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-rw-r--r--gnu/packages/patches/qemu-CVE-2018-16872.patch88
-rw-r--r--gnu/packages/patches/qemu-CVE-2019-6778.patch43
-rw-r--r--gnu/packages/virtualization.scm2
3 files changed, 133 insertions, 0 deletions
diff --git a/gnu/packages/patches/qemu-CVE-2018-16872.patch b/gnu/packages/patches/qemu-CVE-2018-16872.patch
new file mode 100644
index 0000000000..094e823ee4
--- /dev/null
+++ b/gnu/packages/patches/qemu-CVE-2018-16872.patch
@@ -0,0 +1,88 @@
+Fixes CVE-2018-16872:
+
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-16872
+
+Patch copied from upstream source repository:
+
+https://git.qemu.org/?p=qemu.git;a=commitdiff;h=bab9df35ce73d1c8e19a37e2737717ea1c984dc1
+
+From bab9df35ce73d1c8e19a37e2737717ea1c984dc1 Mon Sep 17 00:00:00 2001
+From: Gerd Hoffmann <kraxel@redhat.com>
+Date: Thu, 13 Dec 2018 13:25:11 +0100
+Subject: [PATCH] usb-mtp: use O_NOFOLLOW and O_CLOEXEC.
+
+Open files and directories with O_NOFOLLOW to avoid symlinks attacks.
+While being at it also add O_CLOEXEC.
+
+usb-mtp only handles regular files and directories and ignores
+everything else, so users should not see a difference.
+
+Because qemu ignores symlinks, carrying out a successful symlink attack
+requires swapping an existing file or directory below rootdir for a
+symlink and winning the race against the inotify notification to qemu.
+
+Fixes: CVE-2018-16872
+Cc: Prasad J Pandit <ppandit@redhat.com>
+Cc: Bandan Das <bsd@redhat.com>
+Reported-by: Michael Hanselmann <public@hansmi.ch>
+Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
+Reviewed-by: Michael Hanselmann <public@hansmi.ch>
+Message-id: 20181213122511.13853-1-kraxel@redhat.com
+---
+ hw/usb/dev-mtp.c | 13 +++++++++----
+ 1 file changed, 9 insertions(+), 4 deletions(-)
+
+diff --git a/hw/usb/dev-mtp.c b/hw/usb/dev-mtp.c
+index 100b7171f4..36c43b8c20 100644
+--- a/hw/usb/dev-mtp.c
++++ b/hw/usb/dev-mtp.c
+@@ -653,13 +653,18 @@ static void usb_mtp_object_readdir(MTPState *s, MTPObject *o)
+ {
+ struct dirent *entry;
+ DIR *dir;
++ int fd;
+
+ if (o->have_children) {
+ return;
+ }
+ o->have_children = true;
+
+- dir = opendir(o->path);
++ fd = open(o->path, O_DIRECTORY | O_CLOEXEC | O_NOFOLLOW);
++ if (fd < 0) {
++ return;
++ }
++ dir = fdopendir(fd);
+ if (!dir) {
+ return;
+ }
+@@ -1007,7 +1012,7 @@ static MTPData *usb_mtp_get_object(MTPState *s, MTPControl *c,
+
+ trace_usb_mtp_op_get_object(s->dev.addr, o->handle, o->path);
+
+- d->fd = open(o->path, O_RDONLY);
++ d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW);
+ if (d->fd == -1) {
+ usb_mtp_data_free(d);
+ return NULL;
+@@ -1031,7 +1036,7 @@ static MTPData *usb_mtp_get_partial_object(MTPState *s, MTPControl *c,
+ c->argv[1], c->argv[2]);
+
+ d = usb_mtp_data_alloc(c);
+- d->fd = open(o->path, O_RDONLY);
++ d->fd = open(o->path, O_RDONLY | O_CLOEXEC | O_NOFOLLOW);
+ if (d->fd == -1) {
+ usb_mtp_data_free(d);
+ return NULL;
+@@ -1658,7 +1663,7 @@ static void usb_mtp_write_data(MTPState *s)
+ 0, 0, 0, 0);
+ goto done;
+ }
+- d->fd = open(path, O_CREAT | O_WRONLY, mask);
++ d->fd = open(path, O_CREAT | O_WRONLY | O_CLOEXEC | O_NOFOLLOW, mask);
+ if (d->fd == -1) {
+ usb_mtp_queue_result(s, RES_STORE_FULL, d->trans,
+ 0, 0, 0, 0);
+--
+2.20.1
+
diff --git a/gnu/packages/patches/qemu-CVE-2019-6778.patch b/gnu/packages/patches/qemu-CVE-2019-6778.patch
new file mode 100644
index 0000000000..315f2922da
--- /dev/null
+++ b/gnu/packages/patches/qemu-CVE-2019-6778.patch
@@ -0,0 +1,43 @@
+Fixes CVE-2019-6778:
+
+https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-6778
+
+Patch copied from upstream source repository:
+
+https://git.qemu.org/?p=qemu.git;a=commitdiff;h=a7104eda7dab99d0cdbd3595c211864cba415905
+
+From a7104eda7dab99d0cdbd3595c211864cba415905 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>
+---
+ slirp/tcp_subr.c | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/slirp/tcp_subr.c b/slirp/tcp_subr.c
+index 4a9a5b5edc..23a841f26e 100644
+--- a/slirp/tcp_subr.c
++++ b/slirp/tcp_subr.c
+@@ -634,6 +634,11 @@ 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;
+--
+2.20.1
+
diff --git a/gnu/packages/virtualization.scm b/gnu/packages/virtualization.scm
index d178a08413..e98e7eb09e 100644
--- a/gnu/packages/virtualization.scm
+++ b/gnu/packages/virtualization.scm
@@ -110,6 +110,8 @@
(method url-fetch)
(uri (string-append "https://download.qemu.org/qemu-"
version ".tar.xz"))
+ (patches (search-patches "qemu-CVE-2018-16872.patch"
+ "qemu-CVE-2019-6778.patch"))
(sha256
(base32
"1z5bd5nfyjvhfi1s95labc82y4hjdjjkdabw931362ls0zghh1ba"))))
generated by cgit v1.2.3 (git 2.45.0) at 2024-11-21 23:10:28 +0000