1 files changed, 41 insertions, 0 deletions

diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2019-6778.patch b/meta/recipes-devtools/qemu/qemu/CVE-2019-6778.patch
new file mode 100644
index 0000000000..5b14596042
--- /dev/null
+++ b/meta/recipes-devtools/qemu/qemu/CVE-2019-6778.patch
@@ -0,0 +1,41 @@
+From b6c0fa3b435375918714e107b22de2ef13a41c26 Mon Sep 17 00:00:00 2001
+From: Prasad J Pandit <pjp@fedoraproject.org>
+Date: Sun, 13 Jan 2019 23:29:48 +0530
+Subject: [PATCH] slirp: check data length while emulating ident function
+
+While emulating identification protocol, tcp_emu() does not check
+available space in the 'sc_rcv->sb_data' buffer. It could lead to
+heap buffer overflow issue. Add check to avoid it.
+
+Reported-by: Kira <864786842@qq.com>
+Signed-off-by: Prasad J Pandit <pjp@fedoraproject.org>
+Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
+
+CVE: CVE-2019-6778
+Upstream-Status: Backport
+[https://git.qemu.org/?p=qemu.git;a=commit;h=a7104eda7dab99d0cdbd3595c211864cba415905]
+
+Signed-off-by: Dan Tran <dantran@microsoft.com>
+---
+ slirp/tcp_subr.c | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/slirp/tcp_subr.c b/slirp/tcp_subr.c
+index 8d0f94b75f..7277aadfdf 100644
+--- a/slirp/tcp_subr.c
++++ b/slirp/tcp_subr.c
+@@ -640,6 +640,11 @@ tcp_emu(struct socket *so, struct mbuf *m)
+                        socklen_t addrlen = sizeof(struct sockaddr_in);
+                        struct sbuf *so_rcv = &so->so_rcv;
+ 
++                       if (m->m_len > so_rcv->sb_datalen
++                                       - (so_rcv->sb_wptr - so_rcv->sb_data)) {
++                           return 1;
++                       }
++
+                        memcpy(so_rcv->sb_wptr, m->m_data, m->m_len);
+                        so_rcv->sb_wptr += m->m_len;
+                        so_rcv->sb_rptr += m->m_len;
+-- 
+2.22.0.vfs.1.1.57.gbaf16c8
+