buf)-1 , &file_len, "%*s",
++		    file_len * -1, file);
+ 	}
+ 
+ 	/* percent of transfer done */
+@@ -228,22 +234,11 @@ refresh_progress_meter(void)
+ 
+ /*ARGSUSED*/
+ static void
+-update_progress_meter(int ignore)
++sig_alarm(int ignore)
+ {
+-	int save_errno;
+-
+-	save_errno = errno;
+-
+-	if (win_resized) {
+-		setscreensize();
+-		win_resized = 0;
+-	}
+-	if (can_output())
+-		refresh_progress_meter();
+-
+-	signal(SIGALRM, update_progress_meter);
++	signal(SIGALRM, sig_alarm);
++	alarm_fired = 1;
+ 	alarm(UPDATE_INTERVAL);
+-	errno = save_errno;
+ }
+ 
+ void
+@@ -259,10 +254,9 @@ start_progress_meter(const char *f, off_t filesize, off_t *ctr)
+ 	bytes_per_second = 0;
+ 
+ 	setscreensize();
+-	if (can_output())
+-		refresh_progress_meter();
++	refresh_progress_meter();
+ 
+-	signal(SIGALRM, update_progress_meter);
++	signal(SIGALRM, sig_alarm);
+ 	signal(SIGWINCH, sig_winch);
+ 	alarm(UPDATE_INTERVAL);
+ }
+@@ -286,6 +280,7 @@ stop_progress_meter(void)
+ static void
+ sig_winch(int sig)
+ {
++	signal(SIGWINCH, sig_winch);
+ 	win_resized = 1;
+ }
+ 
+diff --git a/progressmeter.h b/progressmeter.h
+index bf179dca6..8f6678060 100644
+--- a/progressmeter.h
++++ b/progressmeter.h
+@@ -1,4 +1,4 @@
+-/* $OpenBSD: progressmeter.h,v 1.3 2015/01/14 13:54:13 djm Exp $ */
++/* $OpenBSD: progressmeter.h,v 1.4 2019/01/23 08:01:46 dtucker Exp $ */
+ /*
+  * Copyright (c) 2002 Nils Nordman.  All rights reserved.
+  *
+@@ -24,4 +24,5 @@
+  */
+ 
+ void	start_progress_meter(const char *, off_t, off_t *);
++void	refresh_progress_meter(void);
+ void	stop_progress_meter(void);
+diff --git a/scp.c b/scp.c
+index 7163d33dc..80308573c 100644
+--- a/scp.c
++++ b/scp.c
+@@ -593,6 +593,7 @@ scpio(void *_cnt, size_t s)
+ 	off_t *cnt = (off_t *)_cnt;
+ 
+ 	*cnt += s;
++	refresh_progress_meter();
+ 	if (limit_kbps > 0)
+ 		bandwidth_limit(&bwlimit, s);
+ 	return 0;
+diff --git a/sftp-client.c b/sftp-client.c
+index 4986d6d8d..2bc698f86 100644
+--- a/sftp-client.c
++++ b/sftp-client.c
+@@ -101,7 +101,9 @@ sftpio(void *_bwlimit, size_t amount)
+ {
+ 	struct bwlimit *bwlimit = (struct bwlimit *)_bwlimit;
+ 
+-	bandwidth_limit(bwlimit, amount);
++	refresh_progress_meter();
++	if (bwlimit != NULL)
++		bandwidth_limit(bwlimit, amount);
+ 	return 0;
+ }
+ 
+@@ -121,8 +123,8 @@ send_msg(struct sftp_conn *conn, struct sshbuf *m)
+ 	iov[1].iov_base = (u_char *)sshbuf_ptr(m);
+ 	iov[1].iov_len = sshbuf_len(m);
+ 
+-	if (atomiciov6(writev, conn->fd_out, iov, 2,
+-	    conn->limit_kbps > 0 ? sftpio : NULL, &conn->bwlimit_out) !=
++	if (atomiciov6(writev, conn->fd_out, iov, 2, sftpio,
++	    conn->limit_kbps > 0 ? &conn->bwlimit_out : NULL) !=
+ 	    sshbuf_len(m) + sizeof(mlen))
+ 		fatal("Couldn't send packet: %s", strerror(errno));
+ 
+@@ -138,8 +140,8 @@ get_msg_extended(struct sftp_conn *conn, struct sshbuf *m, int initial)
+ 
+ 	if ((r = sshbuf_reserve(m, 4, &p)) != 0)
+ 		fatal("%s: buffer error: %s", __func__, ssh_err(r));
+-	if (atomicio6(read, conn->fd_in, p, 4,
+-	    conn->limit_kbps > 0 ? sftpio : NULL, &conn->bwlimit_in) != 4) {
++	if (atomicio6(read, conn->fd_in, p, 4, sftpio,
++	    conn->limit_kbps > 0 ? &conn->bwlimit_in : NULL) != 4) {
+ 		if (errno == EPIPE || errno == ECONNRESET)
+ 			fatal("Connection closed");
+ 		else
+@@ -157,8 +159,8 @@ get_msg_extended(struct sftp_conn *conn, struct sshbuf *m, int initial)
+ 
+ 	if ((r = sshbuf_reserve(m, msg_len, &p)) != 0)
+ 		fatal("%s: buffer error: %s", __func__, ssh_err(r));
+-	if (atomicio6(read, conn->fd_in, p, msg_len,
+-	    conn->limit_kbps > 0 ? sftpio : NULL, &conn->bwlimit_in)
++	if (atomicio6(read, conn->fd_in, p, msg_len, sftpio,
++	    conn->limit_kbps > 0 ? &conn->bwlimit_in : NULL)
+ 	    != msg_len) {
+ 		if (errno == EPIPE)
+ 			fatal("Connection closed");