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| author |   Stefan Ghinea <stefan.ghinea@windriver.com> | 2020-08-21 22:47:47 +0300 |
|---|---|---|
| committer |   Richard Purdie <richard.purdie@linuxfoundation.org> | 2020-09-10 13:21:31 +0100 |
| commit | b6d73f9f8c055928051dc57943baf5833568d04f (patch) | |
| tree | aad32fc0ea46c920d348c51dfd252f58565d4bcc | |
| parent | 4fa2a6c171e62855ad9a2bd7a2d8507067f62988 (diff) | |
| download | openembedded-core-contrib-b6d73f9f8c055928051dc57943baf5833568d04f.tar.gz | |
qemu: CVE-2020-10756
An out-of-bounds read vulnerability was found in the SLiRP networking
implementation of the QEMU emulator. This flaw occurs in the
icmp6_send_echoreply() routine while replying to an ICMP echo request,
also known as ping. This flaw allows a malicious guest to leak the
contents of the host memory, resulting in possible information disclosure.
This flaw affects versions of libslirp before 4.3.1.
References:
https://nvd.nist.gov/vuln/detail/CVE-2020-10756
https://bugzilla.redhat.com/show_bug.cgi?id=1835986
Upstream patches:
https://gitlab.freedesktop.org/slirp/libslirp/-/commit/c7ede54cbd2e2b25385325600958ba0124e31cc0
Signed-off-by: Stefan Ghinea <stefan.ghinea@windriver.com>
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>
| -rw-r--r-- | meta/recipes-devtools/qemu/qemu.inc | 1 | ||||
| -rw-r--r-- | meta/recipes-devtools/qemu/qemu/CVE-2020-10756.patch | 40 |
2 files changed, 41 insertions, 0 deletions
diff --git a/meta/recipes-devtools/qemu/qemu.inc b/meta/recipes-devtools/qemu/qemu.inc index e686b24e80..702a817988 100644 --- a/meta/recipes-devtools/qemu/qemu.inc +++ b/meta/recipes-devtools/qemu/qemu.inc @@ -40,6 +40,7 @@ SRC_URI = "https://download.qemu.org/${BPN}-${PV}.tar.xz \ file://CVE-2020-13765.patch \ file://CVE-2020-10702.patch \ file://CVE-2020-16092.patch \ + file://CVE-2020-10756.patch \ " UPSTREAM_CHECK_REGEX = "qemu-(?P<pver>\d+(\.\d+)+)\.tar" diff --git a/meta/recipes-devtools/qemu/qemu/CVE-2020-10756.patch b/meta/recipes-devtools/qemu/qemu/CVE-2020-10756.patch new file mode 100644 index 0000000000..306aef061b --- /dev/null +++ b/meta/recipes-devtools/qemu/qemu/CVE-2020-10756.patch @@ -0,0 +1,40 @@ +From c7ede54cbd2e2b25385325600958ba0124e31cc0 Mon Sep 17 00:00:00 2001 +From: Ralf Haferkamp <rhafer@suse.com> +Date: Fri, 3 Jul 2020 14:51:16 +0200 +Subject: [PATCH] Drop bogus IPv6 messages + +Drop IPv6 message shorter than what's mentioned in the payload +length header (+ the size of the IPv6 header). They're invalid an could +lead to data leakage in icmp6_send_echoreply(). + +CVE: CVE-2020-10756 +Upstream-Status: Backport +https://gitlab.freedesktop.org/slirp/libslirp/-/commit/c7ede54cbd2e2b25385325600958ba0124e31cc0 + +[SG: Based on libslirp commit c7ede54cbd2e2b25385325600958ba0124e31cc0 and adjusted context] +Signed-off-by: Stefan Ghinea <stefan.ghinea@windriver.com> +--- + slirp/src/ip6_input.c | 7 +++++++ + 1 file changed, 7 insertions(+) + +diff --git a/slirp/src/ip6_input.c b/slirp/src/ip6_input.c +index d9d2b7e9..0f2b1785 100644 +--- a/slirp/src/ip6_input.c ++++ b/slirp/src/ip6_input.c +@@ -49,6 +49,13 @@ void ip6_input(struct mbuf *m) + goto bad; + } + ++ // Check if the message size is big enough to hold what's ++ // set in the payload length header. If not this is an invalid ++ // packet ++ if (m->m_len < ntohs(ip6->ip_pl) + sizeof(struct ip6)) { ++ goto bad; ++ } ++ + /* check ip_ttl for a correct ICMP reply */ + if (ip6->ip_hl == 0) { + icmp6_send_error(m, ICMP6_TIMXCEED, ICMP6_TIMXCEED_INTRANS); +-- +2.17.1 + |