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SUSE:SLE-12-SP4:Update
xen.21123
CVE-2021-3592-qemut-slirp-bootp-2.patch
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File CVE-2021-3592-qemut-slirp-bootp-2.patch of Package xen.21123
From 2eca0838eee1da96204545e22cdaed860d9d7c6c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= <marcandre.lureau@redhat.com> Date: Fri, 4 Jun 2021 16:15:14 +0400 Subject: [PATCH] bootp: check bootp_input buffer size MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Fixes: CVE-2021-3592 Fixes: https://gitlab.freedesktop.org/slirp/libslirp/-/issues/44 Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> --- src/bootp.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) Index: xen-4.7.6-testing/tools/qemu-xen-traditional-dir-remote/slirp/bootp.c =================================================================== --- xen-4.7.6-testing.orig/tools/qemu-xen-traditional-dir-remote/slirp/bootp.c +++ xen-4.7.6-testing/tools/qemu-xen-traditional-dir-remote/slirp/bootp.c @@ -269,9 +269,9 @@ static void bootp_reply(struct bootp_t * void bootp_input(struct mbuf *m) { - struct bootp_t *bp = mtod(m, struct bootp_t *); + struct bootp_t *bp = mtod_check(m, sizeof(struct bootp_t)); - if (bp->bp_op == BOOTP_REQUEST) { + if (bp && bp->bp_op == BOOTP_REQUEST) { bootp_reply(bp, m_end(m)); } }
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